Mudit Sharma created MAPREDUCE-7339:
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Summary: Default Speculatoor returns speculationValue as
TOO_LATE_TO_SPECULATE or PROGRESS_IS_GOOD eve if the task is ALREADY_SPECULATING
Key: MAPREDUCE-7339
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7339
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: Mudit Sharma
DefaultSpeculator implementation in Mapreduce returns some MAGIC numbers in
speculationValue if the tasks is not a good candidate for speculation. It
returns these values:
{noformat}
returns ALREADY_SPECULATING if that is true. This has priority.
returns TOO_NEW if our companion task hasn't gotten any information
returns PROGRESS_IS_GOOD if the task is sailing through
returns NOT_RUNNING if the task is not running{noformat}
{color:#172b4d}But there is one bug, due to which even if task is speculating,
but if its progress is good or its too late to speculate, code returns
TOO_LATE_TO_SPECULATE or PROGRESS_IS_GOOD and not ALREADY_SPECULATING{color}
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