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Posted to user@hadoop.apache.org by Akshay Aggarwal <ak...@gmail.com> on 2016/08/17 07:11:27 UTC
Dump not copied to HDFS | Taking memory dumps of Hadoop tasks
Hey,
I was following the following blog post to copy the dump in case the
container goes OOM -
https://yhemanth.wordpress.com/2013/03/28/taking-memory-
dumps-of-hadoop-tasks/
But for some reason the dump is not getting pushed to hdfs, I get the
following logs -
--
Log Type: stderr
Log Upload Time: Wed Aug 17 12:01:55 +0530 2016
Log Length: 833
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in
[jar:file:/grid/6/yarn/local/usercache/fk-fdp-cdm/filecache/2682/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in
[jar:file:/grid/7/yarn/local/filecache/10/mapreduce.tar.gz/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type
[org.slf4j.impl.Log4jLoggerFactory]*./copy_dump.sh: 2: ./copy_dump.sh:
Bad substitution*
Log Type: stdout
Log Upload Time: Wed Aug 17 12:01:55 +0530 2016
Log Length: 272
*java.lang.OutOfMemoryError: Java heap space
Dumping heap to ./heapdump.hprof ...
Heap dump file created [1906572521 <%5B1906572521> bytes in 7.933 secs]
#
# java.lang.OutOfMemoryError: Java heap space
# -XX:OnOutOfMemoryError="./copy_dump.sh"
# Executing /bin/sh -c "./copy_dump.sh"...*
--
copy_dump.sh looks like this -
#!/bin/sh
hadoop fs -copyFromLocal heapdump.hprof
/tmp/heapdump_akshay_aggarwal/${PWD//\//_}.hprof
And I've added the following params to my job -
-files hdfs:///user/fk-fdp-cdm/scripts/copy_dump.sh#copy_dump.sh \
-archives ${metadata_archive} \
-D mapred.create.symlink=yes \
-D mapreduce.reduce.java.opts='-Xmx2048m
-XX:+HeapDumpOnOutOfMemoryError
-XX:HeapDumpPath=./heapdump.hprof -XX:OnOutOfMemoryError=./copy_dump.sh' \
Any pointers to what might be wrong here?
Thanks,
Akshay Aggarwal