VPN-1 crashing and shutting down tunnels

[danzaka]

Hello .

I have some weird problem in my fw .
This problem accures once a week or so .

The firewall start to "close" tunnels , all of the sudden some tunnels goes down.
In the log it shows the packets leaving the firewall encrypted and etc ... but nothing is coming on the other side .

When this happen i trying to do cpstop cpstart and etc ... this dosent solve anything .... but rebooting fixing the problem ..

I check the splat log and i see those error messages in the log ;
"kernel: FW-1: fwconn_chain_get_something: fwconn_chain_lookup failed (5)"
"Kernel: VPN-1 Log buffer is full "
"Kernel: VPN-1 lost 28 log/trap messages "
"Kernel: VPN-1 log buffer is full "

Did anyone encunter such a problem and have an idea where to start checking ?

[dsb.nepo]

Please let us know the FW Version and alredy applied Hotfixes (the magic glass ball is out of the forum).
How many tunnels do you have, is the failure during vpn peek ...