Andor Molnar created ZOOKEEPER-5059:
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Summary: Kerberos SASL leaks Login refresh threads across
QuorumPeer.shutdown()
Key: ZOOKEEPER-5059
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-5059
Project: ZooKeeper
Issue Type: Bug
Components: server
Affects Versions: 3.8.6, 3.9.5
Reporter: Andor Molnar
Assignee: Andor Molnar
ZooKeeper's quorum Kerberos SASL implementation starts background {{Login}} TGT
refresh threads for both quorum server-side and learner-side authentication,
but {{QuorumPeer.shutdown()}} never tears those {{Login}} instances down. In
embedded or repeatedly recycled ZooKeeper deployments, every restart leaves
additional daemon threads alive in the hosting JVM.
The issue is in the quorum mutual-authentication path, not the external client
protocol itself.
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