I had the same problem.
Now I use the following on an Ubuntu machine.
 >>>>
# Arguments to pass to the Java virtual machine (JVM).
JAVA_OPTS="-Djava.awt.headless=true -Xms512m -Xmx1024m 
-XX:MaxPermSize=512m -XX:+CMSClassUnloadingEnabled 
-XX:+CMSPermGenSweepingEnabled"
 >>>>


On 23/07/2010 11:47, Brouns, Francis wrote:
> Hi,
>
> Last week we completed the upgrade of our DSpace 1.4.2 instance to DSpace 
> 1.5.2, but now are encountering lots of memory problems, which we did not 
> encounter on our test server.
>
> DSpace is installed on a SLES11 server, the Oracle database is located at a 
> different machine. We are running Tomcat6 (installed via Yast) and Sun Java 
> 1.5 (installed via RPM). We run the daily-digest, filter-media and the stats 
> cronjob. Apart from DSpace no other applications are running on this server. 
> We now assigned 6GB RAM to the server, and increased java_opts to Xmx1024. In 
> addition, Tomcat is restarted every night. At first this seemed to help, but 
> we are still running into memory errors.
>
> On our previous production server we also encountered these kind of problems, 
> but could solve them by adding additional RAM to the server, increasing 
> heapsize in java_opts and restarting tomcat every night. This time this does 
> not prevent the errors.
>
> Any tips on where I should look at to figure out what is causing this, are 
> welcome.
>
> Exception:
> javax.servlet.ServletException: java.lang.OutOfMemoryError: Java heap space
>       at 
> org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:852)
>       at 
> org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
>       at org.apache.jsp.index_jsp._jspService(index_jsp.java:137)
>       at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
>       at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>       at 
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
>       at 
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
>       at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
>       at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>       at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>       at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>       at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
>       at 
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>       at 
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>       at 
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
>       at 
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
>       at 
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
>       at 
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>       at java.lang.Thread.run(Thread.java:595)
> Caused by: java.lang.OutOfMemoryError: Java heap space
>
> Kind regards,
> Francis Brouns
>
>
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-- 
Hilton Gibson
Systems Administrator
JS Gericke Library Room 1025D
Stellenbosch University
Private Bag X5036
Stellenbosch
7599
South Africa

Tel: +27 21 808 4100 | Cell: +27 84 646 4758


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