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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5883) TaskMemoryMonitorThread might shoot down tasks even if their processes momentarily exceed the requested memory
Date Thu, 21 May 2009 12:53:47 GMT
TaskMemoryMonitorThread might shoot down tasks even if their processes momentarily exceed the
requested memory
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                 Key: HADOOP-5883
                 URL: https://issues.apache.org/jira/browse/HADOOP-5883
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred
            Reporter: Hemanth Yamijala


Currently the TaskMemoryMonitorThread kills tasks as soon as it detects they are consuming
more memory than the max value specified. There are valid cases (see HADOOP-5059) where if
a program is executed from the task, it might momentarily occupy twice the amount of memory
for a short time. Ideally the monitoring thread should handle this case.

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