[Building Sakai] Announcements: java.lang.OutOfMemoryError

Mustansar Mehmood mustansar at rice.edu
Thu Jul 15 07:07:18 PDT 2010 

As far as memory leak is concerned I think tomcat 5.5.29 covers a lot of 
ground there.
in terms of adding more RAM is concerned it depends on your concuurent 
user count and how much RAM you have at the moment
I hope some one from announcement team can pitch to help as they might 
know does announce tool works in terms of creating separate threads when 
multicasting the announcements. I have CC'ed the project lead on 
announcements.
./mustansar
On 07/15/2010 08:36 AM, Mustansar Mehmood wrote:
> What version of Sakai, Java and tomcat are you running ?
> On 07/15/2010 08:22 AM, Yzelle, Sonette wrote:
>> This message (and attachments) is subject to restrictions and a 
>> disclaimer. Please refer to http://www.unisa.ac.za/disclaimer for 
>> full details.
>> ------------------------------------------------------------------------
>>
>> Good day,
>>
>> When we try to send out an announcement to 15000 students with 3 
>> attachments we get the error below?
>>
>> Has anyone else experienced something similar with announcements?
>>
>> We have googled and see that it is VM that is not enough and that we 
>> might have a memory leak?
>>
>> When we send announcements to smaller groups (with attachments) of 
>> students there is no error.
>>
>> We would appreciate your input on whether we must increase our VM 
>> memory or if you think there might be a problem with the way threads 
>> are opened and closed?
>>
>> Thanking you in advance.
>>
>> Regards
>>
>> Sonette
>>
>> This information will automatically be included in your bug report.
>>
>> org.sakaiproject.portal.api.PortalHandlerException: 
>> org.sakaiproject.tool.api.ToolException
>>
>>     at 
>> org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:768)
>>
>> caused by: org.sakaiproject.tool.api.ToolException
>>
>>     at org.sakaiproject.cheftool.ToolServlet.doGet(ToolServlet.java:227)
>>
>> caused by: java.lang.reflect.InvocationTargetException
>>
>>     at 
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>
>> caused by: java.lang.OutOfMemoryError: unable to create new native thread
>>
>>     at java.lang.Thread.start0(Native Method)
>>
>>     at java.lang.Thread.start(Thread.java:574)
>>
>>     at com.sun.jndi.ldap.Connection.<init>(Connection.java:212)
>>
>>     at com.sun.jndi.ldap.LdapClient.<init>(LdapClient.java:118)
>>
>>     at com.sun.jndi.ldap.LdapClient.getInstance(LdapClient.java:1578)
>>
>>     at com.sun.jndi.ldap.LdapCtx.connect(LdapCtx.java:2605)
>>
>>     at com.sun.jndi.ldap.LdapCtx.<init>(LdapCtx.java:284)
>>
>>     at 
>> com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(LdapCtxFactory.java:175)
>>
>>     at 
>> com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(LdapCtxFactory.java:193)
>>
>>     at 
>> com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(LdapCtxFactory.java:136)
>>
>>     at 
>> com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(LdapCtxFactory.java:66)
>>
>>     at 
>> javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:667)
>>
>>     at 
>> javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)
>>
>>     at javax.naming.InitialContext.init(InitialContext.java:223)
>>
>>     at 
>> javax.naming.ldap.InitialLdapContext.<init>(InitialLdapContext.java:134)
>>
>>     at 
>> za.ac.unisa.lms.providers.user.ad.StudentDirectoryProvider.getGCCtx(StudentDirectoryProvider.java:349)
>>
>>     at 
>> za.ac.unisa.lms.providers.user.ad.ADDirectoryProvider.findUser(ADDirectoryProvider.java:234)
>>
>>     at 
>> za.ac.unisa.lms.providers.user.ad.ADDirectoryProvider.findUserDn(ADDirectoryProvider.java:299)
>>
>>     at 
>> za.ac.unisa.lms.providers.user.ad.ADDirectoryProvider.userExists(ADDirectoryProvider.java:461)
>>
>>     at 
>> za.ac.unisa.lms.providers.user.UNISADirectoryProvider.getDisplayName(UNISADirectoryProvider.java:214)
>>
>>     at 
>> org.sakaiproject.user.impl.BaseUserDirectoryService$BaseUserEdit.getDisplayName(BaseUserDirectoryService.java:2179)
>>
>>     at 
>> org.sakaiproject.announcement.tool.AnnouncementAction$AnnouncementWrapper.<init>(AnnouncementAction.java:427)
>>
>>     at 
>> org.sakaiproject.announcement.tool.AnnouncementAction$AnnouncementWrapper.wrapList(AnnouncementAction.java:676)
>>
>>     at 
>> org.sakaiproject.announcement.tool.AnnouncementAction$AnnouncementWrapper.access$400(AnnouncementAction.java:355)
>>
>>     at 
>> org.sakaiproject.announcement.tool.AnnouncementAction.getMessages(AnnouncementAction.java:1470)
>>
>>     at 
>> org.sakaiproject.announcement.tool.AnnouncementAction.buildMainPanelContext(AnnouncementAction.java:906)
>>
>>     at sun.reflect.GeneratedMethodAccessor1014.invoke(null:-1)
>>
>>     at 
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>
