amavisd-new crashes on FreeBSD 11

[Patrick Proniewski]

Hello,

I've just upgraded a mail gateway from FreeBSD 10.x to FreeBSD 11.x, and reinstalled every pkg/ports. Everything worked fine on 10.x but now I'm experiencing crashes from Amavisd-new children:

Apr 18 13:03:08 hostname amavis[77030]: (!!)TROUBLE in child_init_hook: BDB can't connect db env. at /var/amavis/db: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery, No such file or directory. at (eval 93) line 338.
Apr 18 13:03:08 hostname amavis[77030]: (!)_DIE: Suicide in child_init_hook: BDB can't connect db env. at /var/amavis/db: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery, No such file or directory. at (eval 93) line 338.

When it happens I have to stop amavisd, kill remaining children, remote content of /var/amavis/db, start amavisd. It's a very high traffic server (with mailing lists too), so I'll probably have to keep the setting "$enable_db = 1;"

Other users are facing the same problem:
https://forum.iredmail.org/topic12321-iredmail-support-amavisd-crashes-almost-daily-on-freebsd-11.html
https://forum.iredmail.org/topic12034-iredmail-support-amavisd-suicide-in-childinithook-bdb-cant-connect-db-env-at-var.html

Any idea how to solve this (urgent) problem?

Thanks,

Patrick

-- 
related pkg installed:

db48-4.8.30.0_2
db5-5.3.28_6
amavisd-new-2.11.0_2,1
clamav-0.100.0_1
spamassassin-3.4.1_11
perl5-5.26.1
p5-BerkeleyDB-0.55_1