Retry-After header is not available for burst control throttled responses [APIM 4.0.0]

[Sumudu-Sahan]

Description

Retry-After header is not available for burst control throttled responses. But the same header will appear if the throttling is happening at the subscription throttling level.

Steps to Reproduce

• Start the APIM pack and go to the admin portal.
• Create 2 new subscription policies (BURSTPOLICY, SUBPOLICY) with below values.

BURSTPOLICY
- Subscription Rate Limit: 10000 requests per 1 minute.
- Burst Rate Limit: 1 request per 1 minute.

SUBPOLICY
- Subscription Rate Limit: 1 request per 1 minute.
- Burst Rate Limit: not configured

• Go to the publisher portal and create an API.
• Under the Subscriptions section, enable both subscription policies.
• Go to the devportal and do 2 tests under the below scenarios.

Subscription Level Throttling

• Subscribe to the API with an application by using the SUBPOLICY.
• Invoke the API until it gets throttled out.
• Check the response headers and able to notice that the Retry-After header is there as below.

Burst Control Level Throttling

• Subscribe to the API with an application by using the BURSTPOLICY.
• Invoke the API until it got throttled out.
• Check the response headers and able to notice that the Retry-After header is not there as below.

Affected Component

APIM

Version

4.0.0

Environment Details (with versions)

No response

Relevant Log Output

No response

Related Issues

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Suggested Labels

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