FAQ - How can I investigate 5xx errors?

If you’ve detected, or been notified that requests to your site are resulting in an error you can utilize the Traffic Analytics dashboard when investigating.

Note: Always adjust the Dashboard Date – Time range depending on the timeframe you are investigating. By default the dashboard will always show the "last 1 hour".

From the Analytics Dashboard:

1. Locate the Response Codes category filter  

2. Filter the 500 errors by clicking on 5xx:


You should now see all 5xx errors that were generated.



 Common 5xx Server Errors

Below is a list of 5xx errors that you can see within the Yottaa portal. These errors are response codes generated by Yottaa and will display a Yottaa error page.


500 Internal Server Error:

Catch all error that reports unexpected conditions that prevented the request to be fulfilled.

503 Service Unavailable (Application Timeout):

Occurs when the server is unable to handle the current request. This can be due to scheduled maintenance or temporary overload.

504 Gateway Time-out:

Yottaa server was unable to receive a timely response from origin. This results in a network timeout.


Below is a list of other common 5xx errors that you may encounter. It is important to note that these errors will not generate a Yottaa error page, and will be handled client side, or logged via origin logs.


501 Not Implemented:

Occurs when the server does not recognize the request, or is unable to fulfill the request.

502 Bad Gateway:

The server is acting as a gateway or proxy, and received an invalid response from the inbound server while attempting to fulfill a request.

508 Loop Detected:

The server detected an infinite loop while processing the request


3. Use the graph to identify 5xx occurrences:

                  When did this occur?

                  Is this still an active concern?



4. Identify the impact of these response codes:

                  Who is affected?

                  Is it isolated?

5. Identify the URLs that are requested that result in the error:

                  What is affected?

                  What is calling the affected URL?

6. Identify the source of the error using the “Served From” Category filter:

                  Where is the response code served?

Note: Match up, or filter, by either Yottaa or the origin to get a view of what content is responded with an error from each environment.

7. Diagnosing these types of issues may take a collaborative effort involving Yottaa support. However investigating logs on the origin server may give the best results of what response is sent to Yottaa during the time of incident.

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