Error on creating connection via http://localhost:8006/v1/connections api if destination is a custom connector

[abhijithcdreamorbit]

I am trying to create connection for two custom connectors using (http://localhost:8006/v1/connections)
But the api gives error saying (Submitted value could not be found: null)
{
"name": "test-connection",
"sourceId": "7fe9f226-b794-4b2e-801d-0021bfc8ac71",
"destinationId": "1d7c4aa8-4afd-473d-895a-aa925a53b90c",
"workspaceId": "7f1b5b55-a20a-4485-b8c9-a75b7ba6c749",
"status": "active",
"configurations": {
"streams": [
{
"name": "stream1",
"syncMode": "incremental_append",
"cursorField": [
"last_modified_date_time"
]
},
{
"name": "stream2",
"syncMode": "incremental_append",
"cursorField": [
"last_modified_date_time"
]
}
]
},
"schedule": {
"scheduleType": "manual"
},
"dataResidency": "auto",
"nonBreakingSchemaUpdatesBehavior": "ignore",
"namespaceDefinition": "destination",
"namespaceFormat": "${SOURCE_NAMESPACE}"
}

Additionally, I did try by giving an empty stream array and it worked. (Giving an impression that its failing to process streams config)
I also tried from UI. And was able to create a connection and sync. So no issues with how the connectors are built

Also this doesn't seem to work only when the destination is a custom connector. (As I tried with an inbuilt destination connector E2E Testing and that worked with same payload with E2E destinationId)

Looking at the code
https://github.com/airbytehq/airbyte-platform/blob/main/airbyte-api-server/src/main/kotlin/io/airbyte/api/server/services/DestinationService.kt#L285C7-L285C40
I see that It seems to fail while trying to fetch destinationDefinitionId from the mapper (Ideally it shouldn't be fetching from a mapper as its a custom connector)

[mn-mikke]

I have experienced the same problem.

[tinomerl]

just wanted to leave this here in case anyone else is still experiencing this: The fix for me was updating my airbyte instance.