Intermittent 502 Bad Gateway error when proxy is peak load test script is running

[yuanahe]

We have proxies configured on Apigee Edge Cloud. Proxies work when load script is not running. The peak load script has been running fine on the same proxies until around 12/3-12/4. We encounter intermittent 502 Bad Gateway errors with the following error message:

An error occurred.

Sorry, the page you are looking for is currently unavailable.
Please try again later.

Nothing shows up in trace. We already turned off logging temporarily, but the 502s are still occurring.

[dchiesa1]

Can you please contact Apigee Support, they'll be able to scan your logs and help diagnose the problem with you.