baiyiwen created ZOOKEEPER-4948:
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Summary: When ZooKeeper client enters AuthFailed state (e.g., due
to SASL authentication failure), calling `close()` method does not terminate
internal SendThread and EventThread.
Key: ZOOKEEPER-4948
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4948
Project: ZooKeeper
Issue Type: Bug
Components: java client
Affects Versions: 3.9.0, 3.7.1, 3.8.0, 3.6.1, 3.4.8
Reporter: baiyiwen
Problem
When ZooKeeper client enters AuthFailed state (e.g., due to SASL authentication
failure),
calling `close()` method does not terminate internal SendThread and EventThread.
Reproduction Steps
1. Configure SASL authentication with invalid credentials
2. Connect to ZooKeeper server
3. Watch receives `KeeperState.AuthFailed` event
4. Call `zookeeper.close()`
5. Observe SendThread/EventThread still running via thread dump
Expected Behavior
All client resources including background threads should be released.
Proposed Fix
Remove state check in close method:
public synchronized void close() throws InterruptedException {
if (cnxn != null) {
cnxn.close();
}
}
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