[CASSANDRA-3400] ConcurrentModificationException during nodetool repair

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 0.8.8, 1.0.1

Environment

Suse Enterprise linux 11.4

• Severity: Low
• Assignee: Sylvain Lebresne
• Reporter: Scott Fines

Authors

Sylvain Lebresne

Reviewers

Jonathan Ellis

• Created: 24/Oct/11 16:41
• Updated: 16/Apr/19 09:32
• Resolved: 25/Oct/11 15:52

Description

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