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https://issues.apache.org/jira/browse/HDFS-9313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14976685#comment-14976685
]
Hadoop QA commented on HDFS-9313:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch | 21m 6s | Pre-patch trunk has 1 extant
Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | @author | 0m 0s | The patch does not contain any
@author tags. |
| {color:green}+1{color} | tests included | 0m 0s | The patch appears to
include 1 new or modified test files. |
| {color:green}+1{color} | javac | 9m 11s | There were no new javac warning
messages. |
| {color:green}+1{color} | javadoc | 12m 3s | There were no new javadoc
warning messages. |
| {color:green}+1{color} | release audit | 0m 27s | The applied patch does
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle | 1m 40s | There were no new checkstyle
issues. |
| {color:green}+1{color} | whitespace | 0m 0s | The patch has no lines that
end in whitespace. |
| {color:green}+1{color} | install | 1m 48s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 40s | The patch built with
eclipse:eclipse. |
| {color:green}+1{color} | findbugs | 2m 55s | The patch does not introduce
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native | 3m 42s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 55m 9s | Tests failed in hadoop-hdfs. |
| | | 108m 46s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.shortcircuit.TestShortCircuitCache |
| | hadoop.hdfs.server.namenode.ha.TestBootstrapStandbyWithQJM |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12768993/HDFS-9313-2.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / bcb2386 |
| Pre-patch Findbugs warnings |
https://builds.apache.org/job/PreCommit-HDFS-Build/13225/artifact/patchprocess/trunkFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/13225/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/13225/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf900.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/13225/console |
This message was automatically generated.
> Possible NullPointerException in BlockManager if no excess replica can be
> chosen
> --------------------------------------------------------------------------------
>
> Key: HDFS-9313
> URL: https://issues.apache.org/jira/browse/HDFS-9313
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Ming Ma
> Assignee: Ming Ma
> Attachments: HDFS-9313-2.patch, HDFS-9313.patch
>
>
> HDFS-8647 makes it easier to reason about various block placement scenarios.
> Here is one possible case where BlockManager won't be able to find the excess
> replica to delete: when storage policy changes around the same time balancer
> moves the block. When this happens, it will cause NullPointerException.
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy.adjustSetsWithChosenReplica(BlockPlacementPolicy.java:156)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseReplicasToDelete(BlockPlacementPolicyDefault.java:978)
> {noformat}
> Note that it isn't found in any production clusters. Instead, it is found
> from new unit tests. In addition, the issue has been there before HDFS-8647.
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