zookeeper-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From enixon <...@git.apache.org>
Subject [GitHub] zookeeper pull request #628: ZOOKEEPER-3140: Allow Followers to host Observe...
Date Tue, 09 Oct 2018 22:53:53 GMT
Github user enixon commented on a diff in the pull request:

    --- Diff: src/java/main/org/apache/zookeeper/server/quorum/Learner.java ---
    @@ -84,8 +84,12 @@ public Socket getSocket() {
         protected static final Logger LOG = LoggerFactory.getLogger(Learner.class);
    +    private static final int leaderConnectDelayDuringRetryMs =
    +            Integer.getInteger("zookeeper.leaderConnectDelayDuringRetryMs", 100);
    --- End diff --
    The change was inspired by an Observer potentially taking a long time to recover after
a leader election if the first LearnerMaster that it hooked in to was a Follower that was
lagging in syncing with the leader. Rather than fixate on this slow Follower, the Observer
can be moved along to a new LearnerMaster with minimal delay.


View raw message