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Date: Mon, 6 Jun 2016 05:28:10 +0000 (UTC)
From: "Gary Helmling (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12938973.1455323508000.37956.1465190890886@Atlassian.JIRA>
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Subject: [jira] [Commented] (HDFS-9805) TCP_NODELAY not set before SASL
 handshake in data transfer pipeline
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archived-at: Mon, 06 Jun 2016 05:28:12 -0000


    [ https://issues.apache.org/jira/browse/HDFS-9805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15316208#comment-15316208 ] 

Gary Helmling commented on HDFS-9805:
-------------------------------------

[~jojochuang], I have a version that adds in the config already.  I'll take a stab at the unit test and post an update tomorrow.

> 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
>         Attachments: HDFS-9805.002.patch, HDFS-9805.003.patch
>
>
> 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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