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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8790) NullPointerException thrown when stopping regionserver
Date Mon, 24 Jun 2013 10:43:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13691875#comment-13691875
] 

Hadoop QA commented on HBASE-8790:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12589381/HBase-8790.txt
  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
tests.
                        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:green}+1 javadoc{color}.  The javadoc tool did not generate any 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/6119//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/6119//console

This message is automatically generated.
                
> NullPointerException thrown when stopping regionserver
> ------------------------------------------------------
>
>                 Key: HBASE-8790
>                 URL: https://issues.apache.org/jira/browse/HBASE-8790
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.95.1
>         Environment: CentOS 5.9 x86_64, java version "1.6.0_45", CDH4.3
>            Reporter: Xiong LIU
>            Assignee: Liang Xie
>         Attachments: HBase-8790.txt
>
>
> The Hbase cluster is a fresh start with one regionserver.
> When we stop hbase, an unhandled NullPointerException is throwed in the regionserver.
> The regionserver's log is as follows:
> 2013-06-21 10:21:11,284 INFO  [regionserver61020] regionserver.HRegionServer: Closing
user regions
> 2013-06-21 10:21:14,288 DEBUG [regionserver61020] regionserver.HRegionServer: Waiting
on 1028785192
> 2013-06-21 10:21:14,290 FATAL [regionserver61020] regionserver.HRegionServer: ABORTING
region server HOSTNAME_TEST,61020,1371781086817
> : Unhandled: null
> java.lang.NullPointerException
>         at org.apache.hadoop.hbase.regionserver.HRegionServer.tryRegionServerReport(HRegionServer.java:988)
>         at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:832)
>         at java.lang.Thread.run(Thread.java:662)
> 2013-06-21 10:21:14,292 FATAL [regionserver61020] regionserver.HRegionServer: RegionServer
abort: loaded coprocessors are: [org.apache
> .hadoop.hbase.coprocessor.MultiRowMutationEndpoint]
> 2013-06-21 10:21:14,293 INFO  [regionserver61020] regionserver.HRegionServer: STOPPED:
Unhandled: null
> 2013-06-21 10:21:14,293 INFO  [regionserver61020] ipc.RpcServer: Stopping server on 61020
> It seems that after closing user regions, the rssStub is null.
> update:
> we found that if setting hbase.client.ipc.pool.type to RoundRobinPool(or other pool type)
and hbase.client.ipc.pool.size to 10(possibly other values) in hbase-site.xml, the regionserver
is continuously attempting connect to master. and if we stop hbase, the above NullPointerException
occurred. With hbase.client.ipc.pool.size set to 1, the cluster can be completely stopped.

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