Todd Lipcon has posted comments on this change.

Change subject: Actually support downgrade to version that has LocalConsensus
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Patch Set 1:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/4059/1/src/kudu/master/catalog_manager.cc
File src/kudu/master/catalog_manager.cc:

Line 3177:     // Defaults to true in old versions of Kudu.
> I thought this comment implied that we need only set obsolete_local if it's
I guess the issue is this code in 0.9.1:
todd@todd-ThinkPad-T540p:~/git/kudu$ git grep -A5  'has_local'  0.9.1
0.9.1:src/kudu/consensus/quorum_util.cc:  if (!config.has_local()) {
0.9.1:src/kudu/consensus/quorum_util.cc-    return Status::IllegalState(
0.9.1:src/kudu/consensus/quorum_util.cc-        Substitute("RaftConfig must 
specify whether it is local. RaftConfig: ",
0.9.1:src/kudu/consensus/quorum_util.cc-                   
config.ShortDebugString()));
0.9.1:src/kudu/consensus/quorum_util.cc-  }
0.9.1:src/kudu/consensus/quorum_util.cc-


In other words, if we don't set the 'local' flag, it would default to 'true', 
but has_local() would still return false.


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Gerrit-MessageType: comment
Gerrit-Change-Id: Icded76c6400b4802581671e2e41efb74a47c5ec4
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Mike Percy <mpe...@apache.org>
Gerrit-Reviewer: Adar Dembo <a...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>
Gerrit-HasComments: Yes

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