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Posted to dev@zookeeper.apache.org by "Robert P. Thille (JIRA)" <ji...@apache.org> on 2015/05/08 01:46:59 UTC

[jira] [Created] (ZOOKEEPER-2184) Zookeeper Client should re-resolve hosts when connection attempts fail

Robert P. Thille created ZOOKEEPER-2184:
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             Summary: 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: 3.5.0, 3.4.6
         Environment: Ubuntu 14.04 host, Docker containers for Zookeeper & Kafka
            Reporter: Robert P. Thille


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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