+1 to put in the ref guide; well put Walter.

~ David Smiley
Apache Lucene/Solr Search Developer
http://www.linkedin.com/in/davidwsmiley


On Wed, Mar 27, 2019 at 10:27 AM Walter Underwood <[email protected]>
wrote:

> I think it is appropriate to have the table in the reference guide. Yes,
> the guide is versioned, but we can’t expect people to manually diff two
> versions to figure out what changed.
>
> If we expect people to upgrade to a new version, we should have the table
> in the reference guide, not hidden in a wiki.
>
> wunder
> Walter Underwood
> [email protected]
> http://observer.wunderwood.org/  (my blog)
>
> On Mar 27, 2019, at 1:24 AM, Jan Høydahl <[email protected]> wrote:
>
> Because the Reference Guide is versioned, we only need to discuss what JDK
> to grab that works with e.g. Solr/Lucene 8. But I think your wiki page is
> great do as an in-depth guide to JDKs and compatibility. Perhaps it can
> just live on the wiki as now, and link to it from the RefGuide?
>
> So on the
> https://lucene.apache.org/solr/guide/7_7/solr-system-requirements.html page,
> right now we just say "You will need the Java Runtime Environment (JRE)
> version 1.8 or higher" and then people to download Oracle Java.
>
> I think instead of linking to only the Oracle paid version, we could say
> something like:
>
> *If you do not have any opinion or requirements on a particular
> distribution or version of Java, we recommend that you install the free,
> Open Source OpenJDK version 11 which is the latest LTS (long term support)
> version. You can download it from many sources such as AdoptOpenJDK
> (link), Amazon Corretto (link), Zulu (link) or Oracle (link). We do not
> endorse any particular vendor. Note that each vendor may have different
> policies for bug- and security fixes, so choose one you are comfortable
> with. You may also find that your Operating System already includes a
> supported version of the JDK.*
>
> *There are also commercial paid version of Java. If your organisation has
> a policy on what vendor or version or Java to use, make sure to consult
> that before deciding.*
>
>
> *For a more in-depth discussion of JDK compatibility, known issues etc for
> various versions of Lucene/Solr and Java, please see xxxxx.*
>
> *For security reasons, Java should be kept up to date on minor versions.
> Never upgrade Java to a higher major version before first checking and
> testing that it is compatible with the version of Solr you have.*
>
> --
> Jan Høydahl, search solution architect
> Cominvent AS - www.cominvent.com
>
> 26. mar. 2019 kl. 16:14 skrev Erick Erickson <[email protected]>:
>
> So I assume everyone thinks I’ve nailed it perfectly with this page?
> https://wiki.apache.org/solr/SolrJavaVersions. ‘cause I haven’t seen much
> feedback.
>
> Look, we give _no_ guidance at this point about whether Lucene/Solr even
> work on Java X. Well, I guess we’re saying Solr 9 works on with Java 11. Or
> at least it will since it’s about to be required.
>
> I don’t particularly care if we say “If you’re upgrading Java, use Java
> 11” for Lucene/Solr 8x or 7x or 6x for that matter. Let’s just get our
> collective act together and give some guidance.
>
>
>
>
>
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