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Serverside exceptions using exportClientData (leaking memory?)

April 24, 2015, 9:36 am
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Hi Isomorphic,

I got a server exception for a exportClientData request. It *seems* that the exceptions lead to further Java RAM related exceptions in the progress.
Please see these server logs (using v10.0p_2015-04-10):

1st request (null pointer exception in com.isomorphic class):
Code:
=== 2015-04-24 17:39:01,245 [c-39] INFO  RequestContext - URL: '/test/lms/sc/IDACall', User-Agent: 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0': Moz (Gecko) with Accept-Encoding header
=== 2015-04-24 17:39:01,245 [c-39] DEBUG LMSIDACall - Header Name:Value pair: host:REMOVED
=== 2015-04-24 17:39:01,245 [c-39] DEBUG LMSIDACall - Header Name:Value pair: user-agent:Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
=== 2015-04-24 17:39:01,245 [c-39] DEBUG LMSIDACall - Header Name:Value pair: accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
=== 2015-04-24 17:39:01,245 [c-39] DEBUG LMSIDACall - Header Name:Value pair: Accept-Language:de,en-US;q=0.7,en;q=0.3
=== 2015-04-24 17:39:01,246 [c-39] DEBUG LMSIDACall - Header Name:Value pair: Accept-Encoding:gzip, deflate
=== 2015-04-24 17:39:01,246 [c-39] DEBUG LMSIDACall - Header Name:Value pair: referer:REMOVED
=== 2015-04-24 17:39:01,246 [c-39] DEBUG LMSIDACall - Header Name:Value pair: cookie:JSESSIONID=REMOVED; isc_cState=ready; GLog=REMOVED
=== 2015-04-24 17:39:01,246 [c-39] DEBUG LMSIDACall - Header Name:Value pair: connection:keep-alive
=== 2015-04-24 17:39:01,246 [c-39] DEBUG LMSIDACall - Header Name:Value pair: content-type:application/x-www-form-urlencoded
=== 2015-04-24 17:39:01,246 [c-39] DEBUG LMSIDACall - Header Name:Value pair: content-length:12274
=== 2015-04-24 17:39:01,246 [c-39] DEBUG LMSIDACall - session exists: REMOVED
=== 2015-04-24 17:39:01,246 [c-39] DEBUG LMSIDACall - remote user: csuperuser
=== 2015-04-24 17:39:01,249 [c-39] DEBUG RPCManager - Processing 1 requests.
=== 2015-04-24 17:39:01,249 [c-39] DEBUG RPCManager - Request #1 (RPCRequest) data: {
    appID:"isc_builtin",
    className:"builtin",
    methodName:"downloadClientExport",
    arguments:[
        [
            {
                STATUS_SHORTNAME:"Gepickt",
                leadAction:" ",
                STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
                STATUS_RESELLER_ID$style:{
                    rawValue:31
                },
                STATUS_USER_ID:"M. Unmüssig",
                STATUS_USER_ID$style:{
                    rawValue:1094
                },
                PICKED_DATE:"08.04.2015",
                PICKED_DATE$style:{
                    rawValue:new Date(1428504613000),
                    dateFormatter:"toEuropeanShortDate"
                },
                STATUS_STATUSDATE:" ",
                CUST_NAME_CONTACTPERSFULLNAME:"Hopsassa Gmbh (Günther Hopsassa)",
                CAMPAIGN_ID:"Hannover Messe 2015",
                CAMPAIGN_ID$style:{
                    rawValue:59
                },
                LEADTEMPERATURE_ID:"Hot Lead",
                LEADTEMPERATURE_ID$style:{
                    rawValue:17
                },
                LEADTYPE_ID:"Event",
                LEADTYPE_ID$style:{
                    rawValue:22
                },
                STATUS_POTREV_COMPANY:" ",
                STATUS_POTREV_PROJECT:" ",
                CREATED_BY:"K. Kowalski",
                CREATED_BY$style:{
                    rawValue:1083
                },
                CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
            },
            {
                STATUS_SHORTNAME:"Gepickt",
                leadAction:" ",
                STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
                STATUS_RESELLER_ID$style:{
                    rawValue:31
                },
                STATUS_USER_ID:"M. Unmüssig",
                STATUS_USER_ID$style:{
                    rawValue:1094
                },
                PICKED_DATE:"21.01.2015",
                PICKED_DATE$style:{
                    rawValue:new Date(1421830376000),
                    dateFormatter:"toEuropeanShortDate"
                },
                STATUS_STATUSDATE:" ",
                CUST_NAME_CONTACTPERSFULLNAME:"Test gmbh (Test)",
                CAMPAIGN_ID:"Kündiger-Reaktivierung",
                CAMPAIGN_ID$style:{
                    rawValue:50
                },
                LEADTEMPERATURE_ID:"Marketing qualified Lead",
                LEADTEMPERATURE_ID$style:{
                    rawValue:19
                },
                LEADTYPE_ID:" ",
                STATUS_POTREV_COMPANY:" ",
                STATUS_POTREV_PROJECT:" ",
                CREATED_BY:"K. Kowalski",
                CREATED_BY$style:{
                    rawValue:1083
                },
                CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
            },
            {
                STATUS_SHORTNAME:"Gepickt",
                leadAction:" ",
                STATUS_RESELLER_ID:"Top-Software Reseller UG (MS)",
                STATUS_RESELLER_ID$style:{
                    rawValue:26
                },
                STATUS_USER_ID:"S. Resch",
                STATUS_USER_ID$style:{
                    rawValue:1098
                },
                PICKED_DATE:"26.03.2015",
                PICKED_DATE$style:{
                    rawValue:new Date(1427368899000),
                    dateFormatter:"toEuropeanShortDate"
                },
                STATUS_STATUSDATE:" ",
                CUST_NAME_CONTACTPERSFULLNAME:"tmp Gmbh (Müller)",
                CAMPAIGN_ID:"Cebit Stand 2014",
                CAMPAIGN_ID$style:{
                    rawValue:51
                },
                LEADTEMPERATURE_ID:"Hot Lead",
                LEADTEMPERATURE_ID$style:{
                    rawValue:17
                },
                LEADTYPE_ID:"Trial DL",
                LEADTYPE_ID$style:{
                    rawValue:25
                },
                STATUS_POTREV_COMPANY:" ",
                STATUS_POTREV_PROJECT:" ",
                CREATED_BY:"K. Kowalski",
                CREATED_BY$style:{
                    rawValue:1083
                },
                CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
            },
            {
                STATUS_SHORTNAME:"Angebot",
                leadAction:" ",
                STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
                STATUS_RESELLER_ID$style:{
                    rawValue:31
                },
                STATUS_USER_ID:"M. Unmüssig",
                STATUS_USER_ID$style:{
                    rawValue:1094
                },
                PICKED_DATE:"30.03.2015",
                PICKED_DATE$style:{
                    rawValue:new Date(1427724435000),
