Need a Minecraft server? BeastNode offers the highest performance servers with DDoS protection!

Shop for plans now

Failed to check session lock

Failed to check session lock errors can occur randomly and usually begin with this line:
net.minecraft.server.WorldConlictException: Failed to check session lock, aborting

It will cause your server to crash. The fix for this is to simply navigate to your world folders and delete the session.lock files in them, then restart your server.

  • 43 Users Found This Useful
Was this answer helpful?

Related Articles

Server Crash / Port Bind Errors

In certain situations where your server is overloaded or simply just bugged due to plugins and/or...

Chunk Corruption Errors

[INFO] Chunk (42, -2) stored at (35, -28) [SEVERE] java.lang.Throwable[SEVERE] at...

Read Timed Out Errors

Read timed out errors are like a server crash in that you cannot join your server any longer, but...

Out of Memory

Usually, out of memory errors (and other errors that are similar) is due to your server basically...

Could not add user to the whitelist

The [Server] Server thread/INFO Could not add [user]to the whitelist error is most common with...