eolivelli commented on code in PR #2069:
URL: https://github.com/apache/zookeeper/pull/2069#discussion_r1342082628
##########
zookeeper-server/src/main/java/org/apache/zookeeper/server/quorum/Leader.java:
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@@ -915,22 +934,30 @@ private long getDesignatedLeader(Proposal
reconfigProposal, long zxid) {
* @return True if committed, otherwise false.
**/
public synchronized boolean tryToCommit(Proposal p, long zxid,
SocketAddress followerAddr) {
+ // in order to be committed, a proposal must be accepted by a quorum.
+ //
+ // getting a quorum from all necessary configurations.
+ if (!p.hasAllQuorums()) {
+ return false;
+ }
+
// make sure that ops are committed in order. With reconfigurations it
is now possible
// that different operations wait for different sets of acks, and we
still want to enforce
// that they are committed in order. Currently we only permit one
outstanding reconfiguration
// such that the reconfiguration and subsequent outstanding ops
proposed while the reconfig is
// pending all wait for a quorum of old and new config, so it's not
possible to get enough acks
// for an operation without getting enough acks for preceding ops. But
in the future if multiple
// concurrent reconfigs are allowed, this can happen.
- if (outstandingProposals.containsKey(zxid - 1)) {
- return false;
- }
-
- // in order to be committed, a proposal must be accepted by a quorum.
- //
- // getting a quorum from all necessary configurations.
- if (!p.hasAllQuorums()) {
- return false;
+ Proposal previous = outstandingProposals.get(zxid - 1);
Review Comment:
This change seems unrelated
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