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https://issues.apache.org/jira/browse/HBASE-11397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14043020#comment-14043020
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Hadoop QA commented on HBASE-11397:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12652330/11397-v3.patch
against trunk revision .
ATTACHMENT ID: 12652330
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 3 new
or modified tests.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:red}-1 findbugs{color}. The patch appears to introduce 2 new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 lineLengths{color}. The patch does not introduce lines
longer than 100
{color:green}+1 site{color}. The mvn site goal succeeds with this patch.
{color:green}+1 core tests{color}. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/9842//console
This message is automatically generated.
> When merging expired stripes, we need to create an empty file to preserve
> metadata.
> -----------------------------------------------------------------------------------
>
> Key: HBASE-11397
> URL: https://issues.apache.org/jira/browse/HBASE-11397
> Project: HBase
> Issue Type: Bug
> Components: Compaction
> Affects Versions: 0.98.2
> Environment: jdk1.7.0_45, hadoop-cdh5, hbase-0.98.2
> Reporter: Victor Xu
> Assignee: Victor Xu
> Fix For: 0.99.0, 0.98.4
>
> Attachments: 11397-v3.patch, HBASE-11397-AssertionError.png,
> HBASE-11397-HDFS.png, HBASE-11397-RS-Log.png, HBASE-11397-Stripe-Info.png,
> HBASE-11397-test.patch, HBASE-11397-v2.patch, HBASE-11397.patch
>
>
> Stripe Compaction is a good feature in 0.96 and 0.98. But when I used it in a
> heavy-write non-uniform row keys scenario(e.g. time dimension in a key), I
> came across some problems.
> I made my stripes split at the size of 2G(hbase.store.stripe.sizeToSplit=2G),
> and soon there were tens of them. It was true that only the last stripe
> receiving the new keys kept compacting - old data didn't compact as much, or
> at all. However, the old stripes were still there when they all expired. I
> checked the source code and found that when compacting expired stripes, the
> StoreScanner may return no KVs so that SizeMultiWriter.append() is never
> called. That's to say, NO NEW FILE WILL BE CREATED.
> My solution is to create an empty file to preserve metadata at the end of the
> SizeMultiWriter.commitWritersInternal().
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