What Different Join Errors Mean When Joining a Minecraft Server

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In this article, we list the most common errors players face when trying to join a Minecraft server and explain what causes them.

Timed Out

This error occurs when the user attempts to connect to the server but does not receive a response after a certain period of time. This is due to the connection being too slow or the server being overloaded.

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Connection Timed Out: Getsockopt

This error is a more specific variation of the ‘Timed Out’ error, indicating a client-side issue, such as a firewall or antivirus blocking Minecraft’s incoming/outgoing connection to the server’s port, which prevents the connection from being established correctly.

If you want to know how to fix this error, you can view our How to Fix the Getsockopt Error in Minecraft article.

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Failed to Verify Username

This error occurs when the client cannot communicate with the authentication servers (Mojang/Microsoft network), which is necessary to confirm the Minecraft account is genuine and licensed.

This error is very common when the user is using a pirated version of Minecraft on a server that requires a premium account.

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Java.netSocketException

This error indicates that the Java program encountered a problem (generally caused by various network issues) while reading/writing data to the network socket. This means the connection between the client and the server was interrupted or rejected.

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Failed to Login: Invalid Session

This error occurs when the user has an expired or invalid session token. When a user logs into a server they are given a token to validate that the account is active. Therefore, if the game server detects that this token is incorrect, the user cannot log in.

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Failed to Login: Null

This error indicates a communication failure or an undetected internal error between the Minecraft server and the Mojang/Microsoft network. It is usually the result of a temporary issue with the authentication servers or a network problem that prevents the delivery of that verification response.

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The authentication Servers Are Currently Not Reachable

This error clearly tells the user that the Minecraft client cannot establish contact with Mojang/Microsoft’s authentication servers. This can be due to various reasons: an outage of the official servers, a network issue on the user’s end or a firewall/antivirus blocking the connection.

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