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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9451) Meta remains unassigned when the meta server crashes with the ClusterStatusListener set
Date Fri, 06 Sep 2013 17:19:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13760373#comment-13760373

Hadoop QA commented on HBASE-9451:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 hadoop1.0{color}.  The patch compiles against the hadoop 1.0 profile.

    {color:green}+1 hadoop2.0{color}.  The patch compiles against the hadoop 2.0 profile.

    {color:red}-1 javadoc{color}.  The javadoc tool appears to have generated 1 warning messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 findbugs{color}.  The patch does not introduce any 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/7069//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/7069//console

This message is automatically generated.
> Meta remains unassigned when the meta server crashes with the ClusterStatusListener set
> ---------------------------------------------------------------------------------------
>                 Key: HBASE-9451
>                 URL: https://issues.apache.org/jira/browse/HBASE-9451
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Nicolas Liochon
>         Attachments: 9451.v1.patch
> While running tests described in HBASE-9338, ran into this problem. The hbase.status.listener.class
was set to org.apache.hadoop.hbase.client.ClusterStatusListener$MultiCastListener.
> 1. I had the meta server coming down
> 2. The metaSSH got triggered. The call chain:
>    2.1 verifyAndAssignMetaWithRetries
>    2.2 verifyMetaRegionLocation
>    2.3 waitForMetaServerConnection
>    2.4 getMetaServerConnection
>    2.5 getCachedConnection
>    2.6 HConnectionManager.getAdmin(serverName, false)
>    2.7 isDeadServer(serverName) -> This is hardcoded to return 'false' when the clusterStatusListener
field is null. If clusterStatusListener is not null (in my test), then it could return true
in certain cases (and in this case, indeed it should return true since the server is down).
I am trying to understand why it's hardcoded to 'false' for former case.
> 3. When isDeadServer returns true, the method HConnectionManager.getAdmin(ServerName,
boolean) throws RegionServerStoppedException.
> 4. Finally, after the retries are over verifyAndAssignMetaWithRetries gives up and the
master aborts.
> The methods in the above call chain don't handle RegionServerStoppedException. Maybe
something to look at... 

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