Arpit Agarwal created HDFS-7170:
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Summary: DFSOutputStream should query policies from NameNode
Key: HDFS-7170
URL: https://issues.apache.org/jira/browse/HDFS-7170
Project: Hadoop HDFS
Issue Type: Sub-task
Components: hdfs-client
Affects Versions: HDFS-6581
Reporter: Arpit Agarwal
Per feedback from [~jingzhao] on HDFS-7159.
DFSOutputStream creates the default policy suite locally to determine whether
the LAZY_PERSIST policy is set on a file so it can pass the appropriate flag to
DataNode via writeBlock. It should query the policies from the NameNode.
DFSClient will probably need to cache policies since we can't take the overhead
of an additional RPC call to NameNode per create/append.
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