FTS-lucene errors : language not available for stemming

[David Gessel]

On 2020-05-19 16:48, Stuart Henderson wrote:
> On 2020-05-19, David Gessel <gessel at blackrosetech.com> wrote:
>> I'm getting some log errors with clucene that I am having no luck tracking down on the interwebs.
> This looks relevant:
>
> https://www.mail-archive.com/dovecot@dovecot.org/msg66366.html

Thanks Stuart & Jan - no_snowball seems to have cleared up the errors.

relevant  config now reads:

plugin {
   fts = lucene
   # Lucene-specific settings, good ones are:
   fts_lucene = whitespace_chars=@. mime_parts no_snowball
}


May 20 04:40:50 indexer-worker(gessel at blackrosetech.com)<26130><rw0HDUIXxV6KBwEA0J78UA:4CgkD0IXxV4SZgAA0J78UA>: Error: lucene index /mail/blackrosetech.com/gessel//lucene-indexes: IndexWriter::addDocument() failed (#4): language not available for stemming
May 20 04:40:50 indexer-worker: Error:
May 20 04:40:50 indexer-worker(gessel at blackrosetech.com)<26130><rw0HDUIXxV6KBwEA0J78UA:4CgkD0IXxV4SZgAA0J78UA>: Error: Mailbox Lists.Spamassassin: Mail search failed: Internal error occurred. Refer to server log for more information. [2020-05-20 04:40:50]
May 20 04:40:50 indexer-worker(gessel at blackrosetech.com)<26130><rw0HDUIXxV6KBwEA0J78UA:4CgkD0IXxV4SZgAA0J78UA>: Error: Mailbox Lists.Spamassassin: Transaction commit failed: FTS transaction commit failed: transaction context (attempted to index 2 messages (UIDs 7..8))
May 20 04:45:05 master: Warning: Killed with signal 15 (by pid=81740 uid=0 code=kill)
May 20 04:46:39 indexer-worker(gessel at blackrosetech.com)<87087><5jtvLp8YxV4tVAEA0J78UA:NexHM58YxV4vVAEA0J78UA>: Warning: fts-lucene: Settings have changed, rebuilding index for mailbox

(no further errors, various mailboxes being indexed.)


>> I am considering switch to xapian (solr and java... pls noe) as the
>> port is quite tempting from an ease of integration perspective, but the
>> easiest solution would be to resolve these odd indexing errors.  Anyone
>> have a clue?
> dovecot-fts-xapian is easy to configure, but has a big downside compared
> to solr in that the indexer runs as root.




-David