<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hello, <div class=""><br class=""></div><div class="">I am running recent dovecot 2.3.13 (89f716dc2) within dockerized mailcow setup. </div><div class=""><br class=""></div><div class="">During just another update routine I decided to reindex all mailboxes and some of them fail (timeout) on exactly SAME messages in SAME mailboxes:</div><div class=""><br class=""></div><div class=""><blockquote type="cite" class="">doveadm(u@d):
Error: fts_solr: Indexing failed: Request timed out (Request queued
73.213 secs ago, 1 send attempts in 73.098 secs, 60.597 in http ioloop,
0.000 in other ioloops, connected 127.875 secs ago)<br class="">doveadm(u@d):
Error: Mailbox Sent: Mail search failed: Internal error occurred. Refer
to server log for more information. [2021-01-14 11:23:46]<br class="">doveadm(u@d): Error: Mailbox Sent: Transaction commit failed: FTS transaction commit failed: backend deinit<br class=""></blockquote><br class="">This
error is persistent and affects only some, but always same folders of same mailboxes (i mean solr can't
finish indexing them at all). </div><div class=""><br class=""></div><div class="">I/O is in perfect condition and has no
corruptions. I also tried to do fts rescan which made no change. RAM is fine, I haven't
seen OOM conditions.<br class=""><br class=""></div><div class="">During my research I found <a href="https://www.mail-archive.com/dovecot@dovecot.org/msg76944.html" class="">this discussion</a> which lead me idea of reducing the batch_size to as low as 10 (for testing purposes). Observing SOLR logs during reindexing on the mailbox/folder causing the error I noticed the following strange behaviour. </div><div class=""><br class=""></div><div class="">Firstly, it goes very fast but then always kinda freezes on these messages:</div><div class=""><br class=""></div><div class=""><div class=""></div><blockquote type="cite" class=""><div class="">solr-mailcow_1 | <b class="">2021-01-14 16:05:09.615</b> INFO (qtp524223214-1151) [ x:dovecot-fts] o.a.s.u.p.LogUpdateProcessorFactory [dovecot-fts] webapp=/solr path=/update params={}{add=[6883/78a0ec27b091da5e4054000013681708/u@d (1688878773188952064), 6884/78a0ec27b091da5e4054000013681708/u@d (1688878773203632128), 6885/78a0ec27b091da5e4054000013681708/u@d (1688878773218312192), 6886/78a0ec27b091da5e4054000013681708/u@d (1688878773227749376), 6887/78a0ec27b091da5e4054000013681708/u@d (1688878773237186560), 6888/78a0ec27b091da5e4054000013681708/u@d (1688878773244526592), 6889/78a0ec27b091da5e4054000013681708/u@d (1688878773250818048), 6890/78a0ec27b091da5e4054000013681708/u@d (1688878773259206656), 6891/78a0ec27b091da5e4054000013681708/u@d (1688878773272838144), 6892/78a0ec27b091da5e4054000013681708/u@d (1688878773288566784)]} 0 101</div><div class="">solr-mailcow_1 | <b class="">2021-01-14 16:06:42.540</b> INFO (qtp524223214-1143) [ x:dovecot-fts] o.a.s.u.p.LogUpdateProcessorFactory [dovecot-fts] webapp=/solr path=/update params={}{add=[6893/78a0ec27b091da5e4054000013681708/u@d (1688878773329461248), 6894/78a0ec27b091da5e4054000013681708/u@d (1688878773332606976), 6895/78a0ec27b091da5e4054000013681708/u@d (1688878774361260032), 6896/78a0ec27b091da5e4054000013681708/u@d (1688878850290745344), 6897/78a0ec27b091da5e4054000013681708/u@d (1688878851347709952), 6898/78a0ec27b091da5e4054000013681708/u@d (1688878852404674560), 6899/78a0ec27b091da5e4054000013681708/u@d (1688878853586419712), 6900/78a0ec27b091da5e4054000013681708/u@d (1688878870704422912), 6901/78a0ec27b091da5e4054000013681708/u@d (1688878870709665792), 6902/78a0ec27b091da5e4054000013681708/u@d (1688878870727491584)]} 0 92891</div></blockquote></div><div class=""><br class=""></div><div class="">It takes almost one and a half minute to get those ten messages (6893-6902) indexed. It freezes exactly on that position every time I restart indexing. Actually only reducing the batch_size to 10 made it through. It was timing out with the default batch_size exactly here each time. </div><div class=""><br class=""></div><div class="">Than it goes further again blazing fast until it reaches here:</div><div