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From Bartłomiej Romański (JIRA) <>
Subject [jira] [Created] (CASSANDRA-4673) Compaction of HintsColumnFamily stucks
Date Tue, 18 Sep 2012 00:41:08 GMT
Bartłomiej Romański created CASSANDRA-4673:

             Summary: Compaction of HintsColumnFamily stucks
                 Key: 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

pending tasks: 1
          compaction type        keyspace   column family bytes compacted     bytes total
               Compaction          systemHintsColumnFamily       346205828       346909662
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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