Thanks for your inputs. I will look further at Istio side if anything can be done to achieve this
On Tuesday, September 30, 2025 at 3:09:52 AM UTC+5:30 Eric Anderson wrote: > On Mon, Sep 29, 2025 at 8:23 AM Prathish Elango <[email protected]> > wrote: > >> I'm analysing on using grpc keep alive to detect dangling connections >> between my client and server like hardware failure or something similar >> which brings down the server and the connection doesn't get closed. > > > If you're concerned about the machine getting wedged, then you'd want > keepalive between the proxy sidecars. If you are concerned with the process > getting wedged, then you'd want it between the client and proxy, and proxy > and server. (For the client to monitor its sidecar, and for the sidecar to > monitor the server.) > > client → sidecar → sidecar → server > > Each → could have its own keepalive driven by the client-side/left-side of > the connection. You're already doing client→sidecar. > > This is helping me in case I don't use a proxy in between my services. And >> as you said istio side car is responding to h2 pings from my clients, I >> modified ip tables of my server to simulate a blackhole kind of scenario >> and my client was still sending those h2 pings and getting back ack for it >> >> Do you have a suggestion on what I can do to make sure my client detects >> these kinds of broken servers? Right now all the calls are unary between >> them > > > I see Istio has a setting for TcpKeepalive > <https://github.com/grpc/grpc-java/pull/12203>. TCP keepalive is relevant > between the two sidecars. It isn't useful between the sidecar and server. > But that might be what you want to detect machines breaking. Your question > is really an Istio question, and I haven't actually used Istio. > -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/grpc-io/6982300f-d011-43d1-950b-79783e07bb3cn%40googlegroups.com.
