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From "B. Todd Burruss" <bburr...@real.com>
Subject Re: ConcurrentModificationException
Date Fri, 05 Mar 2010 17:05:35 GMT
yes, 0.6 beta2

i'll open ticket

On Thu, 2010-03-04 at 19:00 -0800, Jonathan Ellis wrote:

> This is the 0.6 beta yes?  Looks like a regression, please open a ticket.
> 
> On Thu, Mar 4, 2010 at 8:54 PM, Todd Burruss <bburruss@real.com> wrote:
> > i'm seeing a lot of these ... any idea?
> >
> > 2010-03-04 18:53:21,455 ERROR [MEMTABLE-POST-FLUSHER:1] [DebuggableThreadPoolExecutor.java:94]
Error in executor futuretask
> > java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.lang.RuntimeException:
java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException
> >        at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
> >        at java.util.concurrent.FutureTask.get(FutureTask.java:83)
> >        at org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor.afterExecute(DebuggableThreadPoolExecutor.java:86)
> >        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:888)
> >        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> >        at java.lang.Thread.run(Thread.java:619)
> > Caused by: java.lang.RuntimeException: java.lang.RuntimeException: java.util.concurrent.ExecutionException:
java.util.ConcurrentModificationException
> >        at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:34)
> >        at java.util.concurrent.Executors$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)
> >        ... 2 more
> > Caused by: java.lang.RuntimeException: java.util.concurrent.ExecutionException:
java.util.ConcurrentModificationException
> >        at org.apache.cassandra.db.commitlog.CommitLog.discardCompletedSegments(CommitLog.java:357)
> >        at org.apache.cassandra.db.ColumnFamilyStore$2.runMayThrow(ColumnFamilyStore.java:392)
> >        at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
> >        ... 6 more
> > Caused by: java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException
> >        at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
> >        at java.util.concurrent.FutureTask.get(FutureTask.java:83)
> >        at org.apache.cassandra.db.commitlog.CommitLog.discardCompletedSegments(CommitLog.java:349)
> >        ... 8 more
> > Caused by: java.util.ConcurrentModificationException
> >        at java.util.ArrayDeque$DeqIterator.next(ArrayDeque.java:605)
> >        at org.apache.cassandra.db.commitlog.CommitLog.discardCompletedSegmentsInternal(CommitLog.java:385)
> >        at org.apache.cassandra.db.commitlog.CommitLog.access$300(CommitLog.java:71)
> >        at org.apache.cassandra.db.commitlog.CommitLog$6.call(CommitLog.java:343)
> >        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> >        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> >        at org.apache.cassandra.db.commitlog.CommitLogExecutorService.process(CommitLogExecutorService.java:113)
> >        at org.apache.cassandra.db.commitlog.CommitLogExecutorService.access$200(CommitLogExecutorService.java:35)
> >        at org.apache.cassandra.db.commitlog.CommitLogExecutorService$1.runMayThrow(CommitLogExecutorService.java:67)
> >        at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
> >        ... 1 more
> >



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