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https://issues.apache.org/jira/browse/ZOOKEEPER-4565?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mate Szalay-Beko resolved ZOOKEEPER-4565.
-----------------------------------------
Fix Version/s: 3.9.0
Resolution: Fixed
Issue resolved by pull request 1899
[https://github.com/apache/zookeeper/pull/1899]
> Config watch path get truncated abnormally and fail chroot zookeeper client
> ---------------------------------------------------------------------------
>
> Key: ZOOKEEPER-4565
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4565
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.6.3, 3.8.0, 3.7.1, 3.9.0
> Reporter: Kezhu Wang
> Assignee: Kezhu Wang
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.9.0
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> {{ClientCnxn}} strips off {{chrootPath}} for notifications. This strip could
> break "/zookeeper/config" to illegal zookeeper path(aka. not start with "/")
> and fail zookeeper client due to index out of bound exception in
> {{PathParentIterator.next}}.
> {code:java}
> // convert from a server path to a client path
> if (chrootPath != null) {
> String serverPath = event.getPath();
> if (serverPath.compareTo(chrootPath) == 0) {
> event.setPath("/");
> } else if (serverPath.length() > chrootPath.length()) {
>
> event.setPath(serverPath.substring(chrootPath.length()));
> } else {
> LOG.warn("Got server path {} which is too short for
> chroot path {}.",
> event.getPath(), chrootPath);
> }
> }
> {code}
> I think we could make this strip similar to c client version {{sub_string}}
> and warns only for not "/zookeeper" nodes.
> I found this issue in reproducing CURATOR-593 and CURATOR-611. And the
> consequences are different in 3.6.3 and before.
> * Before 3.6.3(exclusive), watcher of {{getConfig}} will receive event with
> illegal path.
> * After 3.6.3(inclusive), the client will disconnect due to exception from
> {{ZKWatchManager.addPersistentWatches}} which calls
> {{PathParentIterator.forAll}}. See codes from
> [3.6.3|https://github.com/apache/zookeeper/blob/release-3.6.3/zookeeper-server/src/main/java/org/apache/zookeeper/ZooKeeper.java#L627]
> and
> [3.7+|https://github.com/apache/zookeeper/blob/release-3.7.0/zookeeper-server/src/main/java/org/apache/zookeeper/ZKWatchManager.java#L450].
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