I had some problems trying to upgrade to ZK 3.4.13, see: SOLR-12727 and have never been able to get back to it. If you'd like to take a whack at it that'd be great! Just apply the patch and chime in on the JIRA, frankly I've forgotten the details. I didn't put very much effort into tracking down exactly what was happening, other priorities and all that.
Best, Erick On Wed, Nov 7, 2018 at 1:13 AM Jaroslaw Rozanski <m...@jarekrozanski.eu> wrote: > > Hi all, > > Solr 7.4.x and 7.5.x ships with ZooKeeper 3.4.11. > > Meanwhile official stable ZooKeeper version is 3.4.12 and 3.4.13. The Solr > supported version 3.4.11 has been removed from official distributions > (https://www-eu.apache.org/dist/zookeeper/) I am guessing due to > https://issues.apache.org/jira/browse/ZOOKEEPER-2960. > > > It is _trivial_ to use newer version when using external ZK ensemble however > Solr Documentation > (https://lucene.apache.org/solr/guide/7_5/setting-up-an-external-zookeeper-ensemble.html) > says: > > ---- > When using an external ZooKeeper ensemble, you will need need to keep your > local installation up-to-date with the latest version distributed with Solr. > Since it is a stand-alone application in this scenario, it does not get > upgraded as part of a standard Solr upgrade. > ---- > > > Question: Anyone using ZK 3.4.12/13 and Solr 7.4/7.5 in production with > success? Any noteworthy issues found? > > The release notes from .11 to .12 look pretty harmless on the face of it. > > Thanks, > Jarek > > > > -- > Jaroslaw Rozanski | m...@jarekrozanski.eu
