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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12748) RegionCoprocessorHost.execOperation creates too many iterator objects
Date Thu, 24 Sep 2015 16:47:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14906626#comment-14906626
] 

Andrew Purtell commented on HBASE-12748:
----------------------------------------

Local build passes all tests all modules. 
{noformat}
[INFO] Reactor Summary:
[INFO] 
[INFO] Apache HBase ....................................... SUCCESS [  5.096 s]
[INFO] Apache HBase - Checkstyle .......................... SUCCESS [  0.909 s]
[INFO] Apache HBase - Resource Bundle ..................... SUCCESS [  0.308 s]
[INFO] Apache HBase - Annotations ......................... SUCCESS [  1.178 s]
[INFO] Apache HBase - Protocol ............................ SUCCESS [ 16.205 s]
[INFO] Apache HBase - Common .............................. SUCCESS [01:52 min]
[INFO] Apache HBase - Procedure ........................... SUCCESS [02:01 min]
[INFO] Apache HBase - Client .............................. SUCCESS [01:24 min]
[INFO] Apache HBase - Hadoop Compatibility ................ SUCCESS [  7.306 s]
[INFO] Apache HBase - Hadoop Two Compatibility ............ SUCCESS [  7.463 s]
[INFO] Apache HBase - Prefix Tree ......................... SUCCESS [ 11.143 s]
[INFO] Apache HBase - Server .............................. SUCCESS [  03:20 h]
[INFO] Apache HBase - Testing Util ........................ SUCCESS [  1.944 s]
[INFO] Apache HBase - Thrift .............................. SUCCESS [03:27 min]
[INFO] Apache HBase - Shell ............................... SUCCESS [  2.954 s]
[INFO] Apache HBase - Integration Tests ................... SUCCESS [  1.495 s]
[INFO] Apache HBase - Examples ............................ SUCCESS [  4.268 s]
[INFO] Apache HBase - Rest ................................ SUCCESS [15:20 min]
[INFO] Apache HBase - External Block Cache ................ SUCCESS [  1.124 s]
[INFO] Apache HBase - Assembly ............................ SUCCESS [ 12.564 s]
[INFO] Apache HBase - Shaded .............................. SUCCESS [  0.115 s]
[INFO] Apache HBase - Shaded - Client ..................... SUCCESS [  0.374 s]
[INFO] Apache HBase - Shaded - Server ..................... SUCCESS [  0.623 s]
[INFO] Apache HBase - Spark ............................... SUCCESS [02:56 min]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 03:48 h
[INFO] Finished at: 2015-09-23T19:53:09-07:00
[INFO] Final Memory: 125M/936M
[INFO] ------------------------------------------------------------------------
{noformat}


> RegionCoprocessorHost.execOperation creates too many iterator objects
> ---------------------------------------------------------------------
>
>                 Key: HBASE-12748
>                 URL: https://issues.apache.org/jira/browse/HBASE-12748
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 0.94.25, 0.98.9
>            Reporter: Vladimir Rodionov
>            Assignee: Andrew Purtell
>             Fix For: 2.0.0, 1.3.0, 0.98.15
>
>         Attachments: HBASE-12748.patch, HBASE-12748.patch, HBase-12748.patch
>
>
> This is typical pattern of enhanced for ... loop usage in a hot code path. For every
HBase operation it instantiates iterator for coprocessor list twice. 



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