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From "ruslan.usifov (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Edited] (CASSANDRA-3758) parallel compaction hang (on large rows?)
Date Mon, 23 Apr 2012 15:21:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13259645#comment-13259645
] 

ruslan.usifov edited comment on CASSANDRA-3758 at 4/23/12 3:19 PM:
-------------------------------------------------------------------

Looks like on 0.8 we have the same problem. This happens when we run nodetool cleanup, after
adding capacity to cluster
                
      was (Author: tantra):
    Looks like on 0.8 we have the same problem
                  
> parallel compaction hang (on large rows?)
> -----------------------------------------
>
>                 Key: CASSANDRA-3758
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3758
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Jackson Chung
>            Priority: Minor
>              Labels: compaction, datastax_qa
>             Fix For: 1.0.10
>
>         Attachments: 0001-Fix-totalBytes-count-for-ParallelCompactionIterable.txt, cassandra.log.zip
>
>
> it is observed that:
> nodetool -h 127.0.0.1 -p 8080 compactionstats
> pending tasks: 1
> compaction type keyspace column family bytes compacted bytes total progress
> Compaction SyncCoreComputedContactNetworks 119739938 0 n/a
> and that is not moving (ie the bytes compacted never increase, the bytes total stay 0).
> this is probably going to be difficult to reproduce, as the problem is observed when
compacting 15 large sstables (total ~300G).
> attaching the thread dumps (along with logs), when such happen.

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