[Building Sakai] Production Sakai 2.7.0 deadlocks
Aaron Zeckoski
azeckoski at unicon.net
Wed Aug 4 05:55:15 PDT 2010
Or you could try upgrading DBCP to a current version like 1.3.
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.3</version>
</dependency>
-AZ
On Wed, Aug 4, 2010 at 7:32 AM, Stephen Marquard
<stephen.marquard at uct.ac.za> wrote:
> Hi David,
>
> The "GregorSama" message is just a side-effect of some garbage
> collection taking place, and is probably unrelated to your problem.
>
> http://thedailywtf.com/Articles/Who_is_Gregor_Samsa_0x3f_.aspx
>
> You might have run into a dbcp issue. Switching to c3p0 might solve it,
> or adjusting the number of db connections allowed and/or the Oracle
> config. The problem and results seem to be Oracle-specific so I will
> defer to all our talented Oracle DBAs out there to give you better
> advice :-)
>
> Regards
> Stephen
>
>>>> David Barroso <david at asic.udl.cat> 8/4/2010 12:50 PM >>>
> Hi all,
>
> We have a Sakai 2.7.0 instance in production using
> Oracle 10g, Java1.6 and Linux.
>
> When a high level of sessions is reached, the
> java garbage collector starts working and the
> following error is shown in catalina.out
>
> Once the GregorSamsa class is unloaded and the
> java.lang.IndexOutOfBoundsException appears,
> the servers enters in a deadlock, waiting for
> database connections
>
> org.apache.commons.dbcp.SQLNestedException: Cannot get a connection,
> pool error Timeout waiting for idle object
> Caused by: java.util.NoSuchElementException: Timeout waiting for idle
> object
>
> We have found Oracle and Tomcat bug reports
> talking about this, but in very old versions.
>
> Any idea or clue to solve this problem ?
>
> I've been watching the nightly2 oracle instance and
> the Unloading class GregorSamsa appears at the end
> of the catalina.out log.
>
> http://nightly2.sakaiproject.org/logs/tomcat-nightly-oracle/
>
> Regards,
>
>
> -------------
> our catalina.out
>
> [Unloading class GregorSamsa]
> [Unloading class GregorSamsa$2]
> [Unloading class GregorSamsa$0]
> [Unloading class GregorSamsa]
> [Unloading class GregorSamsa$4]
> [Unloading class GregorSamsa$0]
> [Unloading class GregorSamsa]
> [Unloading class GregorSamsa]
> [Unloading class GregorSamsa$2]
> [Unloading class GregorSamsa$3]
> [Unloading class GregorSamsa$4]
> [Unloading class GregorSamsa$1]
> 2010-08-04 12:17:07,075 WARN TP-Processor17
> org.apache.myfaces.application.jsp.JspViewHandlerImpl - no faces
> servlet
> mappings found
> 2010-08-04 12:17:08,841 INFO TP-Processor10
> org.apache.myfaces.shared_impl.config.MyfacesConfig - Tomahawk jar not
>
> available. Autoscrolling, DetectJavascript, AddResourceClass and
> CheckExtensionsFilter are disabled now.
> 2010-08-04 12:17:08,841 INFO TP-Processor10
> org.apache.myfaces.shared_impl.config.MyfacesConfig - Starting up
> Tomahawk on the MyFaces-JSF-Implementation
> 2010-08-04 12:17:12,435 ERROR http-8080-Processor61
> org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/sakai-site-manage-tool].[sakai.membership]
>
> - Servlet.service() for servlet sakai.membership threw exception
> java.lang.ArrayIndexOutOfBoundsException: -31
> at
> sun.util.calendar.BaseCalendar.getCalendarDateFromFixedDate(BaseCalendar.java:436)
> at
> java.util.GregorianCalendar.computeFields(GregorianCalendar.java:2081)
> at
> java.util.GregorianCalendar.computeTime(GregorianCalendar.java:2472)
> at java.util.Calendar.updateTime(Calendar.java:2468)
> at java.util.Calendar.getTimeInMillis(Calendar.java:1087)
> at
> oracle.jdbc.driver.DateTimeCommonAccessor.getTimestamp(DateTimeCommonAccessor.java:256)
> at
> oracle.jdbc.driver.OracleResultSetImpl.getTimestamp(OracleResultSetImpl.java:1644)
> at
> org.apache.commons.dbcp.DelegatingResultSet.getTimestamp(DelegatingResultSet.java:548)
> at
> org.sakaiproject.site.impl.DbSiteService$DbStorage.readSqlResultRecord(DbSiteService.java:2128)
> at
> org.sakaiproject.db.impl.BasicSqlService.dbRead(BasicSqlService.java:564)
> at
> org.sakaiproject.db.impl.BasicSqlService.dbRead(BasicSqlService.java:464)
> at
> org.sakaiproject.util.BaseDbFlatStorage.getSelectedResources(BaseDbFlatStorage.java:470)
> at
> org.sakaiproject.site.impl.DbSiteService$DbStorage.getSites(DbSiteServicejava:782)
> at
> org.sakaiproject.site.impl.BaseSiteService.getSites(BaseSit
> eService.java:1616)
> at
> org.sakaiproject.site.cover.SiteService.getSites(SiteService.java:400)
> at
> org.sakaiproject.site.tool.MembershipAction.sizeResources(MembershipAction.java:85)
> at
> org.sakaiproject.cheftool.PagedResourceActionII.prepPage(PagedResourceActionII.java:270)
> at
> org.sakaiproject.site.tool.MembershipAction.buildMainPanelContext(MembershipAction.java:196)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.sakaiproject.cheftool.VelocityPortletPaneledAction.toolModeDispatch(VelocityPortletPaneledAction.java:398)
> at
> org.sakaiproject.cheftool.ToolServlet.doGet(ToolServlet.java:236)
> at
> org.sakaiproject.cheftool.VelocityPortletPaneledAction.doGet(VelocityPortletPaneledAction.java:1029)
> at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
> at
> org.sakaiproject.vm.ComponentServlet.service(ComponentServlet.java:56)
> at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
> 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:580)
> 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(ApplicationDispatcherjava:659)
> at
> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:457)
> at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:359)
> at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
> at
> org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:500)
> at
> org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1216)
> at
> org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:204)
> at
> org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:96)
> at
> org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:768)
>
>
> --
> David Barroso Iglesias david at asic.udl.cat
> =====================
> Universitat de Lleida
> Àrea de sistemes d'Informació i Comunicacions
> Cap de projectes interns
>
> University of Lleida
> Information and Communication Systems Service
> Internal project manager
>
> Tlf: +34 973 702040
> Fax: +34 973 702130
> =====================
>
> _______________________________________________
> 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"
>
>
>
>
>
> ###
> UNIVERSITY OF CAPE TOWN
>
> This e-mail is subject to the UCT ICT policies and e-mail disclaimer
> published on our website at
> http://www.uct.ac.za/about/policies/emaildisclaimer/ or obtainable from
> +27 21 650 4500. This e-mail is intended only for the person(s) to whom
> it is addressed. If the e-mail has reached you in error, please notify
> the author. If you are not the intended recipient of the e-mail you may
> not use, disclose, copy, redirect or print the content. If this e-mail
> is not related to the business of UCT it is sent by the sender in the
> sender's individual capacity.
>
> ###
>
> _______________________________________________
> 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"
--
Aaron Zeckoski - Software Engineer - http://tinyurl.com/azprofile
More information about the sakai-dev
mailing list