--- /dev/null
+--- httpd-2.4.4.org/server/mpm_unix.c 2012-07-03 21:38:58.000000000 +0200
++++ httpd-2.4.4/server/mpm_unix.c 2013-04-15 14:27:54.197655418 +0200
+@@ -604,7 +604,17 @@
+ len = strlen(data);
+ }
+
+- apr_socket_send(sock, data, &len);
++ rv = apr_socket_send(sock, data, &len);
++ if (rv == APR_SUCCESS && lp->protocol && strcasecmp(lp->protocol, "http") == 0) {
++ char *buffer[10]; // dummy buffer to see if child is alive
++
++ len = sizeof(buffer);
++ rv = apr_socket_recv(sock, buffer, &len);
++ if (rv != APR_SUCCESS) {
++ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, ap_server_conf,
++ "receiving response to dummy data to listener on %pI", lp->bind_addr);
++ }
++ }
+ apr_socket_close(sock);
+ apr_pool_destroy(p);
+