                    dateFormatter:"toEuropeanShortDate"
                },
                STATUS_STATUSDATE:"30.04.2015",
                STATUS_STATUSDATE$style:{
                    rawValue:new Date(1430344800000),
                    dateFormatter:null
                },
                CUST_NAME_CONTACTPERSFULLNAME:"tmp gmbh (Heiko Wedemeyer)",
                CAMPAIGN_ID:"Cebit Stand 2014",
                CAMPAIGN_ID$style:{
                    rawValue:51
                },
                LEADTEMPERATURE_ID:"Hot Lead",
                LEADTEMPERATURE_ID$style:{
                    rawValue:17
                },
                LEADTYPE_ID:"Event",
                LEADTYPE_ID$style:{
                    rawValue:22
                },
                STATUS_POTREV_COMPANY:"2.000 €",
                STATUS_POTREV_COMPANY$style:{
                    rawValue:2000
                },
                STATUS_POTREV_PROJECT:" ",
                CREATED_BY:"K. Kowalski",
                CREATED_BY$style:{
                    rawValue:1083
                },
                CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
            }
        ],
        "ooxml",
        "picked_leads.xlsx",
        "download",
        {
            exportAs:"ooxml",
            exportDisplay:"download",
            exportFilename:"picked_leads.xlsx",
            exportPath:null,
            exportToClient:null,
            exportToFilesystem:null,
            exportDelimiter:null,
            exportFields:[
                "leadAction",
                "STATUS_RESELLER_ID",
                "STATUS_USER_ID",
                "PICKED_DATE",
                "STATUS_STATUSDATE",
                "CUST_NAME_CONTACTPERSFULLNAME",
                "CAMPAIGN_ID",
                "LEADTEMPERATURE_ID",
                "LEADTYPE_ID",
                "STATUS_POTREV_COMPANY",
                "STATUS_POTREV_PROJECT",
                "CREATED_BY",
                "CREATED_BY_LEGALENTITYNAME"
            ],
            exportHeader:null,
            exportHeaderless:null,
            exportFooter:null,
            exportTitleSeparatorChar:null,
            exportDefaultBGColor:null,
            exportAlternateRowBGColor:null,
            exportRowBGColors:{
            },
            exportColumnBGColors:{
            },
            exportRawValues:false,
            exportCurrencySymbol:"€",
            lineBreakStyle:null,
            exportOtherFields:{
                leadAction:"Aktionen",
                STATUS_RESELLER_ID:"Gepickt von Firma",
                STATUS_USER_ID:"Gepickt von Benutzer",
                PICKED_DATE:"Gepickt am",
                STATUS_STATUSDATE:"Statusdatum",
                CUST_NAME_CONTACTPERSFULLNAME:"Ansprechpartner",
                CAMPAIGN_ID:"Kampagne",
                LEADTEMPERATURE_ID:"Leadtemperatur",
                LEADTYPE_ID:"Leadtyp",
                STATUS_POTREV_COMPANY:"Anteil Kunde (netto)",
                STATUS_POTREV_PROJECT:"Umfang Gesamtprojekt (netto)",
                CREATED_BY:"Erst. v. (User)",
                CREATED_BY_LEGALENTITYNAME:"Erst. v. (Firma)"
            },
            exportWrapHeaderTitles:null
        }
    ],
    is_ISC_RPC_DMI:true
}
=== 2015-04-24 17:39:01,250 [c-39] INFO  LMSIDACall - Performing 1 operation(s)
=== 2015-04-24 17:39:01,258 [c-39] DEBUG RPCDMI - appConfig: isc.Application.create({
    rpcBindings:[
        {
            ID:"builtin",
            className:"com.isomorphic.rpc.BuiltinRPC",
            visibleMethods:[
                {
                    name:"downloadWSDL"
                },
                {
                    name:"downloadClientContent"
                },
                {
                    name:"downloadClientExport"
                },
                {
                    name:"xmlToJS"
                },
                {
                    name:"uploadProgressCheck"
                },
                {
                    name:"saveFile"
                },
                {
                    name:"appendToFile"
                },
                {
                    name:"loadFile"
                },
                {
                    name:"deleteFile"
                },
                {
                    name:"loadSharedXML"
                },
                {
                    name:"saveSharedXML"
                },
                {
                    name:"getAvailableScriptEngines"
                },
                {
                    name:"devConsoleEvalServerScript"
                },
                {
                    name:"evalJava"
                },
                {
                    name:"getLogNames"
                },
                {
                    name:"getLogEntries"
                },
                {
                    name:"clearLogEntries"
                },
                {
                    name:"getLogThresholds"
                },
                {
                    name:"setLogThreshold"
                },
                {
                    name:"setTemporaryLogThreshold"
                },
                {
                    name:"revertTemporaryLogThresholds"
                },
                {
                    name:"getPdfObject"
                },
                {
                    name:"exportImage"
                },
                {
                    name:"areServerTimingsTracked"
                },
                {
                    name:"trackServerTimings"
                }
            ]
        },
        {
            ID:"builtin_tools",
            className:"com.isomorphic.tools.BuiltinRPC",
            visibleMethods:[
                {
                    name:"getDataSourceFromTable"
                },
                {
                    name:"getDataSourceJSONFromTable"
                },
                {
                    name:"getDataSourceFromHibernateMapping"
                },
                {
                    name:"getDataSourceJSONFromHibernateMapping"
                },
                {
                    name:"getTables"
                },
                {
                    name:"getFieldsFromTable"
                },
                {
                    name:"getBeanFields"
                },
                {
                    name:"getHibernateBeans"
                },
                {
                    name:"getDatabaseProductNameAndVersion"
                },
                {
                    name:"getDatabaseTableTypes"
                },
                {
                    name:"setAttributes"
                },
                {
                    name:"clearAttributes"
                },
                {
                    name:"getAttributes"
                },
                {
                    name:"getAttribute"
                },
                {
