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Posted to dev@zookeeper.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2018/06/04 10:39:00 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=16500027#comment-16500027 ]
Hadoop QA commented on ZOOKEEPER-2184:
--------------------------------------
+1 overall. GitHub Pull Request Build
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs (version 3.0.1) warnings.
+1 release audit. The applied patch does not increase the total number of release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/1787//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/1787//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/1787//console
This message is automatically generated.
> 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, 3.4.7, 3.4.8, 3.4.9, 3.4.10, 3.5.0, 3.5.1, 3.5.2, 3.5.3, 3.4.11
> Environment: Ubuntu 14.04 host, Docker containers for Zookeeper & Kafka
> Reporter: Robert P. Thille
> Assignee: Andor Molnar
> Priority: Blocker
> Labels: easyfix, patch, pull-request-available
> Fix For: 3.6.0, 3.4.13, 3.5.5
>
> Attachments: ZOOKEEPER-2184.patch
>
> Time Spent: 6h 20m
> Remaining Estimate: 0h
>
> 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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