I have Solr FTS enabled in dovecot. It is behaving differently than I would expect.
When I delete messages in Thunderbird normally, using IMAP to talk to dovecot, the deletion hits Solr right away. If I then ask Thunderbird to empty the trash, that delete also hits Solr immediately.
But if I use shift-delete in Thunderbird, which deletes the message immediately without going through Trash, things are different. One delete that I did (6 messages) took at least a minute before Solr saw the request. And on other tests that I ran, deleting one message, I never did see the delete request hit Solr. I waited for several minutes.
I use the shift-delete mechanism a lot more than the method that sends to trash. That way I do not need to remember to empty the trash.
Dovecot version is 2:2.3.16-2+ubuntu20.04 installed from the dovecot repo, not from distro packages. I don't think the Solr version matters, but just in case I am wrong, that is 8.10.1. I don't recall exactly what I changed in the solrconfig.xml and managed-schema files, but it should not be anything that affects how Solr FTS works. The problem seems to be that Solr FTS isn't sending deletes, not that Solr is behaving incorrectly.
I just discovered that trying to get the dovecot config failed:
root@bilbo:~# doveconf -n # 2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.16 (09c29328) doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/10-master.conf line 64: Invalid size: $default_vsz_limit
After fixing that, this is what I get for the config:
root@bilbo:/etc/dovecot# doveconf -n # 2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.16 (09c29328) # OS: Linux 5.11.0-1020-aws x86_64 Ubuntu 20.04.3 LTS ext4 # Hostname: REDACTED default_vsz_limit = 1 G dict { quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } first_valid_uid = 150 last_valid_uid = 150 listen = * mail_gid = mail mail_location = maildir:/var/vmail/%d/%u mail_plugins = " quota fts fts_solr" mail_privileged_group = mail mail_uid = vmail managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { fts = solr fts_autoindex = yes fts_solr = url=http://localhost:8983/solr/dovecot/ quota = dict:User quota::proxy::quota quota_grace = 10%% quota_max_mail_size = 100M quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full quota_status_success = DUNNO sieve = file:/var/vmail/sieve/%d/%u/sieve;active=/var/vmail/sieve/%d/%u/.dovecot.sieve sieve_default = file:/var/vmail/global.sieve } postmaster_address = postmaster@REDACTED protocols = " imap lmtp sieve pop3" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-userdb { group = mail mode = 0666 user = vmail } } service dict { unix_listener dict { group = postfix mode = 0660 user = vmail } } service imap { vsz_limit = 1 G } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert =
I repeated the delete test after fixing the config and there was no change -- the delete request never made it to Solr.
Reindexing completely for my dovecot install takes about 8 minutes. I have less than 150K messages. Reindexing for some could take hours or days. This is what I use to initiate a full reindex:
root@bilbo:~# cat /usr/local/sbin/reindexsolr #!/bin/sh DOVECOT_SOLR_URL_BASE="http://localhost:8983/solr/dovecot" DEL_ALL_QUERY_XML="<delete><query>*:*</query></delete>" MAIL_ROOT=/var/vmail
service dovecot stop
curl
"${DOVECOT_SOLR_URL_BASE}/update?commit=true&optimize=true"
-H "Content-Type: text/xml"
--data-binary "${DEL_ALL_QUERY_XML}"
find ${MAIL_ROOT} -name "dovecot.index*" -print0 | xargs -0 rm -f
service dovecot start
doveadm index -A -q '*'