Details
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Sub-task
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Status: Closed
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Major
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Resolution: Fixed
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0.23.0
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None
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Reviewed
Description
MR AM creates new JobConf objects unnecessarily in a couple of places in JobImpl and TaskImpl which occupy non-trivial amount of heap.
While working with a 64 bit JVM on 100K maps jobs, with uncompressed pointers, removing those extraneous objects helped in addressing OOM with 2GB AM heap size.