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https://issues.apache.org/jira/browse/HBASE-2712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12877929#action_12877929
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HBase Review Board commented on HBASE-2712:
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Message from: "Jean-Daniel Cryans" <[email protected]>
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This is an automatically generated e-mail. To reply, visit:
http://review.hbase.org/r/170/
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(Updated 2010-06-11 12:14:26.490410)
Review request for hbase.
Changes
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Fixed the potential NPE, and this one is against trunk.
Summary
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Patch against branch that does some refactoring and that fixes the bug at the
same time. Adds a unit test that doesn't pass without the refactoring.
Urgent to review.
This addresses bug HBASE-2712.
http://issues.apache.org/jira/browse/HBASE-2712
Diffs (updated)
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/trunk/src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java
953830
/trunk/src/test/java/org/apache/hadoop/hbase/client/TestHCM.java PRE-CREATION
Diff: http://review.hbase.org/r/170/diff
Testing
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Thanks,
Jean-Daniel
> Cached region location that went stale won't recover if asking for first row
> ----------------------------------------------------------------------------
>
> Key: HBASE-2712
> URL: https://issues.apache.org/jira/browse/HBASE-2712
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.20.4
> Reporter: Jean-Daniel Cryans
> Assignee: Jean-Daniel Cryans
> Priority: Blocker
> Fix For: 0.20.5, 0.21.0
>
>
> Let's say that:
> - A client cached the location of some region, not the first one in the table
> - The RS that was holding it fails
> - The first thing the client does after the failure is trying to reach the
> first row of that region
> This will never recover, since HCM.deleteCachedLocation doesn't delete if the
> row we asked for is the first row in a region. This looks a lot like
> HBASE-1920, but there isn't enough information in that jira to say that it's
> the same thing.
> This is a blocker, and it kills 0.20.5 RC2 (sorry).
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