Out of memory

java.lang.OutOfMemoryError: Direct buffer memory

What it looks like in the log

java.lang.OutOfMemoryError: Direct buffer memory

How to fix it

  1. Update your rendering and shader mods—especially Iris, Oculus, Sodium, or Embeddium—to the latest build available for your Minecraft version, as older releases had direct buffer leaks when rendering entity shadows and overlays.
  2. Inspect your launcher's JVM arguments and remove any `-XX:MaxDirectMemorySize` flag so Java can manage direct memory automatically (or raise the value to at least `-XX:MaxDirectMemorySize=2G`).
  3. Check your RAM allocation (`-Xmx`) and ensure at least 2 to 4 GB of your computer's total physical RAM remains unallocated so your operating system and GPU drivers have room for off-heap buffers.
  4. Lower your shader Shadow Distance, reduce Render Distance, or remove high-resolution (256x+) resource packs if the crash happens in visually dense areas.
LoadersFabric, Quilt, Forge, Neoforge, Vanilla
SeverityStops the game
CategoryOut of memory

Check your own log

Related errors

Out of memoryCould not reserve enough space for object heapYou asked for more memory than the machine can giveOut of memoryMinecraft Crash: java.lang.OutOfMemoryError (Heap or Native Memory Exhausted)Increase your allocated Java memory (`-Xmx`) in your launcher's instance settings or your server's `run.bat`/`Out of memoryOutOfMemoryError: Cannot Reserve Bytes of Direct Buffer MemoryInspect your launcher's JVM arguments and delete any -XX:MaxDirectMemorySize=... parameter if one was added byOut of memoryOutOfMemoryError: Java heap spaceRaise the allocated memory in your launcher (-Xmx)Out of memoryOutOfMemoryError: MetaspaceMetaspace holds class definitions, not world data — raising -Xmx does nothingOut of memoryjava.lang.OutOfMemoryError: Failed to allocate bytes (Off-Heap Rendering Memory)Update Iris Shaders, Sodium, and visual entity mods (such as Illuminations) to the latest builds available for