Strange cyrus behaviour

[Semenenko Pavel]

I have cyrus server on 2.6.18-gentoo-r6.
When I try restart cyrus (from console), I get this messages in log.

master[2712]: process 3073 exited, signaled to death by 13
master[2712]: service pop3 pid 3073 in READY state: terminated abnormally
master[2712]: process 3074 exited, signaled to death by 13
master[2712]: service lmtpunix pid 3074 in READY state: terminated abnormally
master[2712]: process 3075 exited, signaled to death by 13
master[2712]: service imap pid 3075 in READY state: terminated abnormally

None of cyrus services starting.
In ps aufx I have something about it:
cyrusmaster
|
 -<defunct>
 -<defunct>
 -<defunct>

I'll tried to find something, but all what I find combined with db upgrade and DBERROR word is in log. I didn't upgrade db, and db4.2_recover (I have tried this) can't help...
If I rebooting server, then cyrus starting normally.

How to fix this?