Server Diagnostics

Find out why Minecraft crashed instead of reading Exit Code 1, and check whether a Java server is up. The log is read in your browser and never uploaded.

Drop latest.log or a crash report here

Forge, NeoForge, Fabric and Quilt — read in this tab, never uploaded.

Choose file

…or paste it

Nothing is uploaded. Before anything is shown, home directories, IP addresses, account UUIDs and token-shaped fields are masked — but read it before you paste it anywhere public, because a mod can print anything in a format no filter knows.

Quick guides

How to use this tool, and the questions players ask most.

What does exit code 1 mean in Minecraft?

Exit code 1 is a generic error indicating the Java Virtual Machine encountered a fatal exception during runtime. It usually points to incompatible mods, outdated GPU drivers, or an invalid Java configuration in the launcher_profiles.json file.

What causes Minecraft

server exit code 137?

Exit code 137 occurs when the operating system terminates the server process via SIGKILL due to running out of allocated system memory. You can prevent this by increasing the memory limit using the -Xmx4G startup flag in your server launch script.

Why does Minