[IGNITE-15271] ITNodeTest.testFollowerStartStopFollowing is still flaky

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha2
• Fix Version/s: 3.0.0-alpha4
• Labels: ignite-3
• Assignee: Alexey Scherbakov
• Reporter: Alexey Scherbakov
• Reviewer: Mirza Aliev
• Created: 09/Aug/21 09:15
• Updated: 22/Dec/21 14:53
• Resolved: 21/Dec/21 15:16

Description

org.opentest4j.AssertionFailedError
org.opentest4j.AssertionFailedError: expected: <true> but was: <false>
  at org.apache.ignite.raft.jraft.core.ITNodeTest.testFollowerStartStopFollowing(ITNodeTest.java:2678)

The issue is caused by (unexpected) excessive number of state changes during leader election on term=2:

INFO: onStartFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004, term=2, status=Status[ENEWLEADER<10011>: Follower receives message from new leader with the same term.]].
Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
INFO: onStartFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004, term=2, status=Status[ENEWLEADER<10011>: Follower receives message from new leader with the same term.]].
Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
INFO: onStartFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004, term=2, status=Status[ENEWLEADER<10011>: Follower receives message from new leader with the same term.]].
Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
INFO: onStopFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004, term=2, status=Status[EVOTEFORCANDIDATE<10010>: Raft node votes for some candidate, step down to restart election_timer.]].
Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
WARNING: Node <unitest/172.17.0.6:5004> received invalid RequestVoteResponse from 172.17.0.6:5006, state not in STATE_CANDIDATE but STATE_LEADER.
Aug 09, 2021 9:32:37 AM org.apache.ignite.lang.IgniteLogger logInternal
INFO: onStartFollowing: LeaderChangeContext [leaderId=172.17.0.6:5004, term=2, status=Status[ENEWLEADER<10011>: Follower receives message from new leader with the same term.]].

Issue Links

• is part of: IGNITE-14832 Investigate remaining TODOs in org.apache.ignite.raft.jraft package
• links to: GitHub Pull Request #268