Speculative execution does not work properly
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Key: HADOOP-2177
URL: https://issues.apache.org/jira/browse/HADOOP-2177
Project: Hadoop
Issue Type: Bug
Components: mapred
Reporter: Runping Qi
One mapper of my job stuck when it reached 87.7%.
Speculative execution was set to true.
But no speculative execution was fired for that task.
The whole job was stalled.
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