Bartłomiej Romański created CASSANDRA-4673:
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             Summary: Compaction of HintsColumnFamily stucks
                 Key: CASSANDRA-4673
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4673
             Project: Cassandra
          Issue Type: Bug
    Affects Versions: 1.1.1
         Environment: We've got a 24 nodes cluster with 3 virtual data centers. 
We've got 7 nodes with SSD drives. We are operating under very heavy read/write 
load. We typically seeing CPU usage >90% on our machines.

We are using 1.1.2 - why this version is not listed in the 'Affected Version' 
drop down?
            Reporter: Bartłomiej Romański


On some nodes the compaction of HintsColumnFamily stucked. Here is a typical 
output of 'nodetool compactionstats':

pending tasks: 1
          compaction type        keyspace   column family bytes compacted     
bytes total  progress
               Compaction          systemHintsColumnFamily       346205828      
 346909662    99.80%
Active compaction remaining time :   0h00m00s

Rebooting a node does not help. The compaction starts immediately after booting 
and stucks and the same point.

If this can be related we are also expiring a problem described in 
CASSANDRA-4639.



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