OutOfMemory problem

From: Lothar Krenzien (lkrenzie..eb.de)
Date: Mon Oct 24 2005 - 05:49:58 EDT

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    Hi there,

    I'm using cayenne (don't know which version) with Java 5 and Tomcat 5.5 in a servlet environment to access a MS SQL 2000 database over a LAN network. The servlets takes a xml files as input and calls a SQL procedure which takes the file as argument, parse the file and write the content into the database. The procedure uses a cursor so I think, the execution time of that procedure is not the best.

    Some times, mostly at weekend, the servlet is very heavenly called. A lot of files are posted and also a lot database queries are made. After a while I get an OutOfMemory exception in Java and I have to restart Tomcat. Of course I'm not sure, if is it a cayenne probleme. But maybe someone else had have this problem or know of it.

    Here's an except of the tomcat log:

    2005-10-23 04:42:54,109 [DEBUG] org.objectstyle.cayenne.event.EventManager.Event dispatch error, ignoring.
    java.lang.OutOfMemoryError: Java heap space

    2005-10-23 04:51:59,343 [ERROR] struts.actions.portal.OutputGenAction.callFormEventMethod: Error calling: efbChartGenEvent>
            at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    Caused by: java.lang.OutOfMemoryError: Java heap space

    I see also a lot of database exceptions:

    2005-10-23 01:50:26,390 [ERROR] org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/DataLoggerGate].Servlet.service() for servlet DataLoggerGate threw exception
    base.exception.SystemErrorException: :
            at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
            at com.microsoft.jdbc.sqlserver.tds.TDSRequest.processErrorToken(Unknown Source)

    2005-10-23 01:50:27,921 [INFO ] org.objectstyle.cayenne.access.QueryLogger.*** error.
            at com.microsoft.jdbc.sqlserver.tds.TDSRequest.processErrorToken(Unknown Source)
            at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)

    2005-10-23 01:50:27,921 [ERROR] DataLoggerGate.doPost: >
    base.exception.SystemErrorException: :
            at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
            at com.microsoft.jdbc.sqlserver.tds.TDSRequest.processErrorToken(Unknown Source)

    Thanks for any suggestion
    Lothar

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