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From "Omid Aladini (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4639) Incorrect counter values
Date Tue, 11 Sep 2012 14:43:08 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13453065#comment-13453065
] 

Omid Aladini commented on CASSANDRA-4639:
-----------------------------------------

This looks the same as CASSANDRA-4417 which is currently in progress.
                
> 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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