Xianyang Liu created SPARK-25386:
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Summary: Don't need to synchronize the IndexShuffleBlockResolver
for each writeIndexFileAndCommit
Key: SPARK-25386
URL: https://issues.apache.org/jira/browse/SPARK-25386
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.3.1
Reporter: Xianyang Liu
Now, we need synchronize the instance of IndexShuffleBlockResolver in order to
make the commit check and tmp file rename atomically. This can be improved. We
could synchronize a lock which is different for each `shuffleId + mapId`
instead of synchronize the indexShuffleBlockResolver for each
writeIndexFileAndCommit.
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