curator-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aldrin Seychell (Jira)" <j...@apache.org>
Subject [jira] [Commented] (CURATOR-519) Curator 4.0.x/4.1.x release using Zookeeper 3.5.5
Date Thu, 05 Sep 2019 10:09:00 GMT

    [ https://issues.apache.org/jira/browse/CURATOR-519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16923249#comment-16923249
] 

Aldrin Seychell commented on CURATOR-519:
-----------------------------------------

I had opened a PR on github for this: [https://github.com/apache/curator/pull/314]

> Curator 4.0.x/4.1.x release using Zookeeper 3.5.5 
> --------------------------------------------------
>
>                 Key: CURATOR-519
>                 URL: https://issues.apache.org/jira/browse/CURATOR-519
>             Project: Apache Curator
>          Issue Type: Wish
>          Components: General
>    Affects Versions: 4.0.1, 4.1.0
>            Reporter: Raúl Gracia Tinedo
>            Priority: Major
>              Labels: easyfix
>
> We are using Curator 4.0.1 in our project (Pravega, [https://github.com/pravega/pravega]).
> Just for context, we are intensively deploying Pravega on Kubernetes. In this sense,
Zookeeper (3.5.4-beta) is also being deployed as a service in Kubernetes. In this environment,
Zookeeper instances (i.e., pods) can be frequently restarted or relocated and their IP may
change. Properly handling this situation requires to re-resolve the IP for hostname of Zookeeper
instances.
> In fact, we are experiencing problems with this exact issue with Curator 4.0.1 (i.e.,
re-resolution of Zookeeper hostnames), which internally uses Zookeeper 3.5.3-beta as a dependency.
Details can be found in this GitHub issue: [https://github.com/pravega/pravega/issues/3651]
>  
> Fortunately, the proper resolution of Zookeepr hostnames has been actually reported
and fixed in the Zookeeper project:
>  - Issue: https://issues.apache.org/jira/browse/ZOOKEEPER-2184
>  - Commit on Zookeeper 3.5.5 branch: [https://github.com/apache/zookeeper/commit/1e65b9f4873fc995308972433ea8a664e98fe41f]
>  
> To verify that it helps us to solve our problem, I have built a custom Curator 4.0.1
library using Zookeeper 3.5.5 and then I used that library to build a Pravega image. A couple
of comments to take into account:
>  - Using Zookeeper 3.5.5 to build Curator 4.0.1 required no code change, just changing
the Zookeeper dependency version in the pom.xml (I had the same experience with Curator 4.1.0).
>  - I verified that using Curator 4.0.1 and 4.1.0 with Zookeeper 3.5.5 solves the re-resolution
of Zookeeper hostnames, which makes our system able to properly handle Zookeeper instance
restarts.
>  
> Therefore, the main point of this issue is: _is in the roadmap to release Curator 4.0.x
and/or 4.1.x using Zookeeper 3.5.5?_ (Note that Zookeeper 3.5.5 is about to get released:
[https://github.com/apache/zookeeper/releases])
>  
> Thanks in advance,
>  Raúl.



--
This message was sent by Atlassian Jira
(v8.3.2#803003)

Mime
View raw message