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From Zklanu Ryś (Commented) (JIRA) <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4118) ConcurrentModificationException in ColumnFamily.updateDigest(ColumnFamily.java:294) (cassandra 1.0.8)
Date Tue, 10 Apr 2012 08:18:13 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13250503#comment-13250503
] 

Zklanu Ryś commented on CASSANDRA-4118:
---------------------------------------

@T Jake Luciani: what do you mean "doesn't really work"? We've been testing this configuration
for like 2 months and all seems to be working fine. We use "org.apache.cassandra.dht.RandomPartitioner".
Is that a must to use the lucandra partitioner?
                
> ConcurrentModificationException in ColumnFamily.updateDigest(ColumnFamily.java:294) 
(cassandra 1.0.8)
> ------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4118
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4118
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.0.8
>         Environment: two nodes, replication factor=2
>            Reporter: Zklanu Ryś
>            Assignee: Vijay
>             Fix For: 1.0.10, 1.1.0
>
>
> Sometimes when reading data I receive them without any exception but I can see in Cassandra
logs, that there is an error:
> ERROR [ReadRepairStage:58] 2012-04-05 12:04:35,732 AbstractCassandraDaemon.java (line
139) Fatal exception in thread Thread[ReadRepairStage:58,5,main]
> java.util.ConcurrentModificationException
>     at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
>     at java.util.AbstractList$Itr.next(AbstractList.java:343)
>     at org.apache.cassandra.db.ColumnFamily.updateDigest(ColumnFamily.java:294)
>     at org.apache.cassandra.db.ColumnFamily.digest(ColumnFamily.java:288)
>     at org.apache.cassandra.service.RowDigestResolver.resolve(RowDigestResolver.java:102)
>     at org.apache.cassandra.service.RowDigestResolver.resolve(RowDigestResolver.java:30)
>     at org.apache.cassandra.service.ReadCallback$AsyncRepairRunner.runMayThrow(ReadCallback.java:227)
>     at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)

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