hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Todd Lipcon <t...@cloudera.com>
Subject Re: [VOTE] Commit hdfs-1024 to 0.20 branch
Date Fri, 02 Apr 2010 17:41:22 GMT
On Fri, Apr 2, 2010 at 10:38 AM, Stack <stack@duboce.net> wrote:

> Please on committing HDFS-1024 to the hadoop 0.20 branch.
> Background:
> HDFS-1024 fixes possible trashing of fsimage because of failed copy
> from 2NN and NN.  Ordinarily, possible corruption of this proportion
> would merit commit w/o need of a vote only Dhruba correctly notes that
> UNLESS both NN and 2NN are upgraded, HDFS-1024 becomes an incompatible
> change (the NN<->2NN communication will fail always).  IMO, this
> incompatible change can be plastered over with a release note; e.g.
> WARNING, you MUST update NN and 2NN when you go to 0.20.3 hadoop.  If
> you agree with me, please vote +1 on commit.

+1. If I recall correctly the NN and 2NN already do a very strict version
check in branch 20, so it's not any more incompatible than any other change.
(I think Dhruba made the version check less strict in the FB branch)


Todd Lipcon
Software Engineer, Cloudera

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message