[MAPREDUCE-6577] MR AM unable to load native library without MR_AM_ADMIN_USER_ENV set

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0, 2.7.3, 2.6.4, 3.0.0-alpha1
• Component/s: mr-am
• Target Version/s: 2.6.4
• Hadoop Flags: Reviewed
• Assignee: Sangjin Lee
• Reporter: Sangjin Lee
• Created: 17/Dec/15 06:46
• Updated: 06/Jan/17 07:58
• Resolved: 06/Jan/16 00:08

Description

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:

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

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:

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)

Issue Links

• duplicates: MAPREDUCE-5799 add default value of MR_AM_ADMIN_USER_ENV
• is broken by: MAPREDUCE-6021 MR AM should have working directory in LD_LIBRARY_PATH
• is depended upon by: MAPREDUCE-6588 default values for PATH for tasks are not quite correct on Windows
• is duplicated by: MAPREDUCE-6590 Update MRJobConfig.DEFAULT_MAPRED_ADMIN_USER_ENV value for loading correct navite lib when using ubertask feature
• is related to: HADOOP-13684 Snappy may complain Hadoop is built without snappy if libhadoop is not found.