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https://issues.apache.org/jira/browse/ZOOKEEPER-2330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15044032#comment-15044032
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Raul Gutierrez Segales commented on ZOOKEEPER-2330:
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Oops - thanks Arshad.
> ZooKeeper close API does not close Login thread.
> ------------------------------------------------
>
> Key: ZOOKEEPER-2330
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2330
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.5.0
> Reporter: Arshad Mohammad
> Assignee: Arshad Mohammad
> Fix For: 3.5.2, 3.6.0
>
> Attachments: ZOOKEEPER-2330-01.patch
>
>
> When kerberos is used as authentication mechanism, one login thread runs in
> the background for ZooKeeper client as well ZooKeepr server.
> This problem is related to Zookeeper client and the scenario is as follows:
> # Main application connects to Zookeeper
> {code}
> ZooKeeper zooKeeper = new ZooKeeper(zookeeperConnectionString,
> sessionTimeout, this)
> {code}
> # Completes it is work with zookeeper
> # calls close() on zookeeper, and continues with rest of the application
> specific work
> Thread dump, taken after 3rd step, shows that login thread is still alive
> {code}
> "Thread-1" daemon prio=6 tid=0x04842c00 nid=0x1f04 waiting on condition
> [0x05b7f000]
> java.lang.Thread.State: TIMED_WAITING (sleeping)
> at java.lang.Thread.sleep(Native Method)
> at org.apache.zookeeper.Login$1.run(Login.java:180)
> at java.lang.Thread.run(Thread.java:722)
> {code}
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