[jira] [Created] (HDFS-9805) TCP_NODELAY not set before SASL handshake in data transfer pipeline

["Gary Helmling (JIRA)" <ji...@apache.org>]

Gary Helmling created HDFS-9805:
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             Summary: TCP_NODELAY not set before SASL handshake in data transfer pipeline
                 Key: HDFS-9805
                 URL: https://issues.apache.org/jira/browse/HDFS-9805
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
            Reporter: Gary Helmling
            Assignee: Gary Helmling


There are a few places in the DN -> DN block transfer pipeline where TCP_NODELAY is not set before doing a SASL handshake:

* in {{DataNode.DataTransfer::run()}}
* in {{DataXceiver::replaceBlock()}}
* in {{DataXceiver::writeBlock()}}




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