                    name:"getDataSourceConfigFromJavaClass"
                },
                {
                    args:"cName",
                    language:"groovy",
                    name:"getJavaSource",
                    script:"\n                    if (!com.isomorphic.auth.DevModeAuthFilter.devModeAuthorized(request)) throw new Exception(\"Not Authorized\");                    \n                    //import org.apache.bcel.Repository;\n\n                    try {\n                        return org.apache.bcel.Repository.lookupClass(cName).toString();\n                    } catch (Throwable e) {\n                        return \"Unable to reverse engineer class \"+cName+\": \"+e.getMessage();\n                    }\n                "
                },
                {
                    name:"loadDataSource"
                },
                {
                    name:"dsFromXML"
                },
                {
                    name:"dsConfigFromXML"
                },
                {
                    name:"getDefinedDataSources"
                }
            ]
        },
        {
            ID:"builtin_adminconsole",
            className:"com.isomorphic.tools.AdminConsole",
            visibleMethods:[
                {
                    name:"getDefinedDatabases"
                },
                {
                    name:"testDB"
                },
                {
                    name:"saveDBConfig"
                },
                {
                    name:"setDefaultDB"
                },
                {
                    name:"importDataSources"
                },
                {
                    name:"discoverJNDIDatabases"
                }
            ]
        }
    ]
})

=== 2015-04-24 17:39:01,261 [c-39] INFO  BuiltinRPC - Export data passed to server:
[
    {
        STATUS_SHORTNAME:"Gepickt",
        leadAction:" ",
        STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
        STATUS_RESELLER_ID$style:{
            rawValue:31
        },
        STATUS_USER_ID:"M. Unmüssig",
        STATUS_USER_ID$style:{
            rawValue:1094
        },
        PICKED_DATE:"08.04.2015",
        PICKED_DATE$style:{
            rawValue:new Date(1428504613000),
            dateFormatter:"toEuropeanShortDate"
        },
        STATUS_STATUSDATE:" ",
        CUST_NAME_CONTACTPERSFULLNAME:"Hopsassa Gmbh (Günther Hopsassa)",
        CAMPAIGN_ID:"Hannover Messe 2015",
        CAMPAIGN_ID$style:{
            rawValue:59
        },
        LEADTEMPERATURE_ID:"Hot Lead",
        LEADTEMPERATURE_ID$style:{
            rawValue:17
        },
        LEADTYPE_ID:"Event",
        LEADTYPE_ID$style:{
            rawValue:22
        },
        STATUS_POTREV_COMPANY:" ",
        STATUS_POTREV_PROJECT:" ",
        CREATED_BY:"K. Kowalski",
        CREATED_BY$style:{
            rawValue:1083
        },
        CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
    },
    {
        STATUS_SHORTNAME:"Gepickt",
        leadAction:" ",
        STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
        STATUS_RESELLER_ID$style:{
            rawValue:31
        },
        STATUS_USER_ID:"M. Unmüssig",
        STATUS_USER_ID$style:{
            rawValue:1094
        },
        PICKED_DATE:"21.01.2015",
        PICKED_DATE$style:{
            rawValue:new Date(1421830376000),
            dateFormatter:"toEuropeanShortDate"
        },
        STATUS_STATUSDATE:" ",
        CUST_NAME_CONTACTPERSFULLNAME:"Test gmbh (Test)",
        CAMPAIGN_ID:"Kündiger-Reaktivierung",
        CAMPAIGN_ID$style:{
            rawValue:50
        },
        LEADTEMPERATURE_ID:"Marketing qualified Lead",
        LEADTEMPERATURE_ID$style:{
            rawValue:19
        },
        LEADTYPE_ID:" ",
        STATUS_POTREV_COMPANY:" ",
        STATUS_POTREV_PROJECT:" ",
        CREATED_BY:"K. Kowalski",
        CREATED_BY$style:{
            rawValue:1083
        },
        CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
    },
    {
        STATUS_SHORTNAME:"Gepickt",
        leadAction:" ",
        STATUS_RESELLER_ID:"Top-Software Reseller UG (MS)",
        STATUS_RESELLER_ID$style:{
            rawValue:26
        },
        STATUS_USER_ID:"S. Resch",
        STATUS_USER_ID$style:{
            rawValue:1098
        },
        PICKED_DATE:"26.03.2015",
        PICKED_DATE$style:{
            rawValue:new Date(1427368899000),
            dateFormatter:"toEuropeanShortDate"
        },
        STATUS_STATUSDATE:" ",
        CUST_NAME_CONTACTPERSFULLNAME:"tmp Gmbh (Müller)",
        CAMPAIGN_ID:"Cebit Stand 2014",
        CAMPAIGN_ID$style:{
            rawValue:51
        },
        LEADTEMPERATURE_ID:"Hot Lead",
        LEADTEMPERATURE_ID$style:{
            rawValue:17
        },
        LEADTYPE_ID:"Trial DL",
        LEADTYPE_ID$style:{
            rawValue:25
        },
        STATUS_POTREV_COMPANY:" ",
        STATUS_POTREV_PROJECT:" ",
        CREATED_BY:"K. Kowalski",
        CREATED_BY$style:{
            rawValue:1083
        },
        CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
    },
    {
        STATUS_SHORTNAME:"Angebot",
        leadAction:" ",
        STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
        STATUS_RESELLER_ID$style:{
            rawValue:31
        },
        STATUS_USER_ID:"M. Unmüssig",
        STATUS_USER_ID$style:{
            rawValue:1094
        },
        PICKED_DATE:"30.03.2015",
        PICKED_DATE$style:{
            rawValue:new Date(1427724435000),
            dateFormatter:"toEuropeanShortDate"
        },
        STATUS_STATUSDATE:"30.04.2015",
        STATUS_STATUSDATE$style:{
            rawValue:new Date(1430344800000),
            dateFormatter:null
        },
        CUST_NAME_CONTACTPERSFULLNAME:"tmp gmbh (Heiko Wedemeyer)",
        CAMPAIGN_ID:"Cebit Stand 2014",
        CAMPAIGN_ID$style:{
            rawValue:51
        },
        LEADTEMPERATURE_ID:"Hot Lead",
        LEADTEMPERATURE_ID$style:{
            rawValue:17
        },
        LEADTYPE_ID:"Event",
        LEADTYPE_ID$style:{
            rawValue:22
        },
        STATUS_POTREV_COMPANY:"2.000 €",
        STATUS_POTREV_COMPANY$style:{
            rawValue:2000
        },
        STATUS_POTREV_PROJECT:" ",
        CREATED_BY:"K. Kowalski",
        CREATED_BY$style:{
            rawValue:1083
        },
        CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
    }
]
=== 2015-04-24 17:39:01,263 [c-39] INFO  ProxyHttpServletResponse - content-disposition set to: attachment; fileName=picked_leads.xlsx - unwrapping response output stream (CompressionFilter)
=== 2015-04-24 17:39:01,263 [c-39] DEBUG ConfigParser - Matched var name: webRoot
=== 2015-04-24 17:39:01,264 [c-39] DEBUG ConfigParser - value after substitution: /usr/share/apache-tomcat-7.0.53/lms_test/test
=== 2015-04-24 17:39:01,264 [c-39] INFO  BuiltinRPC - Generating and streaming ooxml file...
