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From "Lu Ming (JIRA)" <>
Subject [jira] Created: (CASSANDRA-1239) GossipTimerTask throws ConcurrentModificationException after node decommission
Date Wed, 30 Jun 2010 07:12:49 GMT
GossipTimerTask throws ConcurrentModificationException after node decommission 

                 Key: CASSANDRA-1239
             Project: Cassandra
          Issue Type: Bug
    Affects Versions: 0.6.2, 0.6.3
            Reporter: Lu Ming

Yesterday I made decommission for a cassandra node, and this morning all the GossipTimerTask
threads get the fatal exception and crash.
Gossiper.doStatusCheck() visits endPointStateMap_ and get  a ConcurrentModificationException
 when Gossiper.removeEndPoint() is calling

INFO [Timer-0] 2010-06-30 07:53:51,290 (line 401) FatClient /
has been silent for 3600000ms, removing from gossip
ERROR [Timer-0] 2010-06-30 07:53:51,291 (line 78) Fatal exception in
thread Thread[Timer-0,5,RMI Runtime]
java.lang.RuntimeException: java.util.ConcurrentModificationException
        at org.apache.cassandra.gms.Gossiper$
        at java.util.TimerThread.mainLoop(
Caused by: java.util.ConcurrentModificationException
        at java.util.Hashtable$
        at org.apache.cassandra.gms.Gossiper.doStatusCheck(
        at org.apache.cassandra.gms.Gossiper$
        ... 2 more

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