+1.  Don't add a Lucene upgrade though :-)

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


On Tue, Jan 3, 2023 at 10:05 AM Michael Gibney <mich...@michaelgibney.net>
wrote:

> Wondering what folks think of backporting some classloading
> deadlock-related fixes:
> https://issues.apache.org/jira/browse/SOLR-16165
> and possibly upgrade to Lucene 9.4
> https://issues.apache.org/jira/browse/SOLR-16442
> particularly considering:
> https://github.com/apache/lucene/pull/11718
>
> The main concerns for all the above are classloading issues. The first
> one (SlotAcc) I think should be backported, since we know it has
> manifested in the wild and it's a very self-contained fix.
>
> I gather based on SOLR-15254 that the deadlock that would be fixed by
> Lucene 9.4 upgrade has also manifested; in fact I'm surprised that we
> haven't seen this issue manifesting more frequently -- maybe it has,
> but it doesn't get reported/diagnosed because it's an issue that's
> mostly likely to manifest on startup (when actual people are likely to
> be paying attention), and is easily "fixed" in the short-term by
> restarting (again)?. There's some discussion at:
> https://issues.apache.org/jira/browse/SOLR-16167
> and
> https://issues.apache.org/jira/browse/SOLR-15254
>
> I wouldn't want to do anything that would substantially delay 9.1.1
> though...
>
> Thoughts?
>
> On Fri, Dec 30, 2022 at 6:17 PM David Smiley <dsmi...@apache.org> wrote:
> >
> > Still looking for a PR approval for the protobuf upgrade:
> > https://github.com/apache/solr/pull/1252
>
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