Bartłomiej Romański created CASSANDRA-4639:
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Summary: Incorrect counter values
Key: CASSANDRA-4639
URL: https://issues.apache.org/jira/browse/CASSANDRA-4639
Project: Cassandra
Issue Type: Bug
Components: Core
Affects Versions: 1.1.2
Environment: We've got a production 21 node cluster with 3 virtual
data centers. Keyspace that contains counter column families has a replication
3 on DC1 and 1 on DC3. DC1 is using SSD drives, DC3 spinning hard drives. We
are using Ubuntu Server as an OS. Machines have 24GB of RAM.
Reporter: Bartłomiej Romański
Priority: Critical
Since yesterday almost all counters are incorrect. Usually about 4-5 times
higher than expected. In logs we've got this message:
ERROR [MutationStage:15] 2012-09-10 13:47:13,280 CounterContext.java (line 381)
invalid counter shard detected; (6de8e940-dd23-11e1-0000-5233df6faaff, 7, 242)
and (6de8e940-dd23-11e1-0000-5233df6faaff, 7, 392) differ only in count; will
pick highest to self-heal; this indicates a bug or corruption generated a bad
counter shard
every couple of seconds.
This cluster was running without any serious problems for at least 2 months.
Any ideas?
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