=== 2015-04-24 17:39:02,952 [c-39] WARN  BuiltinRPC - Exception during export - continuing anyway to avoid sending the client to a blank screen
java.lang.NullPointerException
        at com.isomorphic.rpc.ExcelDataExport.writeExportObject(ExcelDataExport.java:1313)
        at com.isomorphic.rpc.DataExport.exportResultSet(DataExport.java:640)
        at com.isomorphic.rpc.DataExport.exportResultSet(DataExport.java:460)
        at com.isomorphic.rpc.BuiltinRPC.downloadClientExport(BuiltinRPC.java:850)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.isomorphic.base.Reflection.adaptArgsAndInvoke(Reflection.java:975)
        at com.isomorphic.base.Reflection.adaptArgsAndInvoke(Reflection.java:805)
        at com.isomorphic.rpc.RPCDMI.execute(RPCDMI.java:309)
        at com.isomorphic.rpc.RPCDMI.execute(RPCDMI.java:66)
        at com.isomorphic.rpc.RPCRequest.execute(RPCRequest.java:231)
        at com.isomorphic.servlet.IDACall.handleRPCRequest(IDACall.java:328)
        at com.isomorphic.servlet.IDACall.processRPCTransaction(IDACall.java:182)
        at com.lmscompany.lms.server.LMSIDACall.processRequest(LMSIDACall.java:40)
        at com.isomorphic.servlet.IDACall._processRequest(IDACall.java:117)
        at com.isomorphic.servlet.IDACall.doPost(IDACall.java:76)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
        at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:156)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:260)
        at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:83)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:193)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
=== 2015-04-24 17:39:02,953 [c-39] DEBUG RPCDMI - rpc returned data
2nd request (null pointer exception in com.isomorphic class):
Code:
=== 2015-04-24 17:39:03,616 [c-56] INFO  RequestContext - URL: '/test/lms/sc/IDACall', User-Agent: 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0': Moz (Gecko) with Accept-Encoding header
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: host:REMOVED
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: user-agent:Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: Accept-Language:de,en-US;q=0.7,en;q=0.3
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: Accept-Encoding:gzip, deflate
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: referer:REMOVED
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: cookie:JSESSIONID=REMOVED; isc_cState=ready; GLog=REMOVED
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: connection:keep-alive
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: content-type:application/x-www-form-urlencoded
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - Header Name:Value pair: content-length:12274
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - session exists: REMOVED
=== 2015-04-24 17:39:03,616 [c-56] DEBUG LMSIDACall - remote user: csuperuser
=== 2015-04-24 17:39:03,620 [c-56] DEBUG RPCManager - Processing 1 requests.
=== 2015-04-24 17:39:03,620 [c-56] DEBUG RPCManager - Request #1 (RPCRequest) data: {
    appID:"isc_builtin",
    className:"builtin",
    methodName:"downloadClientExport",
    arguments:[
        [
            {
                STATUS_SHORTNAME:"Gepickt",
                leadAction:" ",
                STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
                STATUS_RESELLER_ID$style:{
                    rawValue:31
                },
                STATUS_USER_ID:"M. Unmüssig",
                STATUS_USER_ID$style:{
                    rawValue:1094
                },
                PICKED_DATE:"08.04.2015",
                PICKED_DATE$style:{
                    rawValue:new Date(1428504613000),
                    dateFormatter:"toEuropeanShortDate"
                },
                STATUS_STATUSDATE:" ",
                CUST_NAME_CONTACTPERSFULLNAME:"Hopsassa Gmbh (Günther Hopsassa)",
                CAMPAIGN_ID:"Hannover Messe 2015",
                CAMPAIGN_ID$style:{
                    rawValue:59
                },
                LEADTEMPERATURE_ID:"Hot Lead",
                LEADTEMPERATURE_ID$style:{
                    rawValue:17
                },
                LEADTYPE_ID:"Event",
                LEADTYPE_ID$style:{
                    rawValue:22
                },
                STATUS_POTREV_COMPANY:" ",
                STATUS_POTREV_PROJECT:" ",
                CREATED_BY:"K. Kowalski",
                CREATED_BY$style:{
                    rawValue:1083
                },
                CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
            },
            {
                STATUS_SHORTNAME:"Gepickt",
                leadAction:" ",
                STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
                STATUS_RESELLER_ID$style:{
                    rawValue:31
                },
                STATUS_USER_ID:"M. Unmüssig",
                STATUS_USER_ID$style:{
                    rawValue:1094
                },
                PICKED_DATE:"21.01.2015",
                PICKED_DATE$style:{
                    rawValue:new Date(1421830376000),
                    dateFormatter:"toEuropeanShortDate"
                },
                STATUS_STATUSDATE:" ",
                CUST_NAME_CONTACTPERSFULLNAME:"Test gmbh (Test)",
                CAMPAIGN_ID:"Kündiger-Reaktivierung",
                CAMPAIGN_ID$style:{
                    rawValue:50
                },
                LEADTEMPERATURE_ID:"Marketing qualified Lead",
                LEADTEMPERATURE_ID$style:{
                    rawValue:19
                },
                LEADTYPE_ID:" ",
                STATUS_POTREV_COMPANY:" ",
                STATUS_POTREV_PROJECT:" ",
                CREATED_BY:"K. Kowalski",
                CREATED_BY$style:{
                    rawValue:1083
                },
                CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
            },
            {
                STATUS_SHORTNAME:"Gepickt",
                leadAction:" ",
                STATUS_RESELLER_ID:"Top-Software Reseller UG (MS)",
                STATUS_RESELLER_ID$style:{
                    rawValue:26
                },
                STATUS_USER_ID:"S. Resch",
                STATUS_USER_ID$style:{
                    rawValue:1098
                },
                PICKED_DATE:"26.03.2015",
                PICKED_DATE$style:{
                    rawValue:new Date(1427368899000),
                    dateFormatter:"toEuropeanShortDate"
                },
                STATUS_STATUSDATE:" ",
                CUST_NAME_CONTACTPERSFULLNAME:"tmp Gmbh (Müller)",
                CAMPAIGN_ID:"Cebit Stand 2014",
                CAMPAIGN_ID$style:{
                    rawValue:51
                },
                LEADTEMPERATURE_ID:"Hot Lead",
                LEADTEMPERATURE_ID$style:{
                    rawValue:17
                },
                LEADTYPE_ID:"Trial DL",
                LEADTYPE_ID$style:{
                    rawValue:25
                },
                STATUS_POTREV_COMPANY:" ",
                STATUS_POTREV_PROJECT:" ",
                CREATED_BY:"K. Kowalski",
