lei w created HDFS-17339:
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Summary: BPServiceActor should skip cacheReport when one blockPool
does not have CacheBlock on this DataNode
Key: HDFS-17339
URL: https://issues.apache.org/jira/browse/HDFS-17339
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: lei w
Now, DataNode will cacheReport to all NameNode when CacheCapacitySize is not
zero. But sometimes, not all NameNodes have CacheBlock on this DataNode. So
BPServiceActor should skip cacheReport when one blockPool does not have
CacheBlock on this DataNode. If so, the NameNode will reduce unnecessary lock
contention
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