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https://issues.apache.org/jira/browse/MAPREDUCE-6577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15061624#comment-15061624
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Sangjin Lee commented on MAPREDUCE-6577:
----------------------------------------
MAPREDUCE-5799 is very close to this JIRA, but since 2.6.0 the issue has gotten
worse and more generic (MR AM cannot load the main hadoop native library).
Closed that one in favor of this more current description of the problem.
> MR AM unable to load native library without MR_AM_ADMIN_USER_ENV set
> --------------------------------------------------------------------
>
> Key: MAPREDUCE-6577
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6577
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mr-am
> Affects Versions: 2.6.0
> Reporter: Sangjin Lee
> Assignee: Sangjin Lee
> Priority: Critical
>
> If yarn.app.mapreduce.am.admin.user.env (or yarn.app.mapreduce.am.env) is not
> configured to set LD_LIBRARY_PATH, MR AM will fail to load the native library:
> {noformat}
> 2015-12-15 21:29:22,473 WARN [main] org.apache.hadoop.util.NativeCodeLoader:
> Unable to load native-hadoop library for your platform... using builtin-java
> classes where applicable
> {noformat}
> As a result, any code that needs the hadoop native library in the MR AM will
> fail. For example, an uber-AM with lz4 compression for the mapper task will
> fail:
> {noformat}
> 2015-12-15 21:30:17,575 WARN [uber-SubtaskRunner]
> org.apache.hadoop.mapred.LocalContainerLauncher: Exception running local
> (uberized) 'child' : java.lang.RuntimeException: native lz4 library not
> available
> at
> org.apache.hadoop.io.compress.Lz4Codec.getCompressorType(Lz4Codec.java:125)
> at
> org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:148)
> at
> org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:163)
> at org.apache.hadoop.mapred.IFile$Writer.<init>(IFile.java:114)
> at org.apache.hadoop.mapred.IFile$Writer.<init>(IFile.java:97)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1602)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1482)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:457)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
> at
> org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.runSubtask(LocalContainerLauncher.java:391)
> at
> org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.runTask(LocalContainerLauncher.java:309)
> at
> org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.access$200(LocalContainerLauncher.java:195)
> at
> org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler$1.run(LocalContainerLauncher.java:238)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
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