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MapReduce >> mail # dev >> ApplicationMaster and completed container status


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ApplicationMaster and completed container status
Hi,

According to

http://hadoop.apache.org/common/docs/r0.23.0/hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html

>Completed containers: Once an ApplicationMaster triggers a launch an
allocated container, it will receive an update from the ResourceManager
when the container completes. The ApplicationMaster can look into the
status of the completed container and take appropriate actions such as
re-trying a particular sub-task in case of a failure.

My understanding is NM sends the completed status of the containers to the
RM and the RM in turn sends the status to AM. Why can't the NM send the
status of the completed containers to the AM directly? The NM will anyway
know which AM has requested for launching the containers.

Thanks,
Praveen
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB