Our current switch is being overloaded and when it does we're getting these 2 messages spammed in our logs:

WARNING: dialog [dlg_handlers.c:1127]: dlg_onroute(): unable to find dialog for ACK with route param '35d.d2f1' [3411:7981]

ERROR: tm [t_reply.c:1341]: t_should_relay_response(): ERROR: t_should_relay_response: status rewrite by UAS: stored: 503, received: 100

We're obviously working on not having the switch get so overloaded, but I'm also curious to understand why it can't find the dialogs. Is it a memory issue? Networking/dropping packets issue?

I also imagine it's not as simple as a single overall answer either, but nevertheless I figured I'd reach out to the community and see if anyone has an understanding of what is happening and would be willing to take a few mins to explain.

Thanks in advance,