diff --git a/core/master_utils.c b/core/master_utils.c
index bf5cba66..b3ff2025 100644
--- a/core/master_utils.c
+++ b/core/master_utils.c
@@ -77,7 +77,7 @@ void uwsgi_master_cleanup_hooks(void) {
 	int j;
 
 	// could be an inherited atexit hook
-	if (uwsgi.mywid > 0)
+	if (uwsgi.mypid != uwsgi.workers[0].pid)
 		return;
 
 	uwsgi.status.is_cleaning = 1;
diff --git a/core/rpc.c b/core/rpc.c
index 15a129bb..897d13d7 100644
--- a/core/rpc.c
+++ b/core/rpc.c
@@ -22,11 +22,27 @@ int uwsgi_register_rpc(char *name, uint8_t modifier1, uint8_t args, void *func)
 		urpc->modifier1 = modifier1;
 		urpc->args = args;
 		urpc->func = func;
+		urpc->shared = uwsgi.mywid == 0 ? 1 : 0;
 
 		uwsgi.shared->rpc_count[uwsgi.mywid]++;
 
 		ret = 0;
-		uwsgi_log("registered RPC function %s\n", name);
+		if (uwsgi.mywid == 0) {
+			uwsgi_log("registered shared/inherited RPC function \"%s\"\n", name);
+		}
+		else {
+			uwsgi_log("registered RPC function \"%s\" on worker %d\n", name, uwsgi.mywid);
+		}
+	}
+
+	// implement cow
+	if (uwsgi.mywid == 0) {
+		int i;
+		for(i=1;i<=uwsgi.numproc;i++) {
+			uwsgi.shared->rpc_count[i] = uwsgi.shared->rpc_count[0];
+			int pos = (i * uwsgi.rpc_max);
+			memcpy(&uwsgi.rpc_table[pos], uwsgi.rpc_table, sizeof(struct uwsgi_rpc) * uwsgi.rpc_max);
+		}
 	}
 
 	uwsgi_unlock(uwsgi.rpc_table_lock);
diff --git a/plugins/carbon/carbon.c b/plugins/carbon/carbon.c
index 5817bc18..c1841889 100644
--- a/plugins/carbon/carbon.c
+++ b/plugins/carbon/carbon.c
@@ -141,6 +141,7 @@ static int carbon_write(int fd, char *fmt,...) {
 
 static void carbon_push_stats(int retry_cycle, time_t now) {
 	struct carbon_server_list *usl = u_carbon.servers_data;
+	if (!u_carbon.servers_data) return;
 	int i;
 	int fd;
 	int wok;
diff --git a/uwsgi.h b/uwsgi.h
index 87193e9b..21511b5d 100644
--- a/uwsgi.h
+++ b/uwsgi.h
@@ -2244,6 +2244,7 @@ struct uwsgi_rpc {
 	void *func;
 	uint8_t args;
 	uint8_t modifier1;
+	uint8_t shared;
 };
 
 	struct uwsgi_signal_entry {