Hello Tidy Bot, Kudu Jenkins, Adar Dembo,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/15035
to look at the new patch set (#2).
Change subject: KUDU-3011 p6: don't transfer leadership to quiescing followers
......................................................................
KUDU-3011 p6: don't transfer leadership to quiescing followers
When a tablet server is quiescing, any followers hosted on it should not
be considered candidates to be the leader's successor.
A quiescing follower already would never become a leader because it
would reject the StartElection request immediately. This patch improves
upon this by nipping such requests in the bud. Followers will now send
along with their ConsensusResponses whether or not they're quiescing,
and if they are, the leader will know not to transfer leadership to it.
I considered another approach to reducing the number of fruitless RPCs
sent -- simply throttling the interval with which a leader can send
StartElection requests. I opted to go with the current approach since it
is more complete with regards to preventing extraneous StartElection
requests.
Change-Id: I74ec79d0bc4dbe42fce0cca2e001cd0b369cd066
---
M src/kudu/consensus/consensus.proto
M src/kudu/consensus/consensus_queue-test.cc
M src/kudu/consensus/consensus_queue.cc
M src/kudu/consensus/consensus_queue.h
M src/kudu/consensus/raft_consensus.cc
M src/kudu/integration-tests/tablet_server_quiescing-itest.cc
6 files changed, 49 insertions(+), 1 deletion(-)
git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/35/15035/2
--
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I74ec79d0bc4dbe42fce0cca2e001cd0b369cd066
Gerrit-Change-Number: 15035
Gerrit-PatchSet: 2
Gerrit-Owner: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Adar Dembo <a...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)
