Show channels: deadlock

I’ve updated my * from 1.0.9 to 1.2.6 (pwlib 1.9.2, openh323 1.17.3).
And here is a problem appeared.
After a few hours of * work by show channels command i have:

asterisk*CLI> show channels Channel Location State Application(Data) 0 active channels 3 active calls Apr 6 10:57:04 WARNING[27926]: channel.c:787 channel_find_locked: Avoided deadlock for '0x833d788', 10 retries!

I’d try to update pwlib to 1.10.0 and openh323 to 1.18.0 but the same problem still.
What can be wrong?
thanx ahead.

Can somebody answer my question please?