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https://issues.apache.org/jira/browse/ZOOKEEPER-805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12920875#action_12920875
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Andras Kovi commented on ZOOKEEPER-805:
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Hi, I'm new to Zookeeper but stumbled upon this bug too. The solution is to add
the -q1 parameter to nc.
The reason is that by default nc closes the connection as soon as the stdin
closes. With -q1 you can override this behavior.
Hope this helps.
> four letter words fail with latest ubuntu nc.openbsd
> ----------------------------------------------------
>
> Key: ZOOKEEPER-805
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-805
> Project: Zookeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.3.1, 3.4.0
> Reporter: Patrick Hunt
> Priority: Critical
> Fix For: 3.3.2, 3.4.0
>
>
> In both 3.3 branch and trunk "echo stat|nc localhost 2181" fails against the
> ZK server on Ubuntu Lucid Lynx.
> I noticed this after upgrading to lucid lynx - which is now shipping openbsd
> nc as the default:
> OpenBSD netcat (Debian patchlevel 1.89-3ubuntu2)
> vs nc traditional
> [v1.10-38]
> which works fine. Not sure if this is a bug in us or nc.openbsd, but it's
> currently not working for me. Ugh.
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