[Freeswitch-users] Reliability of HEARTBEAT events every 20 seconds? (in mod_event_socket)

[Peter Olsson]

Hello everyone,

I have a question about the reliability of heartbeat events, it should be sent from FreeSWITCH every 20 seconds - right? If you look below in my log sample (from my own process), you can see that it comes 12:07:01, then 21, then 41, but after this it suddenly takes 31 seconds for it to show up (12:08:12). I've also done a Wireshark trace, and it shows the same thing - so it is really delayed from FS. The load at the time was zero calls, and the server itself was using maybe 5% CPU. After the delayed event it continues to show up every 20 seconds.

[2010-12-09 12:07:01] Received HEARTBEAT event - we're alive.
[2010-12-09 12:07:21] Received HEARTBEAT event - we're alive.
[2010-12-09 12:07:41] Received HEARTBEAT event - we're alive.
[2010-12-09 12:08:12] Received HEARTBEAT event - we're alive.
[2010-12-09 12:08:32] Received HEARTBEAT event - we're alive.
[2010-12-09 12:08:52] Received HEARTBEAT event - we're alive.
[2010-12-09 12:09:12] Received HEARTBEAT event - we're alive.

Should the HEARTBEAT event be 100% reliable, or could something cause a delay like this? This server is not on latest GIT, but it's not more then one month old. I can debug this further myself, but I just want to know if it always should be triggered every 20 seconds, or if these events for some reasons might be delayed.

By the way - no clock skew or anything is detected on the machine, so that's not causing it.

Thanks,

Peter
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