Alexey Serbin has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/9625


Change subject: [consensus] FAILED_UNRECOVERABLE replica health status
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[consensus] FAILED_UNRECOVERABLE replica health status

Added HealthStatus::FAILED_UNRECOVERABLE for a tablet replica. This is
to mark replicas behind which are not able to catch up with the leader
due to GC-collected logs and other unrecoverable cases.

With the introduction of the FAILED_UNRECOVERABLE health status, the
replica management scheme becomes hybrid: the system evicts replicas
with FAILED_UNRECOVERABLE health status before adding a replacement.

This patch is part of the fix to address KUDU-2342.

Change-Id: I35637c5bda6681b732dbc2bbf94b9d4258b12095
---
M src/kudu/consensus/consensus_queue.cc
M src/kudu/consensus/metadata.proto
M src/kudu/consensus/quorum_util-test.cc
M src/kudu/consensus/quorum_util.cc
4 files changed, 186 insertions(+), 106 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/25/9625/1
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I35637c5bda6681b732dbc2bbf94b9d4258b12095
Gerrit-Change-Number: 9625
Gerrit-PatchSet: 1
Gerrit-Owner: Alexey Serbin <aser...@cloudera.com>

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