added Concurrent Active Scan Limit



The information contained in this changelog has been superseded. Refer to Concurrent Active Scan and Scan Processing Limit for the most recent information about concurrent active scan limits.

Tenable applies rate limiting and concurrency limiting to the API to ensure that all customers experience the same level of service. A new concurrency limit has been added for active scans. You can have a maximum of 400 active scans per container.

An HTTP response message with a 429 (Too Many Requests) status code is returned if you attempt to launch more than 400 scans. The response also includes a retry-after header element that specifies the number of seconds to wait before retrying. For more information, see Concurrency Limiting and Rate Limiting.

This update applies to the following endpoints:

POST /scans/{scan_id}/launchA limit of 400 active scans per container has been added.



To get the count of active scans in your container, use the Get scan count endpoint with the query parameter active set to true.