I just found this in dmesg:
fail2ban-server[1907]: segfault at 5c ip 00007fd7c9a6e764 sp 00007fd7c920e7b0 error 4 in libsqlite3.so.0.8.6[7fd7c9a52000+bf000]
Linux 3.19RC2 x86_64
Kubuntu 14.10
fail2ban: 0.9.1
Please ask for any additional info. Thanks.
Here is fail2ban logfile.
It is a known issue and unfortunately I don't know the answer yet :-/
"official" report is here: https://github.com/fail2ban/fail2ban/issues/844
There is a hope that current master might somehow workarounding this issue but we haven't released it yet, neither I have tried to confirm that
continue discussion/digging on github issue page please
Ok, thanks for info.