Hi,

we have some issues related to the fts_enforced option in dovecot config.

Following the table in the docs (https://doc.dovecot.org/settings/plugin/fts-plugin/#plugin-fts-setting-fts-e...), we cannot figure out the current behavior of the flag.

In our case we have dovecot up and running, dovecot indexes updated using doveadm command (fts rescan/index), but solr instance offline for testing.

We try to search using header subject. We tried "yes" and "body" fts_enforced flag's options but we get in telnet session:

C: a search header subject "test" S: a NO [SERVERBUG] Internal error occurred. Refer to server log for more information. [2021-04-20 15:52:57] (0.005 + 0.000 + 0.004 secs).

But dovecot-log don't include any specific error, except for a generic:

Apr 20 15:52:57 imap dovecot: imap(test@emailtest.net) session=<t7RIwxyaxMxbj8Qu>: Error: fts_solr: Lookup failed: connect(10.0.0.2:8983) failed: Connection refused

Is there any flag or method to check if a solr instance is up and running and, eventually, switching to the internal dovecot indexes instead ?

Using the "no" option, for enforced flag, for us is unavailable because the related search could be too long and we could have timeout waiting the results.

We aim to achieve the following result: if our solr instance is unavailable, we should switch the imap searches from full-text to headers only.

Could you suggest something in this direction? We running doveoct 2.3.14.

Thanks

-- Alessio Cecchi Postmaster @ http://www.qboxmail.it https://www.linkedin.com/in/alessice