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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-766) Enhance -list-blacklisted-trackers to display host name, blacklisted reason and blacklist report.
Date Wed, 22 Jul 2009 16:33:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12734183#action_12734183

Hemanth Yamijala commented on MAPREDUCE-766:

Looking good. A few minor points:

- We are changing the way we print information about blacklisted trackers. Does this need
to be backwards compatible ? Similarly, maybe we need not deprecate getBlacklistedTrackerNames()
- The print format should be parse friendly. We are adding white space to separate reasons
for blacklisting and the report can have newlines. These will make it difficult to parse.
Can we make these comma separated ?
- getBlackListedTracker should be getBlackListedTrackers. Similarly getBlackListedTrackerInfo()
should be getBlackListedTrackersInfo() - the former seems like it is for a specific tracker.
- The test class is not applying, possibly due to the commit of MAPREDUCE-682. Also, can you
enhance the test case to test for a condition when no nodes are blacklisted, and when there
is more than one reason to blacklist ? Maybe one of the trackers can be blacklisted for more
than one reason.

> Enhance -list-blacklisted-trackers to display host name, blacklisted reason and blacklist
> -------------------------------------------------------------------------------------------------
>                 Key: MAPREDUCE-766
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-766
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Sreekanth Ramakrishnan
>            Assignee: Sreekanth Ramakrishnan
>         Attachments: mapreduce-766-1.patch, mapreduce-766-2.patch, mapreduce-766-3.patch
> Currently, the -list-blacklisted-trackers in the mapred job option list only tracker
name. We should enhance it to display as hostname, reason for blacklisting and blacklist report.

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