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https://issues.apache.org/jira/browse/ZOOKEEPER-4817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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gendong1 updated ZOOKEEPER-4817:
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Attachment: node1-60.log
> CancelledKeyException does not work in some cases.
> --------------------------------------------------
>
> Key: ZOOKEEPER-4817
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4817
> Project: ZooKeeper
> Issue Type: Bug
> Affects Versions: 3.10.0
> Reporter: gendong1
> Priority: Major
> Attachments: node1-25.log, node1-60.log, node2-25.log, node2-60.log,
> node3-25.log, node3-60.log
>
>
> If the client connection is disconnected with zoo server,
> cancelledkeyexception will arise.
> Here is a strange scenarios.
> NIOServerCxn.doIO is blocked at line 333 by the fail-slow nic.
> If the delay lasts more than 30s, cancelledkeyexception will disappear.
> If the delay lasts for 25s, cancelledkeyexception will arise.
> When the doIO encounters the slowdown caused by teh fail-slow nic, the
> context is same.
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