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Posted to dev@zookeeper.apache.org by "Raul Gutierrez Segales (JIRA)" <ji...@apache.org> on 2015/11/08 22:05:10 UTC
[jira] [Commented] (ZOOKEEPER-2184) Zookeeper Client should
re-resolve hosts when connection attempts fail
[ https://issues.apache.org/jira/browse/ZOOKEEPER-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14995806#comment-14995806 ]
Raul Gutierrez Segales commented on ZOOKEEPER-2184:
---------------------------------------------------
[~fpj], [~rthille]: moving this to 3.4.8 (happy to help with the review when you've sorted the above comments)
> Zookeeper Client should re-resolve hosts when connection attempts fail
> ----------------------------------------------------------------------
>
> Key: ZOOKEEPER-2184
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2184
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.4.6, 3.5.0
> Environment: Ubuntu 14.04 host, Docker containers for Zookeeper & Kafka
> Reporter: Robert P. Thille
> Assignee: Robert P. Thille
> Labels: easyfix, patch
> Fix For: 3.4.8, 3.5.2
>
> Attachments: ZOOKEEPER-2184.patch
>
>
> Testing in a Docker environment with a single Kafka instance using a single Zookeeper instance. Restarting the Zookeeper container will cause it to receive a new IP address. Kafka will never be able to reconnect to Zookeeper and will hang indefinitely. Updating DNS or /etc/hosts with the new IP address will not help the client to reconnect as the zookeeper/client/StaticHostProvider resolves the connection string hosts at creation time and never re-resolves.
> A solution would be for the client to notice that connection attempts fail and attempt to re-resolve the hostnames in the connectString.
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