char hostname_port[NI_MAXHOST +NI_MAXSERV + sizeof("host : ")];
int size= snprintf(hostname_port, sizeof(hostname_port), "host: %s:%d", self.hostname, int(self.port));
memcached_string_t error_host= { hostname_port, size};
char hostname_port[NI_MAXHOST +NI_MAXSERV + sizeof("host : ")];
int size= snprintf(hostname_port, sizeof(hostname_port), "host: %s:%d", self.hostname, int(self.port));
memcached_string_t error_host= { hostname_port, size};