[jira] [Commented] (CASSANDRA-3150) ColumnFormatRecordReader loops forever (StorageService.getSplits(..) out of whack)

["Mck SembWever (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-3150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13113326#comment-13113326 ] 

Mck SembWever commented on CASSANDRA-3150:
------------------------------------------

This is persisting to be a problem. And continuously gets worse through the day.
I can see like half my cf being read from one split.
It doesn't matter if it's ByteOrderingPartition or RandomPartitioner.
I've attached two screenshots from hadoop webpages.

> ColumnFormatRecordReader loops forever (StorageService.getSplits(..) out of whack)
> ----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-3150
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3150
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 0.8.4
>            Reporter: Mck SembWever
>            Assignee: Mck SembWever
>            Priority: Critical
>         Attachments: CASSANDRA-3150.patch, attempt_201109071357_0044_m_003040_0.grep-get_range_slices.log
>
>
> From http://thread.gmane.org/gmane.comp.db.cassandra.user/20039
> {quote}
> bq. Cassandra-0.8.4 w/ ByteOrderedPartitioner
> bq. CFIF's inputSplitSize=196608
> bq. 3 map tasks (from 4013) is still running after read 25 million rows.
> bq. Can this be a bug in StorageService.getSplits(..) ?
> getSplits looks pretty foolproof to me but I guess we'd need to add
> more debug logging to rule out a bug there for sure.
> I guess the main alternative would be a bug in the recordreader paging.
> {quote}

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