inspired by https://documentation.open-xchange.com/latest/middleware/components/search/crossfolder_fts_in_mail.html
i tried to configure fast fulltext search in Dovecot.
I got a working virtual folder for an All-Folder-Search but dovecot-solr and dovecot-lucene cause a panic in dovecot.
Panic: file fts-search-serialize.c: line 63 (fts_search_deserialize_add_idx): assertion failed: (*idx < buf->used)
With disabled fts-solr or fts-lucene the Search is working but as expected painfully slow.
Googling for this leads to the possible Solution using a dovecot-Version bigger than 2.2.13u1 which is the latest available Version in Univention.: https://www.dovecot.org/list/dovecot/2015-March/100305.html
I would appreciate any help to get fts working.
Maybe there could be already a patched version 2.2.13 because debian shows 2.2.13u3 but i have no idea if this Version would work.
Is it possible to use backports? because there would be version 2.2.27 where i guess this problem could be solved.
Maybe i try to go the wrong way and there is an other/better way to get fulltextsearch in univention/dovecot.