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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5525) Provide a way to query job tracker about its daemon thread's status
Date Fri, 20 Mar 2009 09:06:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12683805#action_12683805
] 

Hemanth Yamijala commented on HADOOP-5525:
------------------------------------------

If a thread throws an uncaught exception and dies, will it be in the state TERMINATED ? The
main use case is to find out what threads are not running. It would be very nice if an uncaught
exception's stack trace is printed as a diagnostic. Since that information would be available
from the log or out file, that may not be a mandatory thing to resolve this issue, only a
nice to have feature.

> Provide a way to query job tracker about its daemon thread's status
> -------------------------------------------------------------------
>
>                 Key: HADOOP-5525
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5525
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.21.0
>
>
> Admin needs to know the status of all threads in JobTracker (whether they are alive or
not) at any point of time. This helps alot in debugging crashes.

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