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https://issues.apache.org/jira/browse/HBASE-5986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276385#comment-13276385
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[email protected] commented on HBASE-5986:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/5133/
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Review request for hbase.
Summary
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We found this issue when running large scale ingestion tests for HBASE-5754.
The problem is that the .META. table updates are not atomic while splitting a
region. In SplitTransaction, there is a time lap between the marking the parent
offline, and adding of daughters to the META table. This can result in clients
using MetaScanner, of HTable.getStartEndKeys (used by the TableInputFormat)
missing regions which are made just offline, but the daughters are not added
yet.
This addresses bug HBASE-5986.
https://issues.apache.org/jira/browse/HBASE-5986
Diffs
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src/main/java/org/apache/hadoop/hbase/catalog/MetaEditor.java 8873512
src/main/java/org/apache/hadoop/hbase/client/HTable.java b8290e4
src/main/java/org/apache/hadoop/hbase/client/MetaScanner.java f404999
src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
a8091e6
Diff: https://reviews.apache.org/r/5133/diff
Testing
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added extensive tests under TestEndToEndSplitTranscation, and ran existing unit
tests.
Thanks,
enis
> Clients can see holes in the META table when regions are being split
> --------------------------------------------------------------------
>
> Key: HBASE-5986
> URL: https://issues.apache.org/jira/browse/HBASE-5986
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.1, 0.96.0, 0.94.1
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Attachments: HBASE-5986-test_v1.patch
>
>
> We found this issue when running large scale ingestion tests for HBASE-5754.
> The problem is that the .META. table updates are not atomic while splitting a
> region. In SplitTransaction, there is a time lap between the marking the
> parent offline, and adding of daughters to the META table. This can result in
> clients using MetaScanner, of HTable.getStartEndKeys (used by the
> TableInputFormat) missing regions which are made just offline, but the
> daughters are not added yet.
> This is also related to HBASE-4335.
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