Document yarn.nodemanager.delete.debug-delay-sec configuration property
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Key: MAPREDUCE-3883
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3883
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: documentation
Reporter: Eugene Koontz
Priority: Minor
Fix For: 0.23.2
If you are using Yarn's nodemanager, you can add to your configuration:
{{
<property>
<name>yarn.nodemanager.delete.debug-delay-sec</name>
<value>10000000</value>
</property>
}}
(set the {{<value>}} large enough so that you can examine the contents before
the {{DeletionService}} deletes them).
to save the environmental directories of the applications (by default in
{{/tmp/nm-local-dir}} that the nodemanager starts so that you can examine them
later.
This setting is defined in
{{hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java}},
and used in
{{hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/DeletionService.java}}.
It's a useful configuration setting for developers, but seems not to be
documented currently (see
http://hadoop.apache.org/common/docs/r0.23.0/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/yarn-default.xml).
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