>>     at java.lang.reflect.Method.invoke(Method.java:585)
>>
>>     at 
>> org.sakaiproject.cheftool.VelocityPortletPaneledAction.toolModeDispatch(VelocityPortletPaneledAction.java:401)
>>
>>     at org.sakaiproject.cheftool.ToolServlet.doGet(ToolServlet.java:227)
>>
>>     at 
>> org.sakaiproject.cheftool.VelocityPortletPaneledAction.doGet(VelocityPortletPaneledAction.java:1014)
>>
>>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>>
>>     at 
>> org.sakaiproject.vm.ComponentServlet.service(ComponentServlet.java:56)
>>
>>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>>
>>     at 
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
>>
>>     at 
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
>>
>>     at 
>> org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:565)
>>
>>     at 
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
>>
>>     at 
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
>>
>>     at 
>> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
>>
>>     at 
>> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461)
>>
>>     at 
>> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:364)
>>
>>     at 
>> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
>>
>>     at 
>> org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:486)
>>
>>     at 
>> org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1216)
>>
>>     at 
>> org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:188)
>>
>>     at 
>> org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:93)
>>
>>     at 
>> org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:768)
>>
>>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>>
>>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>>
>>     at 
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
>>
>>     at 
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
>>
>>     at 
>> org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:616)
>>
>>     at 
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
>>
>>     at 
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
>>
>>     at 
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
>>
>>     at 
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
>>
>>     at 
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>>
>>     at 
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
>>
>>     at 
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
>>
>>     at 
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
>>
>>     at 
>> org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
>>
>>     at 
>> org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
>>
>>     at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
>>
>>     at 
>> org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
>>
>>     at 
>> org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895)
>>
>>     at 
>> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
>>
>>     at java.lang.Thread.run(Thread.java:595)
>>
>> user: bfab32cb-2ab9-46c6-80e4-ee7664cbabf4
>>
>> usage-session: a5ae0727-081d-44a4-a1a4-a7faf90c683f
>>
>> time: 12-Jul-2010 08:37:54
>>
>> *Klarissa Engelbrecht*
>>
>> *Module Leader EUP1501*
>>
>> End-user Computing Practical Tuition Team
>>
>> School of Computing
>>
>> College of Science, Engineering and Technology
>>
>> Tel.: +27 12 429 6878/6653
>>
>> Unisa-email-signature
>>
>>
>> _______________________________________________
>> sakai-dev mailing list
>> sakai-dev at collab.sakaiproject.org
>> http://collab.sakaiproject.org/mailman/listinfo/sakai-dev
>>
>> TO UNSUBSCRIBE: send email tosakai-dev-unsubscribe at collab.sakaiproject.org  with a subject of "unsubscribe"
>
>
> -- 
> Mustansar Mehmood
> Educational System Developer&  Integrator
>
> Information Technology
> 6100 Main St. MS 119
> Houston Texas 77005
>
> Phone:(713)348-2523
> Fax  :(713)348 6099
> email:mustansar at rice.edu
>
>
>
>
>
> I have yet to see any problem, however complicated, which, when,you  looked at it in the right way, did not become still more complicated.
>      -- Poul Anderson
>
>    
>
>
> _______________________________________________
> sakai-dev mailing list
> sakai-dev at collab.sakaiproject.org
> http://collab.sakaiproject.org/mailman/listinfo/sakai-dev
>
> TO UNSUBSCRIBE: send email to sakai-dev-unsubscribe at collab.sakaiproject.org with a subject of "unsubscribe"


-- 
Mustansar Mehmood
Educational System Developer&  Integrator

Information Technology
6100 Main St. MS 119
Houston Texas 77005

Phone:(713)348-2523
Fax  :(713)348 6099
email:mustansar at rice.edu





I have yet to see any problem, however complicated, which, when,you  looked at it in the right way, did not become still more complicated.
     -- Poul Anderson


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