                CREATED_BY$style:{
                    rawValue:1083
                },
                CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
            },
            {
                STATUS_SHORTNAME:"Angebot",
                leadAction:" ",
                STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
                STATUS_RESELLER_ID$style:{
                    rawValue:31
                },
                STATUS_USER_ID:"M. Unmüssig",
                STATUS_USER_ID$style:{
                    rawValue:1094
                },
                PICKED_DATE:"30.03.2015",
                PICKED_DATE$style:{
                    rawValue:new Date(1427724435000),
                    dateFormatter:"toEuropeanShortDate"
                },
                STATUS_STATUSDATE:"30.04.2015",
                STATUS_STATUSDATE$style:{
                    rawValue:new Date(1430344800000),
                    dateFormatter:null
                },
                CUST_NAME_CONTACTPERSFULLNAME:"tmp gmbh (Heiko Wedemeyer)",
                CAMPAIGN_ID:"Cebit Stand 2014",
                CAMPAIGN_ID$style:{
                    rawValue:51
                },
                LEADTEMPERATURE_ID:"Hot Lead",
                LEADTEMPERATURE_ID$style:{
                    rawValue:17
                },
                LEADTYPE_ID:"Event",
                LEADTYPE_ID$style:{
                    rawValue:22
                },
                STATUS_POTREV_COMPANY:"2.000 €",
                STATUS_POTREV_COMPANY$style:{
                    rawValue:2000
                },
                STATUS_POTREV_PROJECT:" ",
                CREATED_BY:"K. Kowalski",
                CREATED_BY$style:{
                    rawValue:1083
                },
                CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
            }
        ],
        "ooxml",
        "picked_leads.xlsx",
        "download",
        {
            exportAs:"ooxml",
            exportDisplay:"download",
            exportFilename:"picked_leads.xlsx",
            exportPath:null,
            exportToClient:null,
            exportToFilesystem:null,
            exportDelimiter:null,
            exportFields:[
                "leadAction",
                "STATUS_RESELLER_ID",
                "STATUS_USER_ID",
                "PICKED_DATE",
                "STATUS_STATUSDATE",
                "CUST_NAME_CONTACTPERSFULLNAME",
                "CAMPAIGN_ID",
                "LEADTEMPERATURE_ID",
                "LEADTYPE_ID",
                "STATUS_POTREV_COMPANY",
                "STATUS_POTREV_PROJECT",
                "CREATED_BY",
                "CREATED_BY_LEGALENTITYNAME"
            ],
            exportHeader:null,
            exportHeaderless:null,
            exportFooter:null,
            exportTitleSeparatorChar:null,
            exportDefaultBGColor:null,
            exportAlternateRowBGColor:null,
            exportRowBGColors:{
            },
            exportColumnBGColors:{
            },
            exportRawValues:false,
            exportCurrencySymbol:"€",
            lineBreakStyle:null,
            exportOtherFields:{
                leadAction:"Aktionen",
                STATUS_RESELLER_ID:"Gepickt von Firma",
                STATUS_USER_ID:"Gepickt von Benutzer",
                PICKED_DATE:"Gepickt am",
                STATUS_STATUSDATE:"Statusdatum",
                CUST_NAME_CONTACTPERSFULLNAME:"Ansprechpartner",
                CAMPAIGN_ID:"Kampagne",
                LEADTEMPERATURE_ID:"Leadtemperatur",
                LEADTYPE_ID:"Leadtyp",
                STATUS_POTREV_COMPANY:"Anteil Kunde (netto)",
                STATUS_POTREV_PROJECT:"Umfang Gesamtprojekt (netto)",
                CREATED_BY:"Erst. v. (User)",
                CREATED_BY_LEGALENTITYNAME:"Erst. v. (Firma)"
            },
            exportWrapHeaderTitles:null
        }
    ],
    is_ISC_RPC_DMI:true
}
=== 2015-04-24 17:39:03,620 [c-56] INFO  LMSIDACall - Performing 1 operation(s)
=== 2015-04-24 17:39:03,621 [c-56] DEBUG RPCDMI - appConfig: isc.Application.create({
    rpcBindings:[
        {
            ID:"builtin",
            className:"com.isomorphic.rpc.BuiltinRPC",
            visibleMethods:[
                {
                    name:"downloadWSDL"
                },
                {
                    name:"downloadClientContent"
                },
                {
                    name:"downloadClientExport"
                },
                {
                    name:"xmlToJS"
                },
                {
                    name:"uploadProgressCheck"
                },
                {
                    name:"saveFile"
                },
                {
                    name:"appendToFile"
                },
                {
                    name:"loadFile"
                },
                {
                    name:"deleteFile"
                },
                {
                    name:"loadSharedXML"
                },
                {
                    name:"saveSharedXML"
                },
                {
                    name:"getAvailableScriptEngines"
                },
                {
                    name:"devConsoleEvalServerScript"
                },
                {
                    name:"evalJava"
                },
                {
                    name:"getLogNames"
                },
                {
                    name:"getLogEntries"
                },
                {
                    name:"clearLogEntries"
                },
                {
                    name:"getLogThresholds"
                },
                {
                    name:"setLogThreshold"
                },
                {
                    name:"setTemporaryLogThreshold"
                },
                {
                    name:"revertTemporaryLogThresholds"
                },
                {
                    name:"getPdfObject"
                },
                {
                    name:"exportImage"
                },
                {
                    name:"areServerTimingsTracked"
                },
                {
                    name:"trackServerTimings"
                }
            ]
        },
        {
            ID:"builtin_tools",
            className:"com.isomorphic.tools.BuiltinRPC",
            visibleMethods:[
                {
                    name:"getDataSourceFromTable"
                },
                {
                    name:"getDataSourceJSONFromTable"
                },
                {
                    name:"getDataSourceFromHibernateMapping"
                },
                {
                    name:"getDataSourceJSONFromHibernateMapping"
                },
                {
                    name:"getTables"
                },
                {
                    name:"getFieldsFromTable"
                },
                {
                    name:"getBeanFields"
                },
                {
                    name:"getHibernateBeans"
                },
                {
                    name:"getDatabaseProductNameAndVersion"
