Empty resource is getting published in Choreo analytics when invoking a GraphQL Subscription

[wasuradananjith]

Description:

An empty resource is getting published multiple times in Choreo analytics when invoking a GraphQL Subscription operation

Steps to reproduce:

1. Setup Choreo Analytics as mentioned in [1].
2. Create a GraphQL API [2].
3. Invoke a GraphQL Subscription [3]. (Refer to the below for a sample invocation screenshot)
   
4. The corresponding analytics data will be shown in the Choreo Analytics portal as shown below.
   
5. The marked record in the above screenshot contains an empty resource and an API method which is not meaningful at all.

Affected Product Version:

APIM 4.1.0-PreRC

[1] https://apim.docs.wso2.com/en/4.1.0/tutorials/scenarios/scenario7-analytics/#step-1-set-up-analytics
[2] https://apim.docs.wso2.com/en/4.1.0/design/create-api/create-a-graphql-api/
[3] https://apim.docs.wso2.com/en/4.1.0/consume/invoke-apis/invoke-apis-using-tools/invoke-an-graphql-api-using-the-integrated-graphql-console/#invoke-a-graphql-subscription-operation

[wasuradananjith]

I was able to identify a reason for the above issue.

I followed the below steps when further exporling.

• I created a new GraphQL API with Subscriptions
• Invoke it several times
• Then when I check the API Resource Usage Summary I was able to see the blank record that was added 15 times.
  
• Then I check the API Errors section and was able to identify the total number of failures was also 15.
  
• Hence, we can see that a blank record was added for each failure. Need to decide whether this is the expected behaviour and fix it if needed.