[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `dovecot/imap'.
Program terminated with signal 6, Aborted.
#0  0x00007f44637bb1f7 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56        return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);

On 09.05.2018 19:48, Federico Bartolucci wrote:

Hello,

when doing a simple search through the lucene indexes in some mailboxes (with actually many subfolders) the search terminates after a few seconds with no result and the dovecot log shows this error:

Fatal: master: service(imap): child 15433 killed with signal 6 (core not dumped)


Any clue about the reasons? the lucene indexes have been already rebuilt and look OK.

Probably worth gathering more info by getting a full backtrace as per instructions in:

https://www.dovecot.org/bugreport.html

Good luck,
Reio