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
