Do not update term from unreachable members 76/82876/10
authorTomas Cere <tomas.cere@pantheon.tech>
Tue, 2 Jul 2019 07:58:13 +0000 (09:58 +0200)
committerRobert Varga <nite@hq.sk>
Fri, 27 Sep 2019 04:58:29 +0000 (04:58 +0000)
commit7aaff9ef1da193ee421541db1a5b57a7cbf51fb2
tree7e26037da7a33a12e0da5c238ea55f077621af12
parente373f634d72fa6ef692d4fd0d016c6deeba8ffe8
Do not update term from unreachable members

In case of a one way connection problem, a follower that cannot
receive messages but can send them, it will change into Candidate
and continuosly bump its term while it cannot receive any
RequestVoteReplies.

Since the messages it sends can actually get through, this means
that the healthy part of the cluster will have its leader dropped
every 2 election timeouts.

Change this up so we only update term when receiving a RequestVote
from a reachable node.

Change-Id: Ia8a0b59cfb2d0cd68096172a1d2d47f68e7ed473
Signed-off-by: Tomas Cere <tomas.cere@pantheon.tech>
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractLeader.java
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractRaftActorBehavior.java
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Follower.java
opendaylight/md-sal/sal-distributed-datastore/pom.xml
opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/DistributedDataStoreRemotingIntegrationTest.java

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