[ZOOKEEPER-2687] Deadlock while shutting down the Leader server.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.5.2, 3.6.0
• Fix Version/s: 3.5.3, 3.6.0
• Component/s: server
• Assignee: Mohammad Arshad
• Reporter: Mohammad Arshad
• Created: 08/Feb/17 07:19
• Updated: 18/May/17 03:43
• Resolved: 15/Feb/17 16:24

Description

Leader server enters into deadlock while shutting down. This happens some time only.
The reason and deadlock flow is same as ZOOKEEPER-2380.
shutdown was removed from synchronized block in ZOOKEEPER-2380
Now shutdown is called from synchronized block from another place.

// check leader running status
if (!this.isRunning()) {
    shutdown("Unexpected internal error");
    return;
}

Issue Links

• links to: GitHub Pull Request #176