I tried to distribute multiple different services from SDC. SDNC was able to download each service but ran into the same Error exception for all of them.  To help you locate the problem I created a simple service that only includes a generic neutron network. Please see the error log and the the yaml file being distributed to SDNC below.

Error log

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INFO 2017-11-01 02:15:35.265 +0000 SdncUebCallback - Process TOSCA YAML file: /opt/onap/sdnc/ueb-listener/spool/incoming/testsimplenetkang1031/service-TestSimpleNetKang1031-template.yml
DEBUG 2017-11-01 02:15:35.265 +0000 ToscaTemplate - ToscaTemplate Loading YAMEL file /opt/onap/sdnc/ueb-listener/spool/incoming/testsimplenetkang1031/service-TestSimpleNetKang1031-template.yml
ERROR 2017-11-01 02:15:35.271 +0000 NotificationConsumer - Error exception occured when fetching with Cambria Client:null
DEBUG 2017-11-01 02:15:35.271 +0000 NotificationConsumer - Error exception occured when fetching with Cambria Client:null
java.lang.NullPointerException
at org.openecomp.sdc.toscaparser.api.ToscaTemplate.getMetaProperties(ToscaTemplate.java:596)
at org.openecomp.sdc.tosca.parser.impl.SdcCsarHelperImpl.getConformanceLevel(SdcCsarHelperImpl.java:574)
at org.openecomp.sdc.tosca.parser.impl.SdcToscaParserFactory.init(SdcToscaParserFactory.java:71)
at org.openecomp.sdc.tosca.parser.impl.SdcToscaParserFactory.getSdcCsarHelper(SdcToscaParserFactory.java:47)
at org.onap.ccsdk.sli.northbound.uebclient.SdncUebCallback.processToscaYaml(SdncUebCallback.java:545)
at org.onap.ccsdk.sli.northbound.uebclient.SdncUebCallback.handleSuccessfulDownload(SdncUebCallback.java:466)
at org.onap.ccsdk.sli.northbound.uebclient.SdncUebCallback.handleArtifact(SdncUebCallback.java:416)
at org.onap.ccsdk.sli.northbound.uebclient.SdncUebCallback.activateCallback(SdncUebCallback.java:268)
at org.openecomp.sdc.impl.NotificationConsumer.run(NotificationConsumer.java:71)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

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YAML file: /opt/onap/sdnc/ueb-listener/spool/incoming/testsimplenetkang1031/service-TestSimpleNetKang1031-template.yml

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tosca_definitions_version: tosca_simple_yaml_1_1
metadata:
invariantUUID: be4d56af-04a7-4dd5-97f9-d931a8f08c06
UUID: ef13f24b-7d56-48cb-baad-4ffe20699cf9
name: test-simple-net-kang-1031
description: Simple neutron network to test distribution to SDNC
type: Service
category: Network L1-3
serviceType: ''
serviceRole: ''
serviceEcompNaming: true
ecompGeneratedNaming: true
namingPolicy: ''
imports:

• nodes:
  file: nodes.yml
• datatypes:
  file: data.yml
• capabilities:
  file: capabilities.yml
• relationships:
  file: relationships.yml
• groups:
  file: groups.yml
• policies:
  file: policies.yml
• service-test-simple-net-kang-1031-interface:
  file: service-TestSimpleNetKang1031-template-interface.yml
• resource-Generic NeutronNet:
  file: resource-GenericNeutronnet-template.yml
  topology_template:
  node_templates:
  simple_neutron_network:
  type: org.openecomp.resource.vl.GenericNeutronNet
  metadata:
  invariantUUID: f43c5d26-e409-473f-b76e-94ac364916f9
  UUID: 698402d7-b5d4-4bae-8099-b5cfb3ebe67a
  customizationUUID: e155b087-627e-4151-a911-90046b035ebd
  version: '29.0'
  name: Generic NeutronNet
  description: Generic NeutronNet
  type: VL
  category: Generic
  subcategory: Network Elements
  resourceVendor: ATT (Tosca)
  resourceVendorRelease: 1.0.0.wd03
  resourceVendorModelNumber: ''
  properties:
  network_role: TestSimpleNetKang1031.simple-net
  network_assignments:
  is_external_network: false
  ipv4_subnet_default_assignment:
  min_subnets_count: 1
  ecomp_generated_network_assignment: false
  ipv6_subnet_default_assignment:
  min_subnets_count: 1
  exVL_naming:
  ecomp_generated_naming: true
  network_flows:
  is_network_policy: false
  is_bound_to_vpn: false
  network_ecomp_naming:
  ecomp_generated_naming: true
  network_type: NEUTRON
  network_technology: NEUTRON
  network_homing:
  ecomp_selected_instance_node_target: false
  substitution_mappings:
  node_type: org.openecomp.service.TestSimpleNetKang1031
  capabilities:
  genericneutronnet0.feature:
• Generic NeutronNet 0
• feature
  genericneutronnet0.virtual_linkable:
• Generic NeutronNet 0
• virtual_linkable
  requirements:
  genericneutronnet0.dependency:
• Generic NeutronNet 0
• dependency