You are viewing a plain text version of this content. The canonical link for it is here.

Posted to mapreduce-dev@hadoop.apache.org by "Hong Tang (JIRA)" <ji...@apache.org> on 2009/11/06 02:54:32 UTC

[jira] Created: (MAPREDUCE-1191) JobInProgress.createCache() should not add unknown hosts to the host-to-rack location mapping.

JobInProgress.createCache() should not add unknown hosts to the host-to-rack location mapping.
----------------------------------------------------------------------------------------------

                 Key: MAPREDUCE-1191
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1191
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Hong Tang


JobInProgress.createCache() currently would add host names specified in rawsplits to rack "/default-rack" if it does not already know the mapping. This seems to be a bad idea in the sense that a malicious client can submit jobs with many maps whose locations are non-existent hosts and thus consume up JobTracker's memory.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.