Viraj Jasani created HDFS-16163:
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Summary: Avoid locking entire blockPinningFailures map
Key: HDFS-16163
URL: https://issues.apache.org/jira/browse/HDFS-16163
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Viraj Jasani
Assignee: Viraj Jasani
In order for mover to exclude pinned blocks in subsequent iteration, we try to
put pinned blocks in a map of blockIds to set of Datanode sources. However,
while updating an entry of this map, we don't need to lock the entire map. We
can use fine-grained concurrency here.
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