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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-3682) duplicate "Map Completion Events" in tasktracker fetch status
Date Sat, 01 Nov 2008 00:07:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zheng Shao resolved HADOOP-3682.
--------------------------------

    Resolution: Duplicate

Duplicate of a recent bug reported/fixed by Dhruba.

> duplicate "Map Completion Events" in tasktracker fetch status
> -------------------------------------------------------------
>
>                 Key: HADOOP-3682
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3682
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.15.3
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>
> we saw duplicate "MapCompletionEvents" in FetchStatus from TaskTracker. This prevents
the ReduceTask from getting all the map locations, and the ReduceTask is waiting forever.
> This is a printout of the MapCompletionEvents from a FetchStatus from the TaskTracker:
> 988	0	task_200806270248_6185_m_000980_0	980	Map	SUCCEEDED
> 989	0	task_200806270248_6185_m_000787_0	787	Map	SUCCEEDED
> 990	0	task_200806270248_6185_m_000749_0	749	Map	SUCCEEDED
> 991	0	task_200806270248_6185_m_000848_0	848	Map	SUCCEEDED
> 992	0	task_200806270248_6185_m_000919_0	919	Map	SUCCEEDED
> 993	0	task_200806270248_6185_m_000836_0	836	Map	SUCCEEDED
> 994	0	task_200806270248_6185_m_000838_0	838	Map	SUCCEEDED
> 995	0	task_200806270248_6185_m_000936_0	936	Map	SUCCEEDED
> 996	0	task_200806270248_6185_m_000933_0	933	Map	SUCCEEDED
> 997	0	task_200806270248_6185_m_000856_0	856	Map	SUCCEEDED
> 998	0	task_200806270248_6185_m_000885_0	885	Map	SUCCEEDED
> 999	0	task_200806270248_6185_m_000804_0	804	Map	SUCCEEDED
> 1000	0	task_200806270248_6185_m_000986_0	986	Map	SUCCEEDED *first copy begins*
> 1001	0	task_200806270248_6185_m_000999_0	999	Map	SUCCEEDED
> 1002	0	task_200806270248_6185_m_000990_0	990	Map	SUCCEEDED
> 1003	0	task_200806270248_6185_m_000985_0	985	Map	SUCCEEDED
> 1004	0	task_200806270248_6185_m_000968_0	968	Map	SUCCEEDED
> 1005	0	task_200806270248_6185_m_001000_0	1000	Map	SUCCEEDED
> 1006	0	task_200806270248_6185_m_000996_0	996	Map	SUCCEEDED
> 1007	0	task_200806270248_6185_m_000974_0	974	Map	SUCCEEDED
> 1008	0	task_200806270248_6185_m_000998_0	998	Map	SUCCEEDED
> 1009	0	task_200806270248_6185_m_000982_0	982	Map	SUCCEEDED
> 1010	0	task_200806270248_6185_m_001010_0	1010	Map	SUCCEEDED
> 1011	0	task_200806270248_6185_m_000959_0	959	Map	SUCCEEDED
> 1012	0	task_200806270248_6185_m_000991_0	991	Map	SUCCEEDED *first copy ends*
> 1013	0	task_200806270248_6185_m_000986_0	986	Map	SUCCEEDED *second copy begins*
> 1014	0	task_200806270248_6185_m_000999_0	999	Map	SUCCEEDED
> 1015	0	task_200806270248_6185_m_000990_0	990	Map	SUCCEEDED
> 1016	0	task_200806270248_6185_m_000985_0	985	Map	SUCCEEDED
> 1017	0	task_200806270248_6185_m_000968_0	968	Map	SUCCEEDED
> 1018	0	task_200806270248_6185_m_001000_0	1000	Map	SUCCEEDED
> 1019	0	task_200806270248_6185_m_000996_0	996	Map	SUCCEEDED
> 1020	0	task_200806270248_6185_m_000974_0	974	Map	SUCCEEDED
> 1021	0	task_200806270248_6185_m_000998_0	998	Map	SUCCEEDED
> 1022	0	task_200806270248_6185_m_000982_0	982	Map	SUCCEEDED
> 1023	0	task_200806270248_6185_m_001010_0	1010	Map	SUCCEEDED
> 1024	0	task_200806270248_6185_m_000959_0	959	Map	SUCCEEDED
> 1025	0	task_200806270248_6185_m_000991_0	991	Map	SUCCEEDED *second copy ends*

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