Hi,

We've recently hit an issue with Asterisk 18.8.0 where a call comes in
via SIP (using pjsip) but it can take 5 seconds before starting to
execute the dialplan.

This was intermittent, but frequent (eg approx half of the calls).

We have verbose logging on, but I didn't see any errors.

Running asterisk -r -vvvv and then watching SIP traffic in another
window showed the INVITE coming in, then a good 5 seconds before
dialplan execution started showing within the Asterisk console.

We've never seen this before, but it affected 6 our of 8 of our
Asterisk servers. They're running in debian 11 VMS, with the VMs
running under KVM on the host OS which is also debian 11.

Any suggestions where to look next? We've been running Asterisk for
years but never seen this issue before.

FWIW, the match= lines for the SIP proxies sending to Asterisk are
configured by IPv4 address, not host name.

Cheers,
Kingsley.


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