[ https://issues.apache.org/jira/browse/MAPREDUCE-717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12732412#action_12732412 ]
Devaraj Das commented on MAPREDUCE-717: --------------------------------------- Also disabled speculation for recovered jobs (jobs that are recovered after a JT restart). That part needs some more thought... > Fix some corner case issues in speculative execution (post hadoop-2141) > ----------------------------------------------------------------------- > > Key: MAPREDUCE-717 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-717 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: jobtracker > Affects Versions: 0.21.0 > Reporter: Devaraj Das > Assignee: Devaraj Das > Fix For: 0.21.0 > > Attachments: 717.patch, 717.patch > > > Some corner case issues can be fixed: > 1) Setup task should not add anything to the job statistics (since they are > really fast and might affect the statistics of a job with few tasks) > 2) The statistics computations should be guarded for cases where things like > sumOfSquares could become less than zero (due to rounding errors mostly). > 3) The method TaskInProgress.getCurrentProgressRate() should take into > account the COMMIT_PENDING state > 4) The testcase TestSpeculativeExecution.testTaskLATEScheduling could be made > more robust -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.