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https://issues.apache.org/jira/browse/ZOOKEEPER-2171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Raul Gutierrez Segales updated ZOOKEEPER-2171:
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Attachment: ZOOKEEPER-2171.patch
This only fixes the calls in QCM. There are many other places where this
happens (as mentioned by [~fournc]), though doing it in the QCM is specially
bad because it could prevent a quorum from forming if DNS is unavailable during
that time.
Also, it does not remove
src/java/main/org/apache/zookeeper/common/HostNameUtils.java so that we can
keep commits that break Java 6 self-contained.
> avoid reverse lookups in QuorumCnxManager
> -----------------------------------------
>
> Key: ZOOKEEPER-2171
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2171
> Project: ZooKeeper
> Issue Type: Bug
> Components: quorum
> Reporter: Raul Gutierrez Segales
> Assignee: Raul Gutierrez Segales
> Fix For: 3.5.1, 3.6.0
>
> Attachments: ZOOKEEPER-2171.patch
>
>
> Apparently, ZOOKEEPER-107 (via a quick git-blame look) introduced a bunch of
> getHostName() calls in QCM. Besides the overhead, these can cause problems
> when mixed with failing/mis-configured DNS servers.
> It would be nice to reduce them, if that doesn't affect operational
> correctness.
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