I’m seeing all the inbound TCP connections to my app (on kubernetes) being terminated every 30 minutes or so since we upgraded istio from 1.1 to 1.3.
Both the downstream client and my app (the upstream server) see it as the remote initiating the connection closure. Upon looking at the TCP packet capture, it seems that the proxy is sending FIN to both the downstream and the upstream.
I don’t understand what might be triggering it. All I have from istio are the access logs.