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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3793) Several NPEs when deleting local files on NM recovery
Date Mon, 29 Jun 2015 23:26:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-3793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14606648#comment-14606648
] 

Hadoop QA commented on YARN-3793:
---------------------------------

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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  16m 12s | Pre-patch trunk compilation is healthy. |
| {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 |   7m 37s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |   9m 52s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does not increase
the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   0m 37s | 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 34s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 31s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   1m 14s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | yarn tests |   6m 17s | Tests passed in hadoop-yarn-server-nodemanager.
|
| | |  44m 21s | |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12742618/YARN-3793.02.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 8e33372 |
| hadoop-yarn-server-nodemanager test log | https://builds.apache.org/job/PreCommit-YARN-Build/8379/artifact/patchprocess/testrun_hadoop-yarn-server-nodemanager.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-YARN-Build/8379/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.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-YARN-Build/8379/console |


This message was automatically generated.

> Several NPEs when deleting local files on NM recovery
> -----------------------------------------------------
>
>                 Key: YARN-3793
>                 URL: https://issues.apache.org/jira/browse/YARN-3793
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.6.0
>            Reporter: Karthik Kambatla
>            Assignee: Varun Saxena
>         Attachments: YARN-3793.01.patch, YARN-3793.02.patch
>
>
> When NM work-preserving restart is enabled, we see several NPEs on recovery. These seem
to correspond to sub-directories that need to be deleted. I wonder if null pointers here mean
incorrect tracking of these resources and a potential leak. This JIRA is to investigate and
fix anything required.
> Logs show:
> {noformat}
> 2015-05-18 07:06:10,225 INFO org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor:
Deleting absolute path : null
> 2015-05-18 07:06:10,224 ERROR org.apache.hadoop.yarn.server.nodemanager.DeletionService:
Exception during execution of task in DeletionService
> java.lang.NullPointerException
>         at org.apache.hadoop.fs.FileContext.fixRelativePart(FileContext.java:274)
>         at org.apache.hadoop.fs.FileContext.delete(FileContext.java:755)
>         at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.deleteAsUser(DefaultContainerExecutor.java:458)
>         at org.apache.hadoop.yarn.server.nodemanager.DeletionService$FileDeletionTask.run(DeletionService.java:293)
> {noformat}



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