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https://issues.apache.org/jira/browse/HBASE-8374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13635412#comment-13635412
]
Hadoop QA commented on HBASE-8374:
----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12579361/8374-trunk-v3.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 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/5346//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/5346//console
This message is automatically generated.
> NPE when launching the balance
> ------------------------------
>
> Key: HBASE-8374
> URL: https://issues.apache.org/jira/browse/HBASE-8374
> Project: HBase
> Issue Type: Bug
> Components: Balancer
> Affects Versions: 0.95.0
> Environment: AWS / real cluster with 3 nodes + master
> Reporter: Nicolas Liochon
> Assignee: Ted Yu
> Fix For: 0.98.0, 0.95.1
>
> Attachments: 8374-trunk.txt, 8374-trunk-v2.txt, 8374-trunk-v3.txt,
> 8374-trunk-v4.txt
>
>
> I don't reproduce this all the time, but I had it on a fairly clean env.
> It occurs every 5 minutes (i.e. the balancer period). Impact is severe: the
> balancer does not run. When it starts to occurs, it occurs all the time. I
> haven't tried to restart the master, but I think it should be enough.
> Now, looking at the code, the NPE is strange.
> {noformat}
> 2013-04-18 08:09:52,079 ERROR [box,60000,1366281581983-BalancerChore]
> org.apache.hadoop.hbase.master.balancer.BalancerChore: Caught exception
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.<init>(BaseLoadBalancer.java:145)
> at
> org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:194)
> at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1295)
> at
> org.apache.hadoop.hbase.master.balancer.BalancerChore.chore(BalancerChore.java:48)
> at org.apache.hadoop.hbase.Chore.run(Chore.java:81)
> at java.lang.Thread.run(Thread.java:662)
> 2013-04-18 08:09:52,103 DEBUG [box,60000,1366281581983-CatalogJanitor]
> org.apache.hadoop.hbase.client.ClientScanner: Creating scanner over .META.
> starting at key ''
> {noformat}
> {code}
> if (regionFinder != null) {
> //region location
> List<ServerName> loc = regionFinder.getTopBlockLocations(region);
> regionLocations[regionIndex] = new int[loc.size()];
> for (int i=0; i < loc.size(); i++) {
> regionLocations[regionIndex][i] =
> serversToIndex.get(loc.get(i)); // <========= NPE here
> }
> }
> {code}
> pinging [~enis], just in case.
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