Minecraft Exit Code 0 is deceptive — exit code 0 means the process terminated normally in Java. When the launcher reports this as an error, it usually means the game window closed without the launcher expecting it, which can happen if the game crashed in a way the launcher didn't detect, or if a mod or plugin exited the JVM cleanly after a fatal error.
Check crash reports
Even though exit code 0 suggests a clean exit, check .minecraft/crash-reports/ for any crash report files generated at the same time. A mod might have called System.exit(0) after catching an error, masking the real cause.
Mod causing clean exit
Some poorly written mods catch exceptions and call System.exit(0) to terminate, producing exit code 0 instead of a crash report. Disable mods one by one (starting with recently added ones) to find the culprit.
How to fix step by step
- 1Check .minecraft/crash-reports/ for any logs generated at the time of the exit
- 2Disable all mods and test vanilla Minecraft — if it works, re-enable mods in batches to find the conflict
- 3Update all mods to their latest versions
- 4Reinstall the Minecraft Launcher if the issue persists on vanilla
How EXIT-CODE-0 differs from related codes
- Error EXIT-CODE-1: The Java Virtual Machine running Minecraft crashed and exited with code 1, indicating a fatal error. This is typically a Java or mod compatibility issue. (user-side)
- Error CRASH-REPORT: Minecraft's Java Virtual Machine (JVM) encountered a fatal error that could not be caught by the game. A crash-report or hs_err_pid log file was created containing the stack trace and error details. (usually client-side)
- Error JAVA-HEAP-SPACE: Minecraft ran out of allocated Java heap memory. The JVM cannot allocate more objects because all configured RAM is used. This causes an immediate crash. (usually client-side)