tisonkun commented on code in PR #2064:
URL: https://github.com/apache/zookeeper/pull/2064#discussion_r1330461225
##########
zookeeper-server/src/main/java/org/apache/zookeeper/server/PrepRequestProcessor.java:
##########
@@ -735,10 +735,18 @@ private String getParentPathAndValidate(String path)
throws BadArgumentsExceptio
}
private static int checkAndIncVersion(int currentVersion, int
expectedVersion, String path) throws KeeperException.BadVersionException {
- if (expectedVersion != -1 && expectedVersion != currentVersion) {
- throw new KeeperException.BadVersionException(path);
+ if (expectedVersion != -1) {
+ if (expectedVersion != currentVersion) {
+ throw new KeeperException.BadVersionException(path);
+ }
+ if (expectedVersion == -2) {
+ return 0;
+ } else {
+ return currentVersion + 1;
+ }
+ } else {
+ return currentVersion + 1;
Review Comment:
In this way, we can avoid mentioning `-2` as a new magic number. `-2` is
special because `-1` is special - let's talk about -1 instead converged.
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