nageswara Rao [https://community.jboss.org/people/itsnagesh] created the discussion
"Concurrent Modification exception in task server when running with 100 concurrent users" To view the discussion, visit: https://community.jboss.org/message/790471#790471 -------------------------------------------------------------- I have a business process with 5 manual activities with a fork, initially all user tasks are assigned to business admin My scenario is like start process instance for this Process, then business admin deligate each task to a seperate user and that user will complete the task then next task will be created When i execute this scenario with 100 concurrent users in load runner then 2% of the markdone operations are failing with Concurrent modifcation exception [java] java.util.ConcurrentModificationException [java] at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) [java] at java.util.AbstractList$Itr.next(AbstractList.java:343) [java] at org.jbpm.task.event.MessagingTaskEventListener.taskCompleted(MessagingTaskEventListener.java:72) [java] at org.jbpm.task.event.TaskEventSupport.fireTaskCompleted(TaskEventSupport.java:47) [java] at org.jbpm.task.service.TaskServiceSession.postTaskCompleteOperation(TaskServiceSession.java:497) [java] at org.jbpm.task.service.TaskServiceSession.taskOperation(TaskServiceSession.java:463) [java] at org.jbpm.task.service.TaskServerHandler.messageReceived(TaskServerHandler.java:84) [java] at org.jbpm.task.service.mina.MinaTaskServerHandler.messageReceived(MinaTaskServerHandler.java:41) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:716) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796) [java] at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:427) [java] at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:245) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796) [java] at org.apache.mina.filter.logging.LoggingFilter.messageReceived(LoggingFilter.java:177) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796) [java] at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:119) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434) [java] at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426) [java] at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:692) [java] at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:645) [java] at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:634) [java] at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:66) [java] at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1078) [java] at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64) [java] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [java] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [java] at java.lang.Thread.run(Thread.java:662) -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/790471#790471] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034]
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