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https://issues.apache.org/jira/browse/HBASE-4880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13164773#comment-13164773
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Hadoop QA commented on HBASE-4880:
----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12506518/4880.txt
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
-1 javadoc. The javadoc tool appears to have generated -160 warning
messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
-1 findbugs. The patch appears to introduce 72 new Findbugs (version
1.3.9) warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/466//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/466//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/466//console
This message is automatically generated.
> Region is on service before openRegionHandler completes, may cause data loss
> ----------------------------------------------------------------------------
>
> Key: HBASE-4880
> URL: https://issues.apache.org/jira/browse/HBASE-4880
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0, 0.94.0
> Reporter: chunhui shen
> Assignee: chunhui shen
> Attachments: 4880.txt, hbase-4880.patch, hbase-4880v2.patch,
> hbase-4880v3.patch
>
>
> OpenRegionHandler in regionserver is processed as the following steps:
> {code}
> 1.openregion()(Through it, closed = false, closing = false)
> 2.addToOnlineRegions(region)
> 3.update .meta. table
> 4.update ZK's node state to RS_ZK_REGION_OPEND
> {code}
> We can find that region is on service before Step 4.
> It means client could put data to this region after step 3.
> What will happen if step 4 is failed processing?
> It will execute OpenRegionHandler#cleanupFailedOpen which will do closing
> region, and master assign this region to another regionserver.
> If closing region is failed, the data which is put between step 3 and step 4
> may loss, because the region has been opend on another regionserver and be
> put new data. Therefore, it may not be recoverd through replayRecoveredEdit()
> because the edit's LogSeqId is smaller than current region SeqId.
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