Tried to add an external SDN controller in ESR, and this error is raised in SDNC karaf log file. As a result of this, SDNC doesn't trigger the topology disovery.

2018-12-05T13:25:16,225 | INFO  | qtp1870976428-19032 | DataChangeProvider               | 231 - org.onap.ccsdk.sli.northbound.dataChange-provider - 0.3.2 |  -  | Adding INPUT data for data-change-notification input: DataChangeNotificationInput{getAaiEventId=60a6c279-ee4d-4824-9cd0-22e19333407a, getAaiEventTrigger=Update, getAaiNodeType=esr-thirdparty-sdnc, getKeyData=[KeyData\{getKeyName=thirdparty-sdnc-id, getKeyValue=7e8936f8-cc09-4759-97a9-9c0959d841e2, augmentations={}}, KeyData\{getKeyName=password, getKeyValue=, augmentations={}}, KeyData\{getKeyName=product-name, getKeyValue=Swisscom edge ctl, augmentations={}}, KeyData\{getKeyName=user-name, getKeyValue=admin, augmentations={}}, KeyData\{getKeyName=default-tenant, getKeyValue=$defaulttenant, augmentations={}}, KeyData\{getKeyName=system-name, getKeyValue=edge-ctl, augmentations={}}, KeyData\{getKeyName=port, getKeyValue=$port, augmentations={}}, KeyData\{getKeyName=protocol, getKeyValue=netconf, augmentations={}}, KeyData\{getKeyName=system-type, getKeyValue=thirdparty_SDNC, augmentations={}}, KeyData\{getKeyName=service-url, getKeyValue=http://172.20.0.131:5000, augmentations={}}, KeyData\{getKeyName=remote-path, getKeyValue=$remotepath, augmentations={}}, KeyData\{getKeyName=passive, getKeyValue=$passive, augmentations={}}, KeyData\{getKeyName=location, getKeyValue=edge, augmentations={}}, KeyData\{getKeyName=type, getKeyValue=WAN, augmentations={}}, KeyData\{getKeyName=resource-version, getKeyValue=1544013551594, augmentations={}}, KeyData\{getKeyName=vendor, getKeyValue=Swisscom, augmentations={}}, KeyData\{getKeyName=ssl-insecure, getKeyValue=$sslinsecure, augmentations={}}, KeyData\{getKeyName=system-status, getKeyValue=$systemstatus, augmentations={}}, KeyData\{getKeyName=version, getKeyValue=v1.0, augmentations={}}, KeyData\{getKeyName=esr-system-info-id, getKeyValue=fcbf300d-6c18-47b3-a734-86e1d7d30f08, augmentations={}}, KeyData\{getKeyName=ssl-cacert, getKeyValue=$sslcacert, augmentations={}}, KeyData\{getKeyName=ip-address, getKeyValue=$ipaddress, augmentations={}}, KeyData\{getKeyName=cloud-domain, getKeyValue=$clouddomain, augmentations={}}], getSelflink=/aai/v14/external-system/esr-thirdparty-sdnc-list/esr-thirdparty-sdnc/7e8936f8-cc09-4759-97a9-9c0959d841e2, augmentations={}}

2018-12-05T13:25:16,233 | ERROR | qtp1870976428-19032 | DataChangeProvider               | 231 - org.onap.ccsdk.sli.northbound.dataChange-provider - 0.3.2 |  -  | No service logic active for DataChange: 'data-change-notification'

2018-12-05T13:25:16,233 | ERROR | qtp1870976428-19032 | DataChangeProvider               | 231 - org.onap.ccsdk.sli.northbound.dataChange-provider - 0.3.2 |  -  | Returned FAILED for data-change-notification error code: '503'

opendaylight-user@root>list | grep -i data
35 | Active | 80 | 2.8.9 | jackson-databind
36 | Active | 80 | 2.8.9 | Jackson-dataformat-XML
37 | Active | 80 | 2.8.9 | Jackson-datatype-json.org
201 | Active | 80 | 1.4.196 | H2 Database Engine
209 | Active | 80 | 0.3.2 | blueprints-data-adaptor-provider
230 | Active | 80 | 0.3.2 | ccsdk-sli-northbound :: dataChange :: dataChange-model
231 | Active | 80 | 0.3.2 | ccsdk-sli-northbound :: dataChange :: dataChange-provider