[jira] [Created] (YARN-7678) Logging of container memory stats is missing in 2.8

["Jim Brennan (JIRA)" <ji...@apache.org>]

Jim Brennan created YARN-7678:
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             Summary: Logging of container memory stats is missing in 2.8
                 Key: YARN-7678
                 URL: https://issues.apache.org/jira/browse/YARN-7678
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: nodemanager
    Affects Versions: 3.0.0, 2.8.0
            Reporter: Jim Brennan
            Assignee: Jim Brennan


YARN-3424 changed logging of memory stats from ContainersMonitorImpl to INFO to DEBUG.
We have found these log messages to be useful information in Out-of-Memory situations - they provide detail that helps show the memory profile of the container over time, which can be helpful in determining root cause.

Here's an example message from YARN-3424:
{noformat}
2015-03-27 09:32:48,905 INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl: Memory usage of ProcessTree 9215 for container-id container_1427462602546_0002_01_000008: 189.8 MB of 1 GB physical memory used; 2.6 GB of 2.1 GB virtual memory used
{noformat}

Propose to change this to use a separate logger for this message, so that we can enable debug logging for this without enabling all of the other debug logging for ContainersMonitorImpl.



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