Murano engine stops at execution of io.murano.system.Agent.call

I am trying to launch a simple exisitng murano application written by mirantis, say telnet application.

All goes well until stack is launched and VM gets created, but the deployment hangs in there for ever when ever it is supposed to execute

 $.instance.agent.call($template, $resources)

When I check the logs, I could see engine log as shown below:

{"packages": [{"class_definitions": ["io.murano.apps.linux.Telnet"], "description": "Telnet is the traditional protocol for making remote console connections over TCP.\n", "tags": ["Linux", "connection"], "updated": "2015-01-23T12:38:25", "is_public": true, "categories": [], "name": "Telnet", "author": "Mirantis, Inc", "created": "2015-01-23T12:38:25", "enabled": true, "id": "136ba118cb9c4c959c1272de1619cf88", "supplier": {}, "fully_qualified_name": "io.murano.apps.linux.Telnet", "type": "Application", "owner_id": ""}]}
 log_http_response /opt/stack/python-muranoclient/muranoclient/common/http.py:124
2015-01-23 19:44:56.682 32107 DEBUG murano.dsl.executor [-] 3cff2baec5c442db872045e4a02c64cb: Begin execution: io.murano.system.Resources.yaml (3870724619994419412) called from File "/tmp/murano-packages-cache/d996b0d8-c790-4279-8828-f82b8875b5e6/io.murano/Classes/Environment.yaml", line 68:13 in method deploy of class io.murano.Environment
    $.applications.pselect($.deploy()) _invoke_method_implementation /opt/stack/murano/murano/dsl/executor.py:142
2015-01-23 19:44:56.718 32107 DEBUG murano.dsl.executor [-] 3cff2baec5c442db872045e4a02c64cb: End execution: io.murano.system.Resources.yaml (3870724619994419412) _invoke_method_implementation /opt/stack/murano/murano/dsl/executor.py:160
2015-01-23 19:44:56.719 32107 DEBUG murano.dsl.executor [-] 3cff2baec5c442db872045e4a02c64cb: Begin execution: io.murano.system.Agent.call (-6909955412123599548) called from File "/tmp/murano-packages-cache/d996b0d8-c790-4279-8828-f82b8875b5e6/io.murano/Classes/Environment.yaml", line 68:13 in method deploy of class io.murano.Environment
    $.applications.pselect($.deploy()) _invoke_method_implementation /opt/stack/murano/murano/dsl/executor.py:142

It is evident that murano system resources.yaml execution completes successfully, but io.murano.system.Agent.call begins execution and hangs there.

No other errors could be seen. Please help on whats going wrong.

Thank you.