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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13269) Remove result array preallocation to avoid OOME with large scan caching values
Date Wed, 18 Mar 2015 03:48:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14366594#comment-14366594
] 

stack commented on HBASE-13269:
-------------------------------

Does what JIRA promises so +1 (but pity we can't presize -- to do later when we have more
'sophisticated' means as per [~jonathan.lawlor])

> Remove result array preallocation to avoid OOME with large scan caching values
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-13269
>                 URL: https://issues.apache.org/jira/browse/HBASE-13269
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>             Fix For: 1.0.1, 0.98.12
>
>         Attachments: HBASE-13269-0.98.patch, HBASE-13269-1.0.patch
>
>
> Scan#setCaching(Integer.MAX_VALUE) will likely terminate the regionserver with an OOME
due to preallocation of the result array according to this parameter.  We should limit the
preallocation to some sane value. Definitely affects 0.98 (fix needed to HRegionServer) and
1.0.x (fix needed to RsRPCServices), not sure about later versions. 



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