Recently I have installed data nodes on Ubuntu 12.04 and observed failing
M/R jobs with errors like this:
Diagnostics report from attempt_1351154628597_0002_m_000000_0: Container
[pid=14529,containerID=container_1351154628597_0002_01_000002] is running
beyond virtual memory limits. Current usage: 124.4mb of 1.0gb physical
memory used; 2.1gb of 2.1gb virtual memory used. Killing container.
Dump of the process-tree for container_1351154628597_0002_01_000002 :
|- PID PPID PGRPID SESSID CMD_NAME USER_MODE_TIME(MILLIS)
SYSTEM_TIME(MILLIS) VMEM_USAGE(BYTES) RSSMEM_USAGE(PAGES) FULL_CMD_LINE
|- 14529 13550 14529 14529 (java) 678 18 2265411584 31856
/home/gd/gd/jdk1.6.0_35/bin/java -Djava.net.preferIPv4Stack=true
-Dhadoop.metrics.log.level=WARN -Xmx1000M -XX:MaxPermSize=512M
-Djava.io.tmpdir=/home/gd/gd/gi-de-nosql.cdh4-base/data/yarn/usercache/gd/appcache/application_1351154628597_0002/container_1351154628597_0002_01_000002/tmp
-Dlog4j.configuration=container-log4j.properties
-Dyarn.app.mapreduce.container.log.dir=/home/gd/gd/gi-de-nosql.cdh4-base/logs/application_1351154628597_0002/container_1351154628597_0002_01_000002
-Dyarn.app.mapreduce.container.log.filesize=0 -Dhadoop.root.logger=INFO,CLA
org.apache.hadoop.mapred.YarnChild 192.168.178.25 36183
attempt_1351154628597_0002_m_000000_0 2
I am using CDH4.0.1 (hadoop 2.0.0) with the Yarn M/R implementation on
Ubuntu 12.04 64Bit.
According to HADOOP-7154 making sure MALLOC_ARENA_MAX=1 (or 4) is exported
should fix the issue.
I tried the following:
Exporting the environment variable MALLOC_ARENA_MAX with value 1 in all
hadoop shell scrips (e.g. yarn-env.sh). Checking the launch_container.sh
script that Yarn creates I can tell that it indeed contains the line
export MALLOC_ARENA_MAX="1"
But still I am getting the error above.
In addition I tried adding
<property>
<name>mapred.child.env</name>
<value>MALLOC_ARENA_MAX=1</value>
</property>
to mapred-site.xml. But that didn't seem to fix it either.
Is there anything special that I need to configure on the server to make
the setting effective?
Any idea would be great!!
Thanks,
Henning
