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Java Native Crash

The JVM crashes hard with an access-violation and writes an hs_err_pid file. This is a native-level crash, below Minecraft, usually tied to graphics drivers, native libraries, or hardware rather than game logic.

What does this error mean?
EXCEPTION_ACCESS_VIOLATION means native code (not Java) tried to touch invalid memory and the JVM aborted. The hs_err_pid log it produces names the problematic frame, frequently a graphics driver or a native library, which points at the real cause. 
EXCEPTION_ACCESS_VIOLATION
Most Common Causes
  • Outdated or buggy GPU drivers (client side).
  • A buggy native library bundled by a mod.
  • Faulty RAM or other hardware issues.
  • An unstable or mismatched Java build.
  • Overclocking instability.
How To Diagnose
  1. Open the hs_err_pid file and read the 'Problematic frame'.
  2. Note any driver (e.g. a GPU dll) or native library named there.
  3. Check whether it is client (graphics) or server (library) side.
  4. Test after updating drivers / removing a suspect mod.
Recommended Fixes
  • Update GPU drivers
    On the client, install the latest graphics drivers, this resolves many native crashes.
  • Remove the native-library mod
    If a mod's native lib is named, update or remove that mod.
  • Test the hardware
    Run a memory test and check temperatures if crashes are random.
  • Use a stable Java
    Switch to a mainstream JDK build and disable any overclock.
Analyze My Log
Frequently Asked Questions

A crash log the JVM writes on a native crash. The 'Problematic frame' line is the key clue.

Rarely, native crashes usually come from drivers, native libraries, or hardware.

Graphics-driver frames point to the client. Library frames can affect either side.