[server] Better logging on shutdown from failed getpeername (#35611)

Regardless of whether we change server behavior to continue running after a failed `getpeername` on accept, this improves the logs for the current server behavior.

Related to #35076

Closes #35611

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/35611 from drfloob:louder-server-stoppage-on-bad-getpeername 2d1e69aff0
PiperOrigin-RevId: 599886474

src/core/lib/event_engine/posix_engine/posix_engine_listener.cc

@@ -186,8 +186,14 @@ void PosixEngineListenerImpl::AsyncConnectionAcceptor::NotifyOnAccept(
     if (addr.address()->sa_family == AF_UNIX) {
       socklen_t len = EventEngine::ResolvedAddress::MAX_SIZE_BYTES;
       if (getpeername(fd, const_cast<sockaddr*>(addr.address()), &len) < 0) {
-        gpr_log(GPR_ERROR, "Closing acceptor. Failed getpeername: %s",
-                strerror(errno));
+        auto listener_addr_uri = ResolvedAddressToURI(socket_.addr);
+        gpr_log(
+            GPR_ERROR,
+            "Failed getpeername: %s. This is a critical failure, the "
+            "listener on %s:%d is shutting down.",
+            strerror(errno),
+            listener_addr_uri.ok() ? listener_addr_uri->c_str() : "<unknown>",
+            socket_.port);
         close(fd);
         // Shutting down the acceptor. Unref the ref grabbed in
         // AsyncConnectionAcceptor::Start().

src/core/lib/iomgr/tcp_server_posix.cc

@@ -420,8 +420,14 @@ static void on_read(void* arg, grpc_error_handle err) {
       addr.len = static_cast<socklen_t>(sizeof(struct sockaddr_storage));
       if (getpeername(fd, reinterpret_cast<struct sockaddr*>(addr.addr),
                       &(addr.len)) < 0) {
-        gpr_log(GPR_ERROR, "Failed getpeername: %s",
-                grpc_core::StrError(errno).c_str());
+        auto listener_addr_uri = grpc_sockaddr_to_uri(&sp->addr);
+        gpr_log(
+            GPR_ERROR,
+            "Failed getpeername: %s. This is a critical failure, the "
+            "listener on %s:%d is shutting down.",
+            grpc_core::StrError(errno).c_str(),
+            listener_addr_uri.ok() ? listener_addr_uri->c_str() : "<unknown>",
+            sp->port);
         close(fd);
         goto error;
       }