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From "gabriele renzi (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-853) ConcurrentModificationException
Date Fri, 05 Mar 2010 17:32:27 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

gabriele renzi updated CASSANDRA-853:
-------------------------------------

    Attachment: CASSANDRA-853.patch

> ConcurrentModificationException
> -------------------------------
>
>                 Key: CASSANDRA-853
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-853
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.6
>            Reporter: B. Todd Burruss
>            Assignee: Jonathan Ellis
>             Fix For: 0.6
>
>         Attachments: CASSANDRA-853.patch
>
>
> 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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