The "429" error isn't a bug. It is the server stability measures kicking in. A 429 error is common on pretty much every server or website and provides prevention against DDoS attacks. This means that if you try to log into your realm too many times inside a certain time frame, the server sees all the requests sent from your machine and decides to not let any of them through. This is why you may be locked out but other users can join, since the server hasn't gotten loads of requests from their machines.
Let me reiterate: THE 429 ERROR IS NOT A BUG! It is the server's anti-DDoS system. If you get this error, it is best to leave it for 20-30 minutes and try again to let the request backlog refresh. No amount of reloading your game or restarting your system can bypass it (unless you manage to switch IPs).
There are some exceptions, though. If you are truly getting on the realm for the first time that day and you are immediately met with one of these errors, it is most likely a server-side issue, which you can contact Mojang about. But if you have been leaving and reentering your realm frequently, don't be surprised when this error pops up. If you are disconnecting as a means of vanilla-style pausing, like if you are following a tutorial in survival mode, it's best to just build a box around you so that you don't get a backlog of requests.
Nicholas Avery
The "429" error isn't a bug. It is the server stability measures kicking in. A 429 error is common on pretty much every server or website and provides prevention against DDoS attacks. This means that if you try to log into your realm too many times inside a certain time frame, the server sees all the requests sent from your machine and decides to not let any of them through. This is why you may be locked out but other users can join, since the server hasn't gotten loads of requests from their machines.
Let me reiterate: THE 429 ERROR IS NOT A BUG! It is the server's anti-DDoS system. If you get this error, it is best to leave it for 20-30 minutes and try again to let the request backlog refresh. No amount of reloading your game or restarting your system can bypass it (unless you manage to switch IPs).
There are some exceptions, though. If you are truly getting on the realm for the first time that day and you are immediately met with one of these errors, it is most likely a server-side issue, which you can contact Mojang about. But if you have been leaving and reentering your realm frequently, don't be surprised when this error pops up. If you are disconnecting as a means of vanilla-style pausing, like if you are following a tutorial in survival mode, it's best to just build a box around you so that you don't get a backlog of requests.
Hope this clarifies everything.