Dovecot - Upgrade Solr 7.7.2 to 8.4.1

[deano-dovecot at areyes.com]

On 2020-01-22 8:42 am, Domenico Pastore wrote:
> Hello,
> I have Dovecot configured with Solr for the indexes.
> 
> I have need your support for upgrade solr 7.7.2 to 8.4.1.
> Solr 7.7.2 has a security issue CVE-2019-12409.
> 
> It's possible upgrade of Solr?
> Dovecot work correctly with Solr 8.x?
> 
> The Solr documentation recommended after updating:
> "It is always strongly recommended that you fully reindex your
> documents after a major version upgrade."
> 
> There are tips for Dovecot?

Easy mitigation - block or control all access on port 18983 via iptables 
?  Might be a bit of a blanket statement though ...

Be aware than later version of Solr use a *lot* more ram.  I tested last 
year with 8.3.0 and even with tuning was seeing a much higher higher RES 
memory usage.

DC