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https://issues.apache.org/jira/browse/CASSANDRA-5504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13696196#comment-13696196
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Oleksandr Petrov edited comment on CASSANDRA-5504 at 6/29/13 8:55 PM:
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Can anyone confirm if 1.2.4 contains the fix, too?
It seems to work, it's just not clear wether fix made it there or it's just a
coincidence...
UPDATE: sorry, I've tested against 1.2.5, so nevermind :)
was (Author: ifesdjeen):
Can anyone confirm if 1.2.4 contains the fix, too?
It seems to work, it's just not clear wether fix made it there or it's just a
coincidence...
> Eternal iteration when using older hadoop version due to next() call and
> empty key value
> ----------------------------------------------------------------------------------------
>
> Key: CASSANDRA-5504
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5504
> Project: Cassandra
> Issue Type: Bug
> Components: Hadoop
> Affects Versions: 1.2.0
> Reporter: Oleksandr Petrov
> Assignee: Oleksandr Petrov
> Priority: Minor
> Fix For: 1.2.5
>
> Attachments: 5504-v3.txt, patch2.diff, patch.diff
>
>
> Currently, when using newer hadoop versions, due to the call to
> next(ByteBuffer key, SortedMap<ByteBuffer, IColumn> value)
> within ColumnFamilyRecordReader, because `key.clear();` is called, key is
> emptied. That causes the StaticRowIterator and WideRowIterator to glitch,
> namely, when Iterables.getLast(rows).key is called, key is already empty.
> This will cause Hadoop to request the same range again and again all the time.
> Please see the attached patch/diff, it simply adds lastRowKey (ByteBuffer)
> and saves it for the next iteration along with all the rows, this allows
> query for the next range to be fully correct.
> This patch is branched from 1.2.3 version.
> Tested against Cassandra 1.2.3, with Hadoop 1.0.3, 1.0.4 and 0.20.2
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