Inconsistent response from REST API when hosted on WSO2 API Manager 2.1

Question

We have a REST API hosted on WSO2 API Manager. When calling the API through WSO2, it sometimes returns the correct response, other times gives an error that the json object received is invalid. The log file shows that the json request object is not being submitted to the API at all.

Can anyone help out on how to resolve or troubleshoot this issue?

Answer 1

I don't see any errors in the product log. The only difference I can see is the Activity Id is different in 2 requests, and it results in different responses.