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Hadoop QA commented on MAPREDUCE-4425: -------------------------------------- {color:green}+1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12552998/MAPREDUCE-4425.patch against trunk revision . {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 1 new or modified test files. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 javadoc{color}. The javadoc tool did not generate any warning messages. {color:green}+1 eclipse:eclipse{color}. The patch built with eclipse:eclipse. {color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 1.3.9) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings. {color:green}+1 core tests{color}. The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app. {color:green}+1 contrib tests{color}. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3009//testReport/ Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3009//console This message is automatically generated. > Speculation + Fetch failures can lead to a hung job > --------------------------------------------------- > > Key: MAPREDUCE-4425 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-4425 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: mrv2 > Affects Versions: 0.23.1 > Reporter: Siddharth Seth > Assignee: Jason Lowe > Priority: Critical > Attachments: MAPREDUCE-4425.patch > > > After a task goes to SUCCEEDED, FAILED/KILLED attempts are ignored. > 1. attemp1 starts > 2. speculative attempt starts > 3. attempt 1 completes - Task moves to SUCCEEDED state > 4. speculative attempt is KILLED > 5. T_ATTEMPT_KILLED is ignored. > 6. attemp1 1 fails with TOO_MANY_FETCH_FAILURES > The job will effectively hang, since a new task attempt isn't started. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira