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Posted to yarn-issues@hadoop.apache.org by "Chuan Liu (JIRA)" <ji...@apache.org> on 2013/07/03 20:36:26 UTC
[jira] [Commented] (YARN-729) MR uses LD_LIBRARY_PATH which doesn't
mean anything in Windows
[ https://issues.apache.org/jira/browse/YARN-729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13699295#comment-13699295 ]
Chuan Liu commented on YARN-729:
--------------------------------
I can take a look the issue since this seems related to MAPREDUCE-4374 -- both are setting environment variable for child tasks. We should probably move the JIRA to MAPREDUCE as I believe the configuration and implementation is under mapreduce project.
> MR uses LD_LIBRARY_PATH which doesn't mean anything in Windows
> --------------------------------------------------------------
>
> Key: YARN-729
> URL: https://issues.apache.org/jira/browse/YARN-729
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 3.0.0
> Environment: Windows
> Reporter: Mostafa Elhemali
>
> In order to set the path for loading native libraries, MR relies on the default value of the mapreduce.admin.user.env configuration setting the LD_LIBRARY_PATH environment entry. There are two problems with this setting in Windows:
> a) LD_LIBRARY_PATH doesn't mean anything in Windows.
> b) It sets it using $HADOOP_COMMON_HOME, instead of %HADOOP_COMMON_HOME%.
> The default value here should be platform-dependent (use the PATH variable in Windows instead of LD_LIBRARY_PATH), or we should rely on another mechanism. The net effect is that in Windows unless this configuration is over-ridden MR jobs fail with this error:
> {code}
> 2013-05-29 13:51:41,049 FATAL [main] org.apache.hadoop.mapred.YarnChild: Error running child : java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
> at org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Native Method)
> at org.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:393)
> at org.apache.hadoop.fs.FileUtil.canRead(FileUtil.java:928)
> at org.apache.hadoop.util.DiskChecker.checkAccessByFileMethods(DiskChecker.java:177)
> at org.apache.hadoop.util.DiskChecker.checkDirAccess(DiskChecker.java:164)
> at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:98)
> at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:288)
> at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathToRead(LocalDirAllocator.java:431)
> at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathToRead(LocalDirAllocator.java:164)
> at org.apache.hadoop.mapred.YarnChild.configureLocalDirs(YarnChild.java:235)
> at org.apache.hadoop.mapred.YarnChild.configureTask(YarnChild.java:294)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:143)
> {code}
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