[ovs-build] Passed: ovsrobot/ovs#3578 (series_230663 - 0da79a7)

Travis CI builds at travis-ci.com
Tue Feb 23 14:07:41 UTC 2021


Build Update for ovsrobot/ovs
-------------------------------------

Build: #3578
Status: Passed

Duration: 11 mins and 15 secs
Commit: 0da79a7 (series_230663)
Author: Ilya Maximets
Message: raft: Reintroduce jsonrpc inactivity probes.

It's not enough to just have heartbeats.

RAFT heartbeats are unidirectional, i.e. leader sends them to followers
but not the other way around.  Missing heartbeats provokes followers to
start election, but if leader will not receive any replies it will not
do anything while there is a quorum, i.e. there are enough other
servers to make decisions.

This leads to situation that while TCP connection is established,
leader will continue to blindly send messages to it.  In our case this
leads to growing send backlog.  Connection will be terminated
eventually due to excessive send backlog, but this this might take a
lot of time and wasted process memory.  At the same time 'candidate'
will continue to send vote requests to the dead connection on its
side.

To fix that we need to reintroduce inactivity probes that will drop
connection if there was no incoming traffic for a long time and remote
server doesn't reply to the "echo" request.  Probe interval might be
chosen based on an election timeout to avoid issues described in commit
db5a066c17bd.

Fixes: db5a066c17bd ("raft: Disable RAFT jsonrpc inactivity probe.")
Signed-off-by: Ilya Maximets <i.maximets at ovn.org>
Signed-off-by: 0-day Robot <robot at bytheb.org>

View the changeset: https://github.com/ovsrobot/ovs/compare/436ce00da03e^...0da79a7b7040

View the full build log and details: https://travis-ci.com/github/ovsrobot/ovs/builds/217974550?utm_medium=notification&utm_source=email


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