Matei Zaharia created SPARK-1775:
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Summary: Unneeded lock in ShuffleMapTask.deserializeInfo
Key: SPARK-1775
URL: https://issues.apache.org/jira/browse/SPARK-1775
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 0.9.0, 1.0.0, 0.9.1
Reporter: Matei Zaharia
This was used in the past to have a cache of deserialized ShuffleMapTasks, but
that's been removed, so there's no need for a lock. It slows down Spark when
task descriptions are large, e.g. due to large lineage graphs or local
variables.
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