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https://issues.apache.org/jira/browse/ZOOKEEPER-2060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flavio Junqueira updated ZOOKEEPER-2060:
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Summary: Trace bug in NettyServerCnxnFactory (was: Deadlock in
NettyServerCnxnFactory)
> Trace bug in NettyServerCnxnFactory
> -----------------------------------
>
> Key: ZOOKEEPER-2060
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2060
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.4.6, 3.5.0
> Reporter: Ian Dimayuga
> Assignee: Ian Dimayuga
> Fix For: 3.4.7, 3.5.1, 3.6.0
>
> Attachments: ZOOKEEPER-2060.patch, ZOOKEEPER-2060.patch,
> ZOOKEEPER-2060_deadlock_jstack.txt
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> In NettyServerCnxnFactory, high throughput triggers a deadlock.
> This is caused by a channel-buffer-dumping debug statement in
> NettyServerCnxnFactory.java that is executed regardless of log level.
> This code path only executes when the server is throttling, but when it does
> it encounters a race and occasional deadlock between the channel buffer and
> NettyServerCnxn (jstack attached).
> The proposed fix adds the debug logging guard to this statement, similar to
> other existing statements.
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