jeffrey-xiao commented on code in PR #1925:
URL: https://github.com/apache/zookeeper/pull/1925#discussion_r985973680
##########
zookeeper-server/src/main/java/org/apache/zookeeper/server/quorum/Learner.java:
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@@ -760,13 +760,21 @@ protected void syncWithLeader(long newLeaderZxid) throws
Exception {
zk.startupWithoutServing();
if (zk instanceof FollowerZooKeeperServer) {
FollowerZooKeeperServer fzk =
(FollowerZooKeeperServer) zk;
+ fzk.syncProcessor.setDelayForwarding(true);
for (PacketInFlight p : packetsNotLogged) {
fzk.logRequest(p.hdr, p.rec, p.digest);
}
packetsNotLogged.clear();
+ fzk.syncProcessor.syncFlush();
}
writePacket(new QuorumPacket(Leader.ACK, newLeaderZxid,
null, null), true);
+
+ if (zk instanceof FollowerZooKeeperServer) {
+ FollowerZooKeeperServer fzk =
(FollowerZooKeeperServer) zk;
+ fzk.syncProcessor.setDelayForwarding(false);
+ fzk.syncProcessor.syncFlush();
Review Comment:
What's the reason why we need the second `syncFlush`?
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