Hi, after letting flume idle for the weekend listening in on a small stream of live data, we noticed several of our flume collector nodes failing with InterruptedException's being thrown.  Logs have errors that look something like below.  Any idea of what's going on here and how to fix it?

2011-10-17 08:02:02,107 INFO com.cloudera.flume.handlers.debug.StubbornAppendSink: append Interrupted event 'flume-node.lindenlab.com' [INFO Mon Oct 17 08:01:59 UTC 2011] { syslogfacility : 16 } { syslogseverity : 6 } Oct 17 01:01:59 SOME MESSAGE' with error: Blocked append interrupted by rotation event
2011-10-17 08:02:02,107 INFO com.cloudera.flume.handlers.rolling.RollSink: closing RollSink 'escapedCustomDfs("hdfs://master-node:54310/logs/raw/%Y/%m/%d/%H00","test%{rolltag}" )'
2011-10-17 08:02:02,109 ERROR com.cloudera.flume.core.connector.DirectDriver: Closing down due to exception during append calls
java.lang.InterruptedException
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireNanos(AbstractQueuedSynchronizer.java:1223)
        at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.tryLock(ReentrantReadWriteLock.java:976)
        at com.cloudera.flume.handlers.rolling.RollSink.close(RollSink.java:296)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.handlers.debug.InsistentOpenDecorator.close(InsistentOpenDecorator.java:175)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.handlers.debug.StubbornAppendSink.append(StubbornAppendSink.java:78)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.debug.InsistentAppendDecorator.append(InsistentAppendDecorator.java:110)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.endtoend.AckChecksumChecker.append(AckChecksumChecker.java:113)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.batch.UnbatchingDecorator.append(UnbatchingDecorator.java:62)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60) 
        at com.cloudera.flume.handlers.batch.GunzipDecorator.append(GunzipDecorator.java:81)
        at com.cloudera.flume.collector.CollectorSink.append(CollectorSink.java:222)
        at com.cloudera.flume.core.connector.DirectDriver$PumperThread.run(DirectDriver.java:110)
2011-10-17 08:02:02,109 INFO com.cloudera.flume.core.connector.DirectDriver: Connector logicalNode node6-22 exited with error: nulljava.lang.InterruptedException
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireNanos(AbstractQueuedSynchronizer.java:1223)        
        at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.tryLock(ReentrantReadWriteLock.java:976)
        at com.cloudera.flume.handlers.rolling.RollSink.close(RollSink.java:296)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.handlers.debug.InsistentOpenDecorator.close(InsistentOpenDecorator.java:175)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.handlers.debug.StubbornAppendSink.append(StubbornAppendSink.java:78)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.debug.InsistentAppendDecorator.append(InsistentAppendDecorator.java:110)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.endtoend.AckChecksumChecker.append(AckChecksumChecker.java:113)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.batch.UnbatchingDecorator.append(UnbatchingDecorator.java:62)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.batch.GunzipDecorator.append(GunzipDecorator.java:81)
        at com.cloudera.flume.collector.CollectorSink.append(CollectorSink.java:222)
        at com.cloudera.flume.core.connector.DirectDriver$PumperThread.run(DirectDriver.java:110)
2011-10-17 08:02:02,109 INFO com.cloudera.flume.core.connector.DirectDriver: Connector logicalNode node6-22 exited with error: null
java.lang.InterruptedException
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireNanos(AbstractQueuedSynchronizer.java:1223)
        at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.tryLock(ReentrantReadWriteLock.java:976)
        at com.cloudera.flume.handlers.rolling.RollSink.close(RollSink.java:296)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.handlers.debug.InsistentOpenDecorator.close(InsistentOpenDecorator.java:175)
        at com.cloudera.flume.core.EventSinkDecorator.close(EventSinkDecorator.java:67)
        at com.cloudera.flume.handlers.debug.StubbornAppendSink.append(StubbornAppendSink.java:78)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.debug.InsistentAppendDecorator.append(InsistentAppendDecorator.java:110)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.endtoend.AckChecksumChecker.append(AckChecksumChecker.java:113)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.batch.UnbatchingDecorator.append(UnbatchingDecorator.java:62)
        at com.cloudera.flume.core.EventSinkDecorator.append(EventSinkDecorator.java:60)
        at com.cloudera.flume.handlers.batch.GunzipDecorator.append(GunzipDecorator.java:81)
        at com.cloudera.flume.collector.CollectorSink.append(CollectorSink.java:222)
        at com.cloudera.flume.core.connector.DirectDriver$PumperThread.run(DirectDriver.java:110)

Many thanks,

-Steve