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Scott Fines commented on CASSANDRA-3400: ---------------------------------------- A few notes as I discover them: This error occurs every time the nodetool runs repair--repair effectively does not work on this node now. > ConcurrentModificationException during nodetool repair > ------------------------------------------------------ > > Key: CASSANDRA-3400 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3400 > Project: Cassandra > Issue Type: Bug > Components: Core > Affects Versions: 0.8.7 > Environment: Suse Enterprise linux 11.4 > Reporter: Scott Fines > Assignee: Sylvain Lebresne > Priority: Minor > > When running a nodetool repair, the following exception can be thrown: > ERROR [AntiEntropySessions:12] 2011-10-24 11:17:52,154 > AbstractCassandraDaemon.java (line 139) Fatal exception in thread > Thread[AntiEntropySessions:12,5,RMI Runtime] > java.lang.RuntimeException: java.util.ConcurrentModificationException > at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:34) > at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) > at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) > at java.util.concurrent.FutureTask.run(FutureTask.java:138) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:619) > Caused by: java.util.ConcurrentModificationException > at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793) > at java.util.HashMap$KeyIterator.next(HashMap.java:828) > at > org.apache.cassandra.service.AntiEntropyService$RepairSession$RepairJob.sendTreeRequests(AntiEntropyService.java:784) > at > org.apache.cassandra.service.AntiEntropyService$RepairSession.runMayThrow(AntiEntropyService.java:680) > at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30) > ... 6 more -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira