Issues occur when trying to remove players from the queue at high player counts.

[KarlOfDuty]

Hello, we use your queue system on EarthMC and when the queue gets up to around 150 players it starts to spam errors such as this:

As it is attempting to remove items from the linked list at position 0 I assume the issue is some concurrent modification and not that the position isn't indexed.

[blomer]

Try bumping up the RAM on your bungee proxy.

[KarlOfDuty]

It's already at 3gb so it should be way more than enough, but switching to use an ArrayList instead of a LinkedList appears to have solved the issue. The theoretical drop in performance from the switch should be insignificant anyway.