Dovecot+Solr+Tika segmentation fault

[Timo Sirainen]

On 4. Dec 2020, at 9.29, Manuel Josupeit-Walter <dj_delinquent at web.de> wrote:
> 
>>>> A fix was posted on this list which seems to avoid segfaults when
>>>> using solr+tika. I reposted it not long ago in response to another
>>>> question. Before exploring the other segfaults it would be worthwhile
>>>> getting that fix. If other segfaults continue then I suggest posting
>>>> the logging from Dovecot
>>> 
>>> https://github.com/dovecot/core/commit/043d111cea78533cf22d3bfe0872c8376d842f56[https://github.com/dovecot/core/commit/043d111cea78533cf22d3bfe0872c8376d842f56]
>>> (DOV-4090)
>>> 
>>> Scheduled for 2.3.13.
>> 
>> I applied the fix and will observe it for the next couple of days.
> 
> Unfortunately, the issue still persists even with this patch. The log
> message is slightly different, though, regarding disconnection:
> 
> Dec 03 17:10:49 server.name tika[988]: INFO  tika/ (application/pdf)
> Dec 03 17:10:49 server.name tika[988]: INFO  tika/ (image/png)
> Dec 03 17:10:49 server.name kernel: indexer-worker[15805]: segfault at 0 ip 00007f140483db64 sp 00007ffc04fa7960 error 4 in libdovecot.so.0.0.0[7f14047f3000+db000]
> Dec 03 17:10:49 server.name kernel: Code: 89 f5 48 8d b8 f0 01 00 00 48 8b 52 08 4c 8b 62 48 e8 90 89 fb ff 48 8b 44 24 08 be 00 20 00 00 4c 89 ef 48 8b 80 10 01 00 00 <4c> 8b 38 e8 64 b2 fb ff 48 8b 44 24 0
> Dec 03 17:10:49 server.name dovecot[988]: Dec 03 16:10:49 indexer: Error: Indexer worker disconnected, discarding 1 requests for username_stripped
> Dec 03 17:10:49 server.name dovecot[988]: Dec 03 16:10:49 indexer-worker(username_stripped)<1952><Ed3ek5G1BMQgARa4EL8DAKGMINRlZjjS:c+gACAkOyV+gBwAAhFs1yA>: Fatal: master: service(indexer-worker): child 1952 killed
> 
> It seems that there is something else going wrong in this version.

This is a segfault, while the fix was for an assert crash, so it's a different issue. Can you get a gdb backtrace of the crash? Otherwise we can't debug it further. See https://dovecot.org/bugreport-mail#coredumps