Mohammad Kamrul Islam created MAPREDUCE-5723:
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Summary: MR AM container log empty if exception occurs
Key: MAPREDUCE-5723
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5723
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: applicationmaster
Affects Versions: 2.2.0
Reporter: Mohammad Kamrul Islam
Assignee: Mohammad Kamrul Islam
It occurs when the property "mapreduce.task.userlog.limit.kb" is set non-zero
in mapped-site.xml.
AM container syslog remains empty if any exception occurs.
Bug details:
In MRAppMaster.java, the following code snippets show the bug.
} catch (Throwable t) {
LOG.fatal("Error starting MRAppMaster", t);
System.exit(1);
}finally {
LogManager.shutdown();
}
In the catch block, we are exiting the JVM. So finally block (therefore
LogManager.shutdown()) is never executed.
Possible fix:
Make sure LogManager.shutdown() is executed in all cases.
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