MSO is not able to fetch some of the artifacts from SDC Distribution, mainly TOSCA artifacts.

Highlighting the key parts of ASDC Controller logs on MSO as follows :-

==> debugmso.log <==

2017-09-18T10:42:54.613Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|MSO-ASDC-5322E Artifact :vFortigateFW2 could not be downloaded correctly from ASDC URL f9cc645e-ec6d-4547-b38d-4f32718a2553 (UUID:1) Error message is {3})

2017-09-18T10:42:54.613Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|MSO-ASDC-5325I Sending DEPLOY (DEPLOY_ERROR) notification to ASDC for artifact:/sdc/v1/catalog/services/Testvfwservice2/1.0/resourceInstances/vfortigatefw20/artifacts/vfortigatefw20_modules.json

2017-09-18T10:42:54.613Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|DistributionClient - sendDeploymentStatus with errorReason

2017-09-18T10:42:54.613Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|DistributionClient - sendStatus

2017-09-18T10:42:54.717Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|sending 1 msgs to /events/SDC-DISTR-STATUS-TOPIC-AUTO. Oldest: 101 ms

2017-09-18T10:42:54.717Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|POST http://10.0.11.1:3904/events/SDC-DISTR-STATUS-TOPIC-AUTO will send credentials over a clear channel.

2017-09-18T10:42:54.717Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|POST http://10.0.11.1:3904/events/SDC-DISTR-STATUS-TOPIC-AUTO (as tk5uFjFnOBAnX5DH) ...

2017-09-18T10:42:54.722Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|  --> HTTP/1.1 200 OK

2017-09-18T10:42:54.722Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|cambria reply ok (5 ms):{"serverTimeMs":1,"count":1}

==> metricsmso.log <==

2017-09-18T10:42:52.765Z|2017-09-18T10:42:54.556Z|ba40d817-7e5b-4c11-833b-53c1b3fbd04d|36cbf1ed-b9b1-4280-9c03-343ebebafed9|pool-13-thread-8||NotificationHandler||CatalogDB|getToscaCsar|COMPLETE|0|Successfully. Tosca Csar not found|cd884795-54f2-432b-ac10-c8c9ea82f5ab|INFO|0|172.18.0.3|1791|mso.mso.testlab.openecomp.org||||||||||