[kudu-CR] [master] Exclude tservers in MAINTENANCE MODE when leader rebalancing

["Yuqi Du (Code Review)" <ge...@cloudera.org>]

Hello Mahesh Reddy, Tidy Bot, Alexey Serbin, Yingchun Lai, Yifan Zhang, Attila Bukor, Kudu Jenkins, Abhishek Chennaka, KeDeng, Wang Xixu, 

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

    http://gerrit.cloudera.org:8080/19608

to look at the new patch set (#12).

Change subject: [master] Exclude tservers in MAINTENANCE_MODE when leader rebalancing
......................................................................

[master] Exclude tservers in MAINTENANCE_MODE when leader rebalancing

Currently, auto leader rebalancing may transfer new leaders to tservers
which have entered MAINTENANCE_MODE. Because a tserver in MAINTENANCE_MODE
is being maintained by administrators, maybe it is decommissioning.
Since it might be decommissioned/decommissioning, it doesn't make sense
for the leader rebalancer to transfer a leader to a tserver in MAINTENANCE_MODE
as leaders serve many users' requests. For this reason, we should exclude
such tservers.

This patch fixes the problem and adds an unit test for this.

Change-Id: I2f85a675e69fd02a62e2625881dad2ca5e27acd9
---
M src/kudu/master/auto_leader_rebalancer-test.cc
M src/kudu/master/auto_leader_rebalancer.cc
M src/kudu/master/auto_leader_rebalancer.h
3 files changed, 95 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/08/19608/12
-- 
To view, visit http://gerrit.cloudera.org:8080/19608
To unsubscribe, visit http://gerrit.cloudera.org:8080/settings

Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I2f85a675e69fd02a62e2625881dad2ca5e27acd9
Gerrit-Change-Number: 19608
Gerrit-PatchSet: 12
Gerrit-Owner: Yuqi Du <sh...@gmail.com>
Gerrit-Reviewer: Abhishek Chennaka <ac...@cloudera.com>
Gerrit-Reviewer: Alexey Serbin <al...@apache.org>
Gerrit-Reviewer: Attila Bukor <ab...@apache.org>
Gerrit-Reviewer: KeDeng <kd...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Mahesh Reddy <mr...@cloudera.com>
Gerrit-Reviewer: Tidy Bot (241)
Gerrit-Reviewer: Wang Xixu <14...@qq.com>
Gerrit-Reviewer: Yifan Zhang <ch...@163.com>
Gerrit-Reviewer: Yingchun Lai <la...@apache.org>
Gerrit-Reviewer: Yuqi Du <sh...@gmail.com>