                },
                {
                    name:"getDatabaseTableTypes"
                },
                {
                    name:"setAttributes"
                },
                {
                    name:"clearAttributes"
                },
                {
                    name:"getAttributes"
                },
                {
                    name:"getAttribute"
                },
                {
                    name:"getDataSourceConfigFromJavaClass"
                },
                {
                    args:"cName",
                    language:"groovy",
                    name:"getJavaSource",
                    script:"\n                    if (!com.isomorphic.auth.DevModeAuthFilter.devModeAuthorized(request)) throw new Exception(\"Not Authorized\");                    \n                    //import org.apache.bcel.Repository;\n\n                    try {\n                        return org.apache.bcel.Repository.lookupClass(cName).toString();\n                    } catch (Throwable e) {\n                        return \"Unable to reverse engineer class \"+cName+\": \"+e.getMessage();\n                    }\n                "
                },
                {
                    name:"loadDataSource"
                },
                {
                    name:"dsFromXML"
                },
                {
                    name:"dsConfigFromXML"
                },
                {
                    name:"getDefinedDataSources"
                }
            ]
        },
        {
            ID:"builtin_adminconsole",
            className:"com.isomorphic.tools.AdminConsole",
            visibleMethods:[
                {
                    name:"getDefinedDatabases"
                },
                {
                    name:"testDB"
                },
                {
                    name:"saveDBConfig"
                },
                {
                    name:"setDefaultDB"
                },
                {
                    name:"importDataSources"
                },
                {
                    name:"discoverJNDIDatabases"
                }
            ]
        }
    ]
})

=== 2015-04-24 17:39:03,622 [c-56] INFO  BuiltinRPC - Export data passed to server:
[
    {
        STATUS_SHORTNAME:"Gepickt",
        leadAction:" ",
        STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
        STATUS_RESELLER_ID$style:{
            rawValue:31
        },
        STATUS_USER_ID:"M. Unmüssig",
        STATUS_USER_ID$style:{
            rawValue:1094
        },
        PICKED_DATE:"08.04.2015",
        PICKED_DATE$style:{
            rawValue:new Date(1428504613000),
            dateFormatter:"toEuropeanShortDate"
        },
        STATUS_STATUSDATE:" ",
        CUST_NAME_CONTACTPERSFULLNAME:"Hopsassa Gmbh (Günther Hopsassa)",
        CAMPAIGN_ID:"Hannover Messe 2015",
        CAMPAIGN_ID$style:{
            rawValue:59
        },
        LEADTEMPERATURE_ID:"Hot Lead",
        LEADTEMPERATURE_ID$style:{
            rawValue:17
        },
        LEADTYPE_ID:"Event",
        LEADTYPE_ID$style:{
            rawValue:22
        },
        STATUS_POTREV_COMPANY:" ",
        STATUS_POTREV_PROJECT:" ",
        CREATED_BY:"K. Kowalski",
        CREATED_BY$style:{
            rawValue:1083
        },
        CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
    },
    {
        STATUS_SHORTNAME:"Gepickt",
        leadAction:" ",
        STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
        STATUS_RESELLER_ID$style:{
            rawValue:31
        },
        STATUS_USER_ID:"M. Unmüssig",
        STATUS_USER_ID$style:{
            rawValue:1094
        },
        PICKED_DATE:"21.01.2015",
        PICKED_DATE$style:{
            rawValue:new Date(1421830376000),
            dateFormatter:"toEuropeanShortDate"
        },
        STATUS_STATUSDATE:" ",
        CUST_NAME_CONTACTPERSFULLNAME:"Test gmbh (Test)",
        CAMPAIGN_ID:"Kündiger-Reaktivierung",
        CAMPAIGN_ID$style:{
            rawValue:50
        },
        LEADTEMPERATURE_ID:"Marketing qualified Lead",
        LEADTEMPERATURE_ID$style:{
            rawValue:19
        },
        LEADTYPE_ID:" ",
        STATUS_POTREV_COMPANY:" ",
        STATUS_POTREV_PROJECT:" ",
        CREATED_BY:"K. Kowalski",
        CREATED_BY$style:{
            rawValue:1083
        },
        CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
    },
    {
        STATUS_SHORTNAME:"Gepickt",
        leadAction:" ",
        STATUS_RESELLER_ID:"Top-Software Reseller UG (MS)",
        STATUS_RESELLER_ID$style:{
            rawValue:26
        },
        STATUS_USER_ID:"S. Resch",
        STATUS_USER_ID$style:{
            rawValue:1098
        },
        PICKED_DATE:"26.03.2015",
        PICKED_DATE$style:{
            rawValue:new Date(1427368899000),
            dateFormatter:"toEuropeanShortDate"
        },
        STATUS_STATUSDATE:" ",
        CUST_NAME_CONTACTPERSFULLNAME:"tmp Gmbh (Müller)",
        CAMPAIGN_ID:"Cebit Stand 2014",
        CAMPAIGN_ID$style:{
            rawValue:51
        },
        LEADTEMPERATURE_ID:"Hot Lead",
        LEADTEMPERATURE_ID$style:{
            rawValue:17
        },
        LEADTYPE_ID:"Trial DL",
        LEADTYPE_ID$style:{
            rawValue:25
        },
        STATUS_POTREV_COMPANY:" ",
        STATUS_POTREV_PROJECT:" ",
        CREATED_BY:"K. Kowalski",
        CREATED_BY$style:{
            rawValue:1083
        },
        CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
    },
    {
        STATUS_SHORTNAME:"Angebot",
        leadAction:" ",
        STATUS_RESELLER_ID:"ABC-Softwarehaus GmbH (B)",
        STATUS_RESELLER_ID$style:{
            rawValue:31
        },
        STATUS_USER_ID:"M. Unmüssig",
        STATUS_USER_ID$style:{
            rawValue:1094
        },
        PICKED_DATE:"30.03.2015",
        PICKED_DATE$style:{
            rawValue:new Date(1427724435000),
            dateFormatter:"toEuropeanShortDate"
        },
        STATUS_STATUSDATE:"30.04.2015",
        STATUS_STATUSDATE$style:{
            rawValue:new Date(1430344800000),
            dateFormatter:null
        },
        CUST_NAME_CONTACTPERSFULLNAME:"tmp gmbh (Heiko Wedemeyer)",
        CAMPAIGN_ID:"Cebit Stand 2014",
        CAMPAIGN_ID$style:{
            rawValue:51
        },
        LEADTEMPERATURE_ID:"Hot Lead",
        LEADTEMPERATURE_ID$style:{
            rawValue:17
        },
        LEADTYPE_ID:"Event",
        LEADTYPE_ID$style:{
            rawValue:22
        },
        STATUS_POTREV_COMPANY:"2.000 €",
        STATUS_POTREV_COMPANY$style:{
            rawValue:2000
        },
        STATUS_POTREV_PROJECT:" ",
        CREATED_BY:"K. Kowalski",
        CREATED_BY$style:{
            rawValue:1083
        },
        CREATED_BY_LEGALENTITYNAME:"OURCOMPANY TESTACCOUNT"
    }
]
=== 2015-04-24 17:39:03,622 [c-56] INFO  ProxyHttpServletResponse - content-disposition set to: attachment; fileName=picked_leads.xlsx - unwrapping response output stream (CompressionFilter)
=== 2015-04-24 17:39:03,622 [c-56] INFO  BuiltinRPC - Generating and streaming ooxml file...
