[kudu-CR] [tools] KUDU-3487 rebalancer checks the voter num.

["Song Jiacheng (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/20264

to look at the new patch set (#2).

Change subject: [tools] KUDU-3487 rebalancer checks the voter num.
......................................................................

[tools] KUDU-3487 rebalancer checks the voter num.

Replace rebalance for the tables whose replication factor is 1 might
stuck for a long time because the rebalancer send LeaderStepDown request
even if there is no other voter to transfer leadership.

So check the voter num before sending the request.

Change-Id: I3b3d5dfb383719f56a2d32b62d2b659b17928794
---
M src/kudu/tools/tool_replica_util.cc
1 file changed, 3 insertions(+), 1 deletion(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/64/20264/2
-- 
To view, visit http://gerrit.cloudera.org:8080/20264
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I3b3d5dfb383719f56a2d32b62d2b659b17928794
Gerrit-Change-Number: 20264
Gerrit-PatchSet: 2
Gerrit-Owner: Song Jiacheng <so...@thinkingdata.cn>
Gerrit-Reviewer: Kudu Jenkins (120)