OutOfMemoryError when using WorldEdit

[Supermarcel10]

OutOfMemoryError when using WorldEdit

[Supermarcel10]

Upon investigating further, it doesn't seem to be an issue with the modpack, but rather entirely WorldEdit. It seems there is a bug with how WorldEdit calculates something based on allocated memory.

When using a container (which was my case), I didn't set a max memory size, since I didn't have the need to - I just allowed it to use as much as the container has assigned for CPU, Mem and Disk.

It seems to be an issue with WorldEdit basing something on the allocated memory size, either using -XX:MaxRAMPercentage=95.0 or -Xmx{MEMORY_SIZE}m. It would probably be a wise idea to get that checked and fixed either way, since it doesn't seem so smart to kill the entire main thread because WorldEdit felt like it.

[me4502]

You most likely have a very broken mod that's abusing the concept of block states. Mods like WorldEdit inherently need to list all block states that exist in the game, which is a near-instant and fairly light process.

If a mod abuses block states to the point where there are hundreds of millions on the server, then it can take a while and use a lot of resources. This is an issue with whatever mod is abusing block states, as that data should be in BlockEntity data at that point. In newer versions we have detectors that will tell you what mods are causing these issues.