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From "Lanny Ripple (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2388) ColumnFamilyRecordReader fails for a given split because a host is down, even if records could reasonably be read from other replica.
Date Wed, 31 Oct 2012 16:33:13 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487922#comment-13487922
] 

Lanny Ripple commented on CASSANDRA-2388:
-----------------------------------------

Would very much like a fix to this.  We have a 40 node ring running 2x hadoop clusters on
20 nodes each.  One cluster is on systems that are more flaky than the other (bad batch of
memory).  When building a split on the first cluster if a ring node is down in the area of
the second cluster we get timeouts with no way to blacklist the offending node even though
we have replicas local to the first cluster.
                
> ColumnFamilyRecordReader fails for a given split because a host is down, even if records
could reasonably be read from other replica.
> -------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-2388
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2388
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 0.6
>            Reporter: Eldon Stegall
>            Assignee: Mck SembWever
>            Priority: Minor
>              Labels: hadoop, inputformat
>             Fix For: 1.1.7
>
>         Attachments: 0002_On_TException_try_next_split.patch, CASSANDRA-2388-addition1.patch,
CASSANDRA-2388-extended.patch, CASSANDRA-2388.patch, CASSANDRA-2388.patch, CASSANDRA-2388.patch,
CASSANDRA-2388.patch
>
>
> ColumnFamilyRecordReader only tries the first location for a given split. We should try
multiple locations for a given split.

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