The Zend_Queue_Stomp_Client_Connection accepts an options array as 4th parameter for the open method. This options array is not used by the stomp client. This cause a problem with the timeout setting for Activemq adapter(and probably all other stomp related adapters). The timeout option is never set, so the const READ_TIMEOUT_DEFAULT_SEC is always used by the connection.

From Zend_Queue_Stomp_Client_Connection public function open($scheme, $host, $port, array $options = array())

Invoked as follows $connection->open($scheme, $host, $port)