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Getting 'Request too long' when hitting the MDI portal
Over the last week, more and more of our support teams have been seeing "Bad Request - Request Too Long. HTTP Error 400: The size of the request headers is too long" messages when hitting https://ourATP.atp.azure.com/timeline
Anyone else seeing this ?
Clearing cache, inprivate, different browsers, different users....none seem to fix it. Then all of a sudden it will just work. I am assuming backend issues...but curious
- Known issue, engineering are working on a hotfix.
Once fixed, you should delete the local cookies, try again and it should work.
You can track status here:
https://health.atp.azure.com/incidents/tmcrvr4pkbbd
4 Replies
- My workaround is to launch it using an InPrivate window.
- Joakim Hagström
Microsoft
Another potential cause for this behavior is having a large amount of AAD group memberships resulting in a very long access token, as discovered by Per Stromberg . So if there is no service outage and all browser caches have been cleared and the issue still persists, that is a good area to turn your attention to next.
- EliOfekKnown issue, engineering are working on a hotfix.
Once fixed, you should delete the local cookies, try again and it should work.
You can track status here:
https://health.atp.azure.com/incidents/tmcrvr4pkbbd- Thanks for the super quick acknowledgement. Wish all MS product teams supported their products in such an open, fast and consistent way. Thanks Eli
