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On Saturday, September 19, 2015 10:42 AM, Zhudacai
<[email protected]> wrote:
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div.yiv7661362184WordSection1 {}-->Hi,ALL We get a problem about enable
UseNUMA flag for my hadoop framework. We've tried to specify JVM flags
during hadoop daemon's starts, e.g. export HADOOP_NAMENODE_OPTS="-XX:+UseNUMA
-Dcom.sun.management.jmxremote $HADOOP_NAMENODE_OPTS", export
HADOOP_SECONDARYNAMENODE_OPTS="-XX:+UseNUMA -Dcom.sun.management.jmxremote
$HADOOP_SECONDARYNAMENODE_OPTS", etc. But the ratio between local and remote
memory access is 2:1, just remains as same as before. Then we find that
hadoop MapReduce start child JVM processes to run task in containers. So we
passes -XX:+UseNUMA to JVMs by set theting configuration parameter
child.java.opts. But hadoop starts to throw ExitCodeExceptionException
(exitCode=1), seems that hadoop does not support this JVM parameter. What
should we do to enable UseNUMA flag for my hadoop? Or what should we do to
decrease the local/remote memory access in NUMA framework? Should we just
change Hadoop script or resorts to source code? And how to do it? The hadoop
version is 2.6.0. Best Regards. Dacai
