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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9151) Include RPC error info in RpcResponseHeader instead of sending it separately
Date Fri, 04 Jan 2013 21:16:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544262#comment-13544262

Todd Lipcon commented on HADOOP-9151:

bq. Do you know how many production deployments are there on apache 2.0.2-alpha? Why they
will be reluctant to upgrade their entire stack, inspite of having chosen an alpha release
and what justifies the expectation of wire compatibility that has never been promised on Apache

I don't have a scientific answer to that - haven't done any survey or anything. Non-scientifically,
I just searched the hadoop-user list for the last couple of months and I see several questions
per week pertaining to 2.x releases. I also see a couple questions per week pertaining to
NameNode HA, Federation, or other 2.0-only features.  BigTop 0.5.0, which was just released,
also bundles 2.0.2-alpha. So even though we've labeled it "alpha", I think it is being treated
as de facto stable by a lot of folks who have deployed it.

Cloudera hat: Again I don't have exact figures, but a significant portion of our paying customers
are running HDFS 2.0.x in production environments. You may claim it's a bad idea because of
the labeling, but in practice it has been stable for them and aside from the labeling I think
we should treat it as such.

Again, if there's a really necessary patch to address something like a security hole, by all
means let's break compatibility. But what amounts to a small code cleanup with no advantage
to our user base, why hurt them?
> Include RPC error info in RpcResponseHeader instead of sending it separately
> ----------------------------------------------------------------------------
>                 Key: HADOOP-9151
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9151
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Sanjay Radia
>            Assignee: Sanjay Radia
>         Attachments: HADOOP-9151.patch

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