socket: improve error message when we cannot spawn the socket's service unit

diff --git a/src/core/socket.c b/src/core/socket.c
index c0959815c174c89d34cd56082286a4a4507a403d..f4f40afa907f39e734993e519d5325b9713eac4d 100644 (file)
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -1542,7 +1542,7 @@ static void socket_enter_running(Socket *s, int cfd) {
         return;
 
 fail:
-        log_warning("%s failed to queue socket startup job: %s", UNIT(s)->id, bus_error(&error, r));
+        log_warning("%s failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", UNIT(s)->id, cfd >= 0 ? "template" : "non-template", bus_error(&error, r));
         socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES);
 
         if (cfd >= 0)