class=""><br class=""></div><div class=""><div class=""></div><blockquote type="cite" class=""><div class="">solr-mailcow_1 | <b class="">2021-01-14 16:07:26.148</b> INFO (qtp524223214-1151) [ x:dovecot-fts] o.a.s.u.p.LogUpdateProcessorFactory [dovecot-fts] webapp=/solr path=/update params={}{add=[7443/78a0ec27b091da5e4054000013681708/u@d (1688878884286627840), 7444/78a0ec27b091da5e4054000013681708/u@d (1688878884293967872), 7445/78a0ec27b091da5e4054000013681708/u@d (1688878884304453632), 7446/78a0ec27b091da5e4054000013681708/u@d (1688878884502634496), 7447/78a0ec27b091da5e4054000013681708/u@d (1688878900331937792), 7448/78a0ec27b091da5e4054000013681708/u@d (1688878900508098560), 7449/78a0ec27b091da5e4054000013681708/u@d (1688878916409753600), 7450/78a0ec27b091da5e4054000013681708/u@d (1688878916424433664), 7451/78a0ec27b091da5e4054000013681708/u@d (1688878916438065152), 7452/78a0ec27b091da5e4054000013681708/u@d (1688878916448550912)]} 0 30682</div><div class="">solr-mailcow_1 |<b class=""> 2021-01-14 16:09:40.277</b> INFO (qtp524223214-1325) [ x:dovecot-fts] o.a.s.u.p.LogUpdateProcessorFactory [dovecot-fts] webapp=/solr path=/update params={}{add=[7463/78a0ec27b091da5e4054000013681708/u@d (1688879057103486976)]} 0 1</div><div class="">solr-mailcow_1 | <b class="">2021-01-14 16:10:00.628</b> INFO (qtp524223214-1009) [ x:dovecot-fts] o.a.s.u.p.LogUpdateProcessorFactory [dovecot-fts] webapp=/solr path=/update params={}{add=[7453/78a0ec27b091da5e4054000013681708/u@d (1688878916486299648), 7454/78a0ec27b091da5e4054000013681708/u@d (1688878916489445376), 7455/78a0ec27b091da5e4054000013681708/u@d (1688878916496785408), 7456/78a0ec27b091da5e4054000013681708/u@d (1688878917584158720), 7457/78a0ec27b091da5e4054000013681708/u@d (1688878994974310400), 7458/78a0ec27b091da5e4054000013681708/u@d (1688879073177108480), 7459/78a0ec27b091da5e4054000013681708/u@d (1688879074234073088), 7460/78a0ec27b091da5e4054000013681708/u@d (1688879075288940544), 7461/78a0ec27b091da5e4054000013681708/u@d (1688879076339613696), 7462/78a0ec27b091da5e4054000013681708/u@d (1688879077392384000)]} 0 154455</div></blockquote><br class=""></div><div class="">This results in the following error on the console where I start reindexing: </div><div class=""><br class=""></div><div class=""><div class=""></div><blockquote type="cite" class=""><div class="">$ docker-compose exec dovecot-mailcow doveadm index -u u@d 'Sent'</div><div class="">doveadm(u@d): Error: fts_solr: Indexing failed: Request timed out (Request queued 134.122 secs ago, 1 send attempts in 134.098 secs, 131.923 in http ioloop, 0.000 in other ioloops, connected 376.408 secs ago)</div><div class="">doveadm(u@d): Error: Mailbox Sent: Mail search failed: Internal error occurred. Refer to server log for more information. [<b class="">2021-01-14 17:09:40</b>]</div><div class="">doveadm(u@d): Error: Mailbox Sent: Transaction commit failed: FTS transaction commit failed: backend deinit</div></blockquote></div><div class=""><br class=""></div><div class="">The last message about indexed block of ten messages (<b class="">2021-01-14 16:10:00.628 7453-7462)</b> arrives already after reindexing error on the other console occurs and doveadm exits. Interestingly, exactly at the time mentioned in the error message (<b class="">2021-01-14 17:09:40</b>, i.e. <b class="">16:06:40</b> - I don’t know why timezone differs) a message about indexing of a single message <b class="">7463</b> arrives (which is actually NEXT message to the block that gets indexed 20 seconds later). </div><div class=""><br class=""></div><div class="">The whole mailbox consists of 8530 messages and doveadm/solr can’t finish indexing it at all starting over and over.</div><div class=""><br class=""></div><div class="">Can you please help me understanding the reason of this behaviour?</div><div class=""><br class=""></div><div class="">P.S. Is there any possibility to determine what message in vmail maildir corresponds to solr log, e.g. to 7463/78a0ec27b091da5e4054000013681708/u@d (1688879057103486976) ? </div><div class=""><br class=""></div><div class="">Thanks, Programmierus</div></body></html>