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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2016/06/17 22:19:05 UTC
[jira] [Updated] (HBASE-16059) Region normalizer fails to trigger
merge action where one of the regions is empty
[ https://issues.apache.org/jira/browse/HBASE-16059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ted Yu updated HBASE-16059:
---------------------------
Summary: Region normalizer fails to trigger merge action where one of the regions is empty (was: Region normalizer failed to trigger merge action where expected)
> Region normalizer fails to trigger merge action where one of the regions is empty
> ---------------------------------------------------------------------------------
>
> Key: HBASE-16059
> URL: https://issues.apache.org/jira/browse/HBASE-16059
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: Romil Choksi
> Assignee: Ted Yu
> Labels: normalization
> Fix For: 2.0.0
>
> Attachments: 16059.v1.txt
>
>
> Region normalizer failed to trigger merge action where expected
> Steps to reproduce:
> - Pre-split the test table into 5 regions with keys 1,3,7,8
> - Insert some data for each of the split. 27K rows for regions starting with key 1, and 100K rows for each of the regions with start key 3,7 and 8
> - Scan the test table, and verify that these regions exists - 1) STARTKEY => ‘' ENDKEY => ’1’ 2) STARTKEY => ’1’ ENDKEY => ’3’
> - Turn on normalization, verify normalization switch is enabled and that normalization is true for test table
> - Run normalizer a few times
> - Scan test table again, verify that regions don’t exist anymore 1) STARTKEY => ‘' ENDKEY => ’1’ 2) STARTKEY => ’1’ ENDKEY => ’3’, but instead a new region is created with STARTKEY => ’’ ENDKEY => ’3’
> The test now fails, with the last step failing at assertion.
> Looking into the Master log, I see that normalization plan was computed for the test table but it decides that no normalization is needed for the test table, and that the regions look good.
> {code:title = Master.log}
> 2016-06-17 00:41:46,895 DEBUG [B.defaultRpcServer.handler=4,queue=1,port=20000] normalizer.SimpleRegionNormalizer: Computing normalization plan for table: table_zrof6ea383, number of regions: 5
> 2016-06-17 00:41:46,895 DEBUG [B.defaultRpcServer.handler=4,queue=1,port=20000] normalizer.SimpleRegionNormalizer: Table table_zrof6ea383, total aggregated regions size: 13
> 2016-06-17 00:41:46,896 DEBUG [B.defaultRpcServer.handler=4,queue=1,port=20000] normalizer.SimpleRegionNormalizer: Table table_zrof6ea383, average region size: 2.6
> 2016-06-17 00:41:46,896 DEBUG [B.defaultRpcServer.handler=4,queue=1,port=20000] normalizer.SimpleRegionNormalizer: No normalization needed, regions look good for table: table_zrof6ea383
> {code}
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