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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7748) Separate ECN flags from the Status in the DataTransferPipelineAck
Date Fri, 20 Mar 2015 18:25:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14371796#comment-14371796
] 

Anu Engineer commented on HDFS-7748:
------------------------------------

but would that not kill compatibility with old clients ?  It thought that was the point of
this JIRA all together ?

> Separate ECN flags from the Status in the DataTransferPipelineAck
> -----------------------------------------------------------------
>
>                 Key: HDFS-7748
>                 URL: https://issues.apache.org/jira/browse/HDFS-7748
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Haohui Mai
>            Assignee: Anu Engineer
>            Priority: Blocker
>         Attachments: hdfs-7748.001.patch, hdfs-7748.002.patch, hdfs-7748.003.patch
>
>
> Prior to the discussions on HDFS-7270, the old clients might fail to talk to the newer
server when ECN is turned on. This jira proposes to separate the ECN flags in a separate protobuf
field to make the ack compatible on both versions.



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