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Sangjin Lee commented on MAPREDUCE-6577: ---------------------------------------- My proposal would be to handle this in the same way as the non-AM tasks; i.e. provide the same default value for yarn.app.mapreduce.am.admin.user.env. That would also complete the intent of MAPREDUCE-6021. > 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} -- This message was sent by Atlassian JIRA (v6.3.4#6332)