ConcurrentModificationException - Bulk processing agent
In our production environment we are observing the below mentioned exception when executing Bulk processing agent. Any pointers to what could be causing this would be really helpful. When this error occurs the bulk process agent is terminated with the below mentioned exception.
PRPC 6.2 SP1.
In our production environment we are observing the below mentioned exception when executing Bulk processing agent. Any pointers to what could be causing this would be really helpful. When this error occurs the bulk process agent is terminated with the below mentioned exception.
PRPC 6.2 SP1.
Exception at 20150626T154525.386 GMT: java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(Unknown Source) at java.util.ArrayList$Itr.next(Unknown Source) at java.util.Collections$UnmodifiableCollection$1.next(Unknown Source) at com.pega.pegarules.data.internal.access.DatabaseImpl.performOps(DatabaseImpl.java:2806) at com.pega.pegarules.data.internal.access.DatabaseImpl.attemptToProcessUpdates(DatabaseImpl.java:2311) at com.pega.pegarules.data.internal.access.DatabaseImpl.processUpdates(DatabaseImpl.java:2164) at com.pega.pegarules.data.internal.access.DatabaseImpl.commit(DatabaseImpl.java:1921) at com.pegarules.generated.processBulkAssignment_060201__piyuxKsRAGEawOFTxKzCg.processBulkAssignment06_02_01(processBulkAssignment_060201__piyuxKsRAGEawOFTxKzCg.java:406) at com.pegarules.generated.processBulkAssignment_060201__piyuxKsRAGEawOFTxKzCg.invoke(processBulkAssignment_060201__piyuxKsRAGEawOFTxKzCg.java:82) at com.pega.pegarules.generation.internal.library.LibraryRuntime.resolveAndinvokeFunctionViaReflection(LibraryRuntime.java:131) at com.pega.pegarules.generation.internal.library.LibraryRuntime.invokeLibraryRuntime(LibraryRuntime.java:108) at com.pega.pegarules.session.internal.mgmt.Executable.invokeLibraryRuntime(Executable.java:7750) at com.pega.pegarules.priv.generator.LibrarySupport.resolveAndInvokeFunctionViaReflection(LibrarySupport.java:181) at com.pegarules.generated.pega_procom_pegaprocomutilities.processBulkAssignment(pega_procom_pegaprocomutilities.java:898) at com.pegarules.generated.activity.ra_action_checkbulkprocessqueue_a652d90b38ec6e3485c2cf3412fad681.step3_circum0(ra_action_checkbulkprocessqueue_a652d90b38ec6e3485c2cf3412fad681.java:607) at com.pegarules.generated.activity.ra_action_checkbulkprocessqueue_a652d90b38ec6e3485c2cf3412fad681.perform(ra_action_checkbulkprocessqueue_a652d90b38ec6e3485c2cf3412fad681.java:119) at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2890) at com.pegarules.generated.activity.ra_action_agentbulkprocessing_bbf174390e80df26936e573b23c9f3b9.step2_circum0(ra_action_agentbulkprocessing_bbf174390e80df26936e573b23c9f3b9.java:312) at com.pegarules.generated.activity.ra_action_agentbulkprocessing_bbf174390e80df26936e573b23c9f3b9.perform(ra_action_agentbulkprocessing_bbf174390e80df26936e573b23c9f3b9.java:89) at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2890) at com.pega.pegarules.session.internal.async.agent.QueueProcessor.runActivity(QueueProcessor.java:696) at com.pega.pegarules.session.internal.async.agent.QueueProcessor.execute(QueueProcessor.java:577) at com.pega.pegarules.session.internal.async.BatchRequestorTask.run(BatchRequestorTask.java:782) at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1043) at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:744) at com.pega.pegarules.session.internal.async.BatchRequestorTask.run(BatchRequestorTask.java:548) at com.pega.jsr166backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:991) at com.pega.jsr166backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:532) at java.lang.Thread.run(Unknown Source)
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Pegasystems Inc.
US
I took a quick look and don't see any HFixes for agentbulkprocessing in 6.2sp1. I also don't see any SRs raised against that error. How many nodes are processing at once? Does this occur if you only have one running? It's coming from inside the database code (DatabaseImpl.java) and after a commit, so I wonder if more than one node is trying to update the same row or something similar. I would assume locking would prevent this from being an issue, but you may have found some gap in the code. It would be helpful to know more about what you are doing when this happens. Does it always happen or just occasionally? Does the agent come up cleanly or just trip over this issue again and fall back over?
Updated: 16 Jul 2015 11:26 EDT
Pegasystems Inc.
US
An SR has been opened. We have received an initial diagnostic hot fix. This needs to be installed in Production environment.