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https://issues.apache.org/jira/browse/BOOKKEEPER-66?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129074#comment-13129074
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Ivan Kelly commented on BOOKKEEPER-66:
--------------------------------------

The check should exist in bookkeeper-server/bin/bookkeeper & 
hedwig-server/bin/hedwig also as in the hadoop solution. Otherwise the user 
would see that tests are all passing, but for some reason, the actual system 
would not work.
                
> use IPv4 for builds
> -------------------
>
>                 Key: BOOKKEEPER-66
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-66
>             Project: Bookkeeper
>          Issue Type: Bug
>            Reporter: Matthieu Morel
>         Attachments: BOOKKEEPER-66.patch
>
>
> On some linux boxes that run a dual IPv6-IPv4 network stack, with IPv6 
> enabled (e.g. debian-based), there is an issue with some java programs, 
> preventing network connections.
> This results in 
> "org.apache.zookeeper.KeeperException$ConnectionLossException: 
> KeeperErrorCode = ConnectionLoss for /ledgers" in BookieZKExpireTest test 
> (for instance) but is actually due to a previous 
> "java.net.NoRouteToHostException: Network is
> unreachable" issue.
> I could reproduce this on a debian 6 for instance, and the issue is similar 
> another one detailed in a Hadoop ticket: 
> https://issues.apache.org/jira/browse/HADOOP-6056
> We should make sure IPv4 is used for builds so that one can build bookkeeper 
> out of the box, without configuration changes to the OS.

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