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https://issues.apache.org/jira/browse/HBASE-4729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150722#comment-13150722
]
Hadoop QA commented on HBASE-4729:
----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12503776/4729.txt
against trunk revision .
+1 @author. The patch does not contain any @author tags.
-1 tests included. The patch doesn't appear to include any new or modified
tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
-1 javadoc. The javadoc tool appears to have generated -163 warning
messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
-1 findbugs. The patch appears to introduce 51 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 failed these unit tests:
org.apache.hadoop.hbase.master.TestDistributedLogSplitting
org.apache.hadoop.hbase.replication.TestReplication
org.apache.hadoop.hbase.io.hfile.TestHFileBlock
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/256//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/256//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/256//console
This message is automatically generated.
> Race between online altering and splitting kills the master
> -----------------------------------------------------------
>
> Key: HBASE-4729
> URL: https://issues.apache.org/jira/browse/HBASE-4729
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Jean-Daniel Cryans
> Assignee: ramkrishna.s.vasudevan
> Fix For: 0.92.0, 0.94.0
>
> Attachments: 4729.txt
>
>
> I was running an online alter while regions were splitting, and suddenly the
> master died and left my table half-altered (haven't restarted the master yet).
> What killed the master:
> {quote}
> 2011-11-02 17:06:44,428 FATAL org.apache.hadoop.hbase.master.HMaster:
> Unexpected ZK exception creating node CLOSING
> org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode =
> NodeExists for /hbase/unassigned/f7e1783e65ea8d621a4bc96ad310f101
> at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:110)
> at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
> at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:637)
> at
> org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.createNonSequential(RecoverableZooKeeper.java:459)
> at
> org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.create(RecoverableZooKeeper.java:441)
> at
> org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndWatch(ZKUtil.java:769)
> at
> org.apache.hadoop.hbase.zookeeper.ZKAssign.createNodeClosing(ZKAssign.java:568)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.unassign(AssignmentManager.java:1722)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.unassign(AssignmentManager.java:1661)
> at org.apache.hadoop.hbase.master.BulkReOpen$1.run(BulkReOpen.java:69)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> {quote}
> A znode was created because the region server was splitting the region 4
> seconds before:
> {quote}
> 2011-11-02 17:06:40,704 INFO
> org.apache.hadoop.hbase.regionserver.SplitTransaction: Starting split of
> region TestTable,0012469153,1320253135043.f7e1783e65ea8d621a4bc96ad310f101.
> 2011-11-02 17:06:40,704 DEBUG
> org.apache.hadoop.hbase.regionserver.SplitTransaction:
> regionserver:62023-0x132f043bbde0710 Creating ephemeral node for
> f7e1783e65ea8d621a4bc96ad310f101 in SPLITTING state
> 2011-11-02 17:06:40,751 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
> regionserver:62023-0x132f043bbde0710 Attempting to transition node
> f7e1783e65ea8d621a4bc96ad310f101 from RS_ZK_REGION_SPLITTING to
> RS_ZK_REGION_SPLITTING
> ...
> 2011-11-02 17:06:44,061 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
> regionserver:62023-0x132f043bbde0710 Successfully transitioned node
> f7e1783e65ea8d621a4bc96ad310f101 from RS_ZK_REGION_SPLITTING to
> RS_ZK_REGION_SPLIT
> 2011-11-02 17:06:44,061 INFO
> org.apache.hadoop.hbase.regionserver.SplitTransaction: Still waiting on the
> master to process the split for f7e1783e65ea8d621a4bc96ad310f101
> {quote}
> Now that the master is dead the region server is spewing those last two lines
> like mad.
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