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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14885) NullPointerException in HMaster#normalizeRegions() due to missing TableDescriptor
Date Thu, 26 Nov 2015 03:16:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15028082#comment-15028082

Hadoop QA commented on HBASE-14885:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against branch-1 branch at commit efb5917f2247b4cc1951ba950a9b9ff1a4606c92.
  ATTACHMENT ID: 12774432

    {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 hadoop versions{color}. The patch compiles with all supported hadoop versions
(2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.6.1 2.7.0 2.7.1)

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

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

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 checkstyle{color}. The applied patch does not generate new checkstyle

    {color:green}+1 findbugs{color}.  The patch does not introduce any  new Findbugs (version
2.0.3) 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 post-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/16671//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/16671//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/16671//artifact/patchprocess/checkstyle-aggregate.html

  Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/16671//console

This message is automatically generated.

> NullPointerException in HMaster#normalizeRegions() due to missing TableDescriptor
> ---------------------------------------------------------------------------------
>                 Key: HBASE-14885
>                 URL: https://issues.apache.org/jira/browse/HBASE-14885
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.3.0
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>         Attachments: 14885-branch-1.txt, 14885-v1.txt
> During system test on Windows, we observed the following in master log:
> {code}
> 2015-11-23 11:31:38,853 ERROR org.apache.hadoop.hbase.master.normalizer.RegionNormalizerChore:
Caught error^M
> java.lang.NullPointerException^M
>   at org.apache.hadoop.hbase.master.HMaster.normalizeRegions(HMaster.java:1396)^M
>   at org.apache.hadoop.hbase.master.normalizer.RegionNormalizerChore.chore(RegionNormalizerChore.java:49)^M
>   at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:185)^M
>   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)^M
>   at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)^M
>   at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)^M
>   at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)^M
>   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)^M
>   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)^M
>   at java.lang.Thread.run(Thread.java:745)^M
> {code}
> The NullPointerException came from the second line below:
> {code}
>       for(TableName table : allEnabledTables) {
>         if (table.isSystemTable() || !getTableDescriptors().get(table).isNormalizationEnabled())
> {code}
> It seems TableDescriptor for some table was absent.
> normalizeRegions() should deal with such scenario without producing NPE.

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