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Posted to mapreduce-issues@hadoop.apache.org by "Karthik Kambatla (JIRA)" <ji...@apache.org> on 2014/01/23 07:02:34 UTC
[jira] [Updated] (MAPREDUCE-5723) MR AM container log can be
truncated or empty
[ https://issues.apache.org/jira/browse/MAPREDUCE-5723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karthik Kambatla updated MAPREDUCE-5723:
----------------------------------------
Summary: MR AM container log can be truncated or empty (was: MR AM container log truncated on normal execution or empty if exception occurs)
> MR AM container log can be truncated or empty
> ---------------------------------------------
>
> 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
> Priority: Blocker
> Attachments: MAPREDUCE-5723.1.patch, MAPREDUCE-5723.2.patch, MAPREDUCE-5723.3.patch, MAPREDUCE-5723.4.patch
>
>
> 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.
> {code}
> } catch (Throwable t) {
> LOG.fatal("Error starting MRAppMaster", t);
> System.exit(1);
> }finally {
> LogManager.shutdown();
> }
> {code}
> 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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