Deployment API throws ConnectException

Deployment API throws ConnectException

1. Send deployment request with correct resource.

{
"merchantUuid": "6b9b55bd-6472-4bf9-9a8b-a1161c201ed1",
"primaryDestinationUrl": "http://www.example.com",

"campaignList": [

{ "baId": 10001, "locationId": 1, "distribution": "GOOGLE" }

],
"distributionBudgets": [

{ "monthlyBudget": 52, "distribution": "GOOGLE" }

]
}

2. Observe the response

Actual result:

It shows connection refused -
java.net.ConnectException: ConnectException invoking http://qa2.aq-qa2-front1:8833/taxonomyapi/taxonomy/business/10001: Connection refused

Screenshot attached.