Gopal V created YARN-566: ---------------------------- Summary: Add a misconfiguration diagnostic or highlight mismatched resource.mb vs -Xmx Key: YARN-566 URL: https://issues.apache.org/jira/browse/YARN-566 Project: Hadoop YARN Issue Type: Improvement Reporter: Gopal V Priority: Minor
It is possible to misconfigure a pure-java MR application by setting mapreduce resource size to 1536Mb, while leaving the -Xmx value at the default 512Mb. The AM UI can track over-all memory usage of an app either via Runtime.maxMemory() or via the process watcher in YARN to report the actual memory used by the application. MR does not fail even when the memory -Xmx is set lower than the YARN allocations, but it spills & GCs instead to keep it with in the memory sizes. This is sub-optimal and would make sense for YARN to highlight in the AM UI or JHS UI for tuning/debugging purposes. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira