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CLOSED  Bug report JPPF-95  -  ConcurrentModificationException in DriverJobManagement.getAllJobIds()
Posted Nov 02, 2012 - updated Mar 21, 2019
icon_info.png This issue has been closed with status "Closed" and resolution "RESOLVED".
Issue details
  • Type of issue
    Bug report
  • Status
     
    		 Closed
  • Assigned to
    lolo4j
  • Progress
       
  • Type of bug
    Not triaged
  • Likelihood
    Not triaged
  • Effect
    Not triaged
  • Posted by
    lolo4j
  • Owned by
    Not owned by anyone
  • Category
    Management / Monitoring
  • Resolution
    RESOLVED
  • Priority
    Normal
  • Reproducability
    Not determined
  • Severity
    Normal
  • Targetted for
    icon_milestones.png JPPF 5.1.x
Issue description
The following stack trace can be oserved in the driver's log: 

javax.management.RuntimeMBeanException: java.util.ConcurrentModificationException
  at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:856)
  at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrowMaybeMBeanException(DefaultMBeanServerInterceptor.java:869)
  at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:670)
  at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638)
  at javax.management.remote.generic.ServerIntermediary.handleRequest(ServerIntermediary.java:222)
  at javax.management.remote.generic.ServerIntermediary$PrivilegedRequestJob.run(ServerIntermediary.java:951)
  at java.security.AccessController.doPrivileged(Native Method)
  at javax.management.remote.generic.ServerIntermediary$RequestHandler.handleMBSReqMessage(ServerIntermediary.java:727)
  at javax.management.remote.generic.ServerIntermediary$RequestHandler.execute(ServerIntermediary.java:629)
  at com.sun.jmx.remote.generic.ServerSynchroMessageConnectionImpl$RemoteJob.run(ServerSynchroMessageConnectionImpl.java:266)
  at com.sun.jmx.remote.opt.util.ThreadService$ThreadServiceJob.run(ThreadService.java:208)
  at com.sun.jmx.remote.opt.util.JobExecutor.run(JobExecutor.java:59)
Caused by: java.util.ConcurrentModificationException
  at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
  at java.util.HashMap$KeyIterator.next(HashMap.java:828)
  at java.util.AbstractCollection.toArray(AbstractCollection.java:171)
  at java.util.Collections$UnmodifiableCollection.toArray(Collections.java:1002)
  at org.jppf.server.job.management.DriverJobManagement.getAllJobIds(DriverJobManagement.java:172)
  at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  at java.lang.reflect.Method.invoke(Method.java:597)
  at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93)
  at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27)
  at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208)
  at com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:65)
  at com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:216)
  at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666)
Steps to reproduce this issue
I cannot reproduce, but this was reported against v3.0.1 in this forum topic. I can easily see how this would happen in the code, though.

#8
Comment posted by
lolo4j
Nov 03, 08:36
Fixed in branch b3.0: revision 2530
#12
Comment posted by
lolo4j
Nov 03, 08:58


The issue was updated with the following change(s):
  • This issue has been closed
  • The status has been updated, from Confirmed to Closed.
  • This issue's progression has been updated to 100 percent completed.
  • The resolution has been updated, from Not determined to RESOLVED.
  • Information about the user working on this issue has been changed, from lolo4j to Not being worked on.
#23
Comment posted by
lolo4j
Dec 13, 11:23
fixed in branch b5.0 revision 3920