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https://issues.apache.org/jira/browse/HBASE-14575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15010379#comment-15010379
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stack commented on HBASE-14575:
-------------------------------
Can we have more test runs please given weird hanging MR tests.
Is the description at 'Ted Yu added a comment - 04/Nov/15 09:00' accurate
still? If so, why is not included in the patch. This is a difficult area to
keep straight. Would help if in code rather than up in a JIRA comment someplace.
On:
...IntegrationTestBigLinkedList Loop 4 8 2000000
/tmp/hbase-biglinkedlist-verify 8 --monkey slowDeterministic
... since it not the default 25M, don't you have to provide the width arg...
(otherwise, we have just one flush of 1M followed by another flush of a linked
1M... not much opportunity for stuff to mess up).
I like the intentional fail running test only showing bulk load timing out.
That seems to say the test is good.
> Reduce scope of compactions holding region lock
> -----------------------------------------------
>
> Key: HBASE-14575
> URL: https://issues.apache.org/jira/browse/HBASE-14575
> Project: HBase
> Issue Type: Sub-task
> Components: Compaction, regionserver
> Reporter: Nick Dimiduk
> Assignee: Nick Dimiduk
> Attachments: 14575-test-case.patch, 14575-v1.patch, 14575-v2.patch,
> 14575-v3.patch, 14575-v4.patch, 14575-v5.patch, 14575-v6.txt, 14575-v6.txt,
> 14575.v00.patch
>
>
> Per [~devaraj]'s idea on parent issue, let's see if we can reduce the scope
> of critical section under which compactions hold the region read lock.
> Here is summary from parent issue:
> Another idea is we can reduce the scope of when the read lock is held during
> compaction. In theory the compactor only needs a region read lock while
> deciding what files to compact and at the time of committing the compaction.
> We're protected from the case of region close events because compactions are
> checking (every 10k bytes written) if the store has been closed in order to
> abort in such a case.
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