=== 2015-04-24 17:39:03,623 [c-56] WARN  BuiltinRPC - Exception during export - continuing anyway to avoid sending the client to a blank screen
java.lang.NullPointerException
        at com.isomorphic.rpc.ExcelDataExport.writeExportObject(ExcelDataExport.java:1313)
        at com.isomorphic.rpc.DataExport.exportResultSet(DataExport.java:640)
        at com.isomorphic.rpc.DataExport.exportResultSet(DataExport.java:460)
        at com.isomorphic.rpc.BuiltinRPC.downloadClientExport(BuiltinRPC.java:850)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.isomorphic.base.Reflection.adaptArgsAndInvoke(Reflection.java:975)
        at com.isomorphic.base.Reflection.adaptArgsAndInvoke(Reflection.java:805)
        at com.isomorphic.rpc.RPCDMI.execute(RPCDMI.java:309)
        at com.isomorphic.rpc.RPCDMI.execute(RPCDMI.java:66)
        at com.isomorphic.rpc.RPCRequest.execute(RPCRequest.java:231)
        at com.isomorphic.servlet.IDACall.handleRPCRequest(IDACall.java:328)
        at com.isomorphic.servlet.IDACall.processRPCTransaction(IDACall.java:182)
        at com.lmscompany.lms.server.LMSIDACall.processRequest(LMSIDACall.java:40)
        at com.isomorphic.servlet.IDACall._processRequest(IDACall.java:117)
        at com.isomorphic.servlet.IDACall.doPost(IDACall.java:76)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
        at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:156)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:260)
        at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:83)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:193)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
=== 2015-04-24 17:39:03,624 [c-56] DEBUG RPCDMI - rpc returned data
I put both request logs in WinMerge - they are the same besides the timestamp. I don't know what happened here. For some seconds, other requests are processed normally, but then the logs are full of "java.lang.Exception: java.lang.OutOfMemoryError: PermGen space".
The two requests I have shown are the first ones in today's logs (after 17 hours) resulting in a Java exceptions - operations were normal before.

1st out of memory request:
Code:
=== 2015-04-24 17:40:08,380 [c-31] INFO  RequestContext - URL: '/test/lms/sc/IDACall', User-Agent: 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0': Moz (Gecko) with Accept-Encoding header
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: host:REMOVED
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: user-agent:Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: Accept-Language:de,en-US;q=0.7,en;q=0.3
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: Accept-Encoding:gzip, deflate
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: content-type:application/x-www-form-urlencoded; charset=UTF-8
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: referer:REMOVED
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: content-length:1059
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: cookie:JSESSIONID=REMOVED; isc_cState=ready; GLog=REMOVED
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: connection:keep-alive
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: pragma:no-cache
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - Header Name:Value pair: Cache-Control:no-cache
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - session exists: REMOVED
=== 2015-04-24 17:40:08,380 [c-31] DEBUG LMSIDACall - remote user: csuperuser
=== 2015-04-24 17:40:08,381 [c-31] DEBUG RPCManager - Processing 1 requests.
=== 2015-04-24 17:40:08,381 [c-31] DEBUG RPCManager - Request #1 (DSRequest) payload: {
    criteria:{
        ID:51
    },
    operationConfig:{
        dataSource:"T_CAMPAIGN",
        repo:null,
        operationType:"fetch",
        textMatchStyle:"exact"
    },
    componentId:"isc_AddEditLeadMasterdata_2_0",
    appID:"builtinApplication",
    operation:"fetchOwnAndOtherLECampaigns",
    oldValues:{
        ID:51
    }
}
=== 2015-04-24 17:40:08,381 [c-31] INFO  LMSIDACall - Performing 1 operation(s)
=== 2015-04-24 17:40:08,805 [c-31] WARN  DataSourceDMI - Failed to create serverObject using operation level config. Will try to use DataSource level config instead. Actual error: PermGen space
=== 2015-04-24 17:40:09,180 [c-31] WARN  RequestContext - dsRequest.execute() failed:
java.lang.Exception: java.lang.OutOfMemoryError: PermGen space
        at com.isomorphic.datasource.DataSourceDMI.execute(DataSourceDMI.java:246)
        at com.isomorphic.datasource.DataSourceDMI.execute(DataSourceDMI.java:64)
        at com.isomorphic.datasource.DSRequest.execute(DSRequest.java:2544)
        at com.isomorphic.servlet.IDACall.handleDSRequest(IDACall.java:220)
        at com.lmscompany.lms.server.LMSIDACall.handleDSRequest(LMSIDACall.java:75)
        at com.isomorphic.servlet.IDACall.processRPCTransaction(IDACall.java:185)
        at com.lmscompany.lms.server.LMSIDACall.processRequest(LMSIDACall.java:40)
        at com.isomorphic.servlet.IDACall._processRequest(IDACall.java:117)
        at com.isomorphic.servlet.IDACall.doPost(IDACall.java:76)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
        at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:156)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:260)
        at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:83)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:193)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.OutOfMemoryError: PermGen space
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2957)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1690)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:270)
        at com.isomorphic.base.Reflection.classForName(Reflection.java:139)
        at com.isomorphic.rpc.ServerObject.<init>(ServerObject.java:157)
        at com.isomorphic.rpc.ServerObject.<init>(ServerObject.java:70)
        at com.isomorphic.datasource.DataSourceDMI.execute(DataSourceDMI.java:236)
        at com.isomorphic.datasource.DataSourceDMI.execute(DataSourceDMI.java:64)
        at com.isomorphic.datasource.DSRequest.execute(DSRequest.java:2544)
        at com.isomorphic.servlet.IDACall.handleDSRequest(IDACall.java:220)
        at com.lmscompany.lms.server.LMSIDACall.handleDSRequest(LMSIDACall.java:75)
        at com.isomorphic.servlet.IDACall.processRPCTransaction(IDACall.java:185)
        at com.lmscompany.lms.server.LMSIDACall.processRequest(LMSIDACall.java:40)
        at com.isomorphic.servlet.IDACall._processRequest(IDACall.java:117)
        at com.isomorphic.servlet.IDACall.doPost(IDACall.java:76)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
        at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:156)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:260)
        at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:83)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
2nd out of memory request:
Code:
=== 2015-04-24 17:40:08,381 [c-50] INFO  RequestContext - URL: '/test/lms/sc/IDACall', User-Agent: 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0': Moz (Gecko) with Accept-Encoding header
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: host:REMOVED
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: user-agent:Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: Accept-Language:de,en-US;q=0.7,en;q=0.3
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: Accept-Encoding:gzip, deflate
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: content-type:application/x-www-form-urlencoded; charset=UTF-8
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: referer:REMOVED
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: content-length:1282
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: cookie:JSESSIONID=REMOVED; isc_cState=ready; GLog=REMOVED
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: connection:keep-alive
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: pragma:no-cache
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - Header Name:Value pair: Cache-Control:no-cache
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - session exists: REMOVED
=== 2015-04-24 17:40:08,381 [c-50] DEBUG LMSIDACall - remote user: csuperuser
=== 2015-04-24 17:40:09,181 [c-50] DEBUG RPCManager - Processing 1 requests.
=== 2015-04-24 17:40:09,181 [c-50] DEBUG RPCManager - Request #1 (DSRequest) payload: {
    criteria:{
        operator:"equals",
        fieldName:"LEAD_ID",
        value:85,
        _constructor:"AdvancedCriteria"
    },
    operationConfig:{
        dataSource:"V_LEAD_RESELLER_MATCH_ALL_RD",
        repo:null,
        operationType:"fetch",
        textMatchStyle:"exact"
    },
    appID:"builtinApplication",
    operation:"countPossibleResellers",
    oldValues:{
        operator:"equals",
        fieldName:"LEAD_ID",
        value:85,
        _constructor:"AdvancedCriteria"
    }
}
=== 2015-04-24 17:40:09,181 [c-50] INFO  LMSIDACall - Performing 1 operation(s)
=== 2015-04-24 17:40:09,688 [c-50] WARN  RequestContext - dsRequest.execute() failed:
java.lang.OutOfMemoryError: PermGen space
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2957)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1690)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
        at com.isomorphic.datasource.DSRequest.convertMapOfStringToMapOfSummaryFunctionType(DSRequest.java:642)
        at com.isomorphic.datasource.DSRequest.buildSummaryFields(DSRequest.java:1648)
        at com.isomorphic.datasource.DSRequest.buildFieldData(DSRequest.java:3053)
        at com.isomorphic.datasource.DSRequest.execute(DSRequest.java:2392)
        at com.isomorphic.servlet.IDACall.handleDSRequest(IDACall.java:220)
        at com.lmscompany.lms.server.LMSIDACall.handleDSRequest(LMSIDACall.java:75)
        at com.isomorphic.servlet.IDACall.processRPCTransaction(IDACall.java:185)
        at com.lmscompany.lms.server.LMSIDACall.processRequest(LMSIDACall.java:40)
        at com.isomorphic.servlet.IDACall._processRequest(IDACall.java:117)
        at com.isomorphic.servlet.IDACall.doPost(IDACall.java:76)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
        at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:156)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:260)
        at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:83)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610)
3rd out of memory request:
Code:
=== 2015-04-24 17:40:19,249 [c-54] INFO  RequestContext - URL: '/test/lms/sc/IDACall', User-Agent: 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0': Moz (Gecko) with Accept-Encoding header
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: host:REMOVED
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: user-agent:Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: Accept-Language:de,en-US;q=0.7,en;q=0.3
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: Accept-Encoding:gzip, deflate
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: content-type:application/x-www-form-urlencoded; charset=UTF-8
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: referer:REMOVED
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: content-length:1566
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: cookie:JSESSIONID=REMOVED; isc_cState=ready; GLog=REMOVED
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: connection:keep-alive
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: pragma:no-cache
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - Header Name:Value pair: Cache-Control:no-cache
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - session exists: REMOVED
=== 2015-04-24 17:40:19,249 [c-54] DEBUG LMSIDACall - remote user: csuperuser
=== 2015-04-24 17:40:19,251 [c-54] DEBUG RPCManager - Processing 1 requests.
=== 2015-04-24 17:40:19,251 [c-54] DEBUG RPCManager - Request #1 (DSRequest) payload: {
    criteria:{
        operator:"equals",
        fieldName:"LEAD_ID",
        value:85,
        _constructor:"AdvancedCriteria"
    },
    operationConfig:{
        dataSource:"V_LEAD_STATUS_HISTORY",
        repo:null,
        operationType:"fetch",
        textMatchStyle:"exact"
    },
    startRow:0,
    endRow:75,
    sortBy:[
        "-CHANGENUMBER"
    ],
    componentId:"isc_ShowLeadHistoryStatus_1_0",
    appID:"builtinApplication",
    operation:"V_LEAD_STATUS_HISTORY_fetch",
    oldValues:{
        operator:"equals",
        fieldName:"LEAD_ID",
        value:85,
        _constructor:"AdvancedCriteria"
    }
}
=== 2015-04-24 17:40:19,251 [c-54] INFO  LMSIDACall - Performing 1 operation(s)
=== 2015-04-24 17:40:19,770 [c-54] WARN  DataSourceDMI - Failed to create serverObject using operation level config. Will try to use DataSource level config instead. Actual error: PermGen space
=== 2015-04-24 17:40:20,161 [c-54] WARN  RequestContext - dsRequest.execute() failed:
java.lang.Exception: java.lang.OutOfMemoryError: PermGen space
        at com.isomorphic.datasource.DataSourceDMI.execute(DataSourceDMI.java:246)
        at com.isomorphic.datasource.DataSourceDMI.execute(DataSourceDMI.java:64)
        at com.isomorphic.datasource.DSRequest.execute(DSRequest.java:2544)
        at com.isomorphic.servlet.IDACall.handleDSRequest(IDACall.java:220)
        at com.lmscompany.lms.server.LMSIDACall.handleDSRequest(LMSIDACall.java:75)
        at com.isomorphic.servlet.IDACall.processRPCTransaction(IDACall.java:185)
        at com.lmscompany.lms.server.LMSIDACall.processRequest(LMSIDACall.java:40)
        at com.isomorphic.servlet.IDACall._processRequest(IDACall.java:117)
        at com.isomorphic.servlet.IDACall.doPost(IDACall.java:76)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
        at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:156)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at com.isomorphic.servlet.CompressionFilter._doFilter(CompressionFilter.java:260)
        at com.isomorphic.servlet.BaseFilter.doFilter(BaseFilter.java:83)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:193)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.OutOfMemoryError: PermGen space
=== 2015-04-24 17:40:20,289 [c-54] DEBUG RPCManager - Content type for RPC transaction: text/plain; charset=UTF-8
=== 2015-04-24 17:40:20,289 [c-54] DEBUG RPCManager - non-DMI response, dropExtraFields: false
=== 2015-04-24 17:40:20,290 [c-54] INFO  Compression - /test/lms/sc/IDACall: 177 -> 158 bytes
and so on.

I restarted Tomcat after noticing, which stopped the exceptions for me. Also, I'm running many instances of the application under different Tomcat server.xml <Host>-tags. It seems, the other hosts were not affected by the error.
I can provide full logs via email, if needed. I don't have any linux memory listings from before the exception but can provide all needed current RAM usage and configurations parameters.

Does this (java.lang.NullPointerException at com.isomorphic.rpc.ExcelDataExport.writeExportObject(ExcelDataExport.java:1313)) look like a possible bug?

Best regards
Blama
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