Filed https://issues.apache.org/jira/browse/HBASE-28153.

If there are no objections, I will provide a PR there to upgrade the
zookeeper version to 3.8.x on branch-2+.

For branch-2.4, I prefer we just leave it as is because soon it will be EOL.

For branch-2.5, I think it depends on the RM's opinion.

Thanks.

张铎(Duo Zhang) <[email protected]> 于2023年10月12日周四 10:47写道:
>
> Bump.
>
> There is a new CVE in zookeeper before 3.7.2.
>
> https://nvd.nist.gov/vuln/detail/CVE-2023-44981
>
> I think maybe it is time for us to bump the zookeeper version now.
>
> Thanks.
>
> 张铎(Duo Zhang) <[email protected]> 于2023年3月16日周四 18:27写道:
> >
> > We only use Curator in hbase-examples IIRC, so it should be OK to upgrade 
> > it.
> >
> > For ZooKeeper, besides client server wire compatibility, we also need to 
> > consider java compatibility. For example, different protobuf versions can 
> > communicate with each other, but if you depend on protobuf 2.5 and 3.x in 
> > the java project, you will be in trouble as the classes are different...
> >
> > So the question here is, if we upgrade ZooKeeper to 3.8.x, will it break 
> > downstream users who are still on ZooKeeper 3.6.x or 3.7.x?
> >
> > Thanks.
> >
> > Villő Szűcs <[email protected]> 于2023年2月28日周二 22:33写道:
> >>
> >> Hi,
> >> I’d like to upgrade zookeeper in hbase (and in other components as well) to
> >> 3.8.1 version and curator to 5.4.0 version.
> >> It is useful since the current zookeeper version 3.5.7 is EOL and we should
> >> release HBASE 3 with the latest zookeeper to be on an active version.
> >> ZooKeeper clients from 3.5.x onwards are fully compatible with 3.8.x
> >> servers. ZooKeeper 3.8.x clients are compatible with 3.5.x, 3.6.x and 3.7.x
> >> servers as long as we are not using new APIs not present these versions.
> >> See ZooKeeper 3.8.0 Release Notes[1] for details.
> >> Curator 5.0 contains a few non-backward compatible/breaking changes from
> >> previous versions: https://curator.apache.org/breaking-changes.html, but
> >> these changes have no effect on hbase. See Curator Release Notes[2] for
> >> details.
> >> Do you have any suggestions?
> >>
> >> [1] https://zookeeper.apache.org/doc/r3.8.0/releasenotes.html
> >> [2] https://cwiki.apache.org/confluence/display/CURATOR/Releases

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