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From "Shengsheng Huang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6372) Add scanner batching to Export job
Date Fri, 27 Jul 2012 06:23:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13423698#comment-13423698
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Shengsheng Huang commented on HBASE-6372:
-----------------------------------------

{quote}
-1 core tests. The patch failed these unit tests:
org.apache.hadoop.hbase.coprocessor.TestRegionServerCoprocessorExceptionWithAbort 
{quote}
I don't think this patch has something to do with this unit test.  This unit test had passed
at my local deployment. 
                
> Add scanner batching to Export job
> ----------------------------------
>
>                 Key: HBASE-6372
>                 URL: https://issues.apache.org/jira/browse/HBASE-6372
>             Project: HBase
>          Issue Type: Improvement
>          Components: mapreduce
>    Affects Versions: 0.96.0, 0.94.2
>            Reporter: Lars George
>            Priority: Minor
>              Labels: newbie
>         Attachments: HBASE-6372.patch
>
>
> When a single row is too large for the RS heap then an OOME can take out the entire RS.
Setting scanner batching in custom scans helps avoiding this scenario, but for the supplied
Export job this is not set.
> Similar to HBASE-3421 we can set the batching to a low number - or if needed make it
a command line option.

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