`Unable to login: java.io.IOException with a 503` Error Type


This guide will help you solve the `Unable to login: java.io.IOException with a 503` error type.

||| Note that we have a guide [here](https://help.ggservers.com/en-us/article/troubleshooting-minecraft-server-errors-8z6t65/) for troubleshooting Minecraft errors which is explaining about this error too!

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# ❓ What Is this Error ❓

If you have received a `java.io.IOException` with a `503` error, this means the **Minecraft session servers are down**.

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# How to Fix

**Sometimes this is a glitch that can be fixed by:**

* Closing your game.

* Logging out of your launcher.

* Restarting the server.

* Restarting your launcher, logging back into Mojang, and trying to connect again.

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If this doesn’t work, the session servers are down, and you’ll be unable to join any server with **online mode** enabled.

Most servers have **online mode** enabled for security. If you desperately need to get on your server, you can enable the offline mode.

||| [Here](https://help.ggservers.com/en-us/article/how-to-enable-the-offline-mode-in-your-server-1l5bcz6/) is our guide explaining the offline mode and how to enable it.

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| If you find any issues with this error type, we ask you to contact us via live chat or the ticket system [here](https://ggservers.com/billing/submitticket.php).

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# ❕ Useful Links ❕

– [How to Use the JSON Validator (JSON Error Type)](https://help.ggservers.com/en-us/article/how-to-use-the-json-validator-json-error-type-12ugkgp/)
– [Connection refused: no further information](https://help.ggservers.com/en-us/article/connection-refused-no-further-information-anka7e/)
– [Connection Timed Out – An Existing Connection Was Forcibly Closed by the Remote Host.](https://help.ggservers.com/en-us/article/connection-timed-out-an-existing-connection-was-forcibly-closed-by-the-remote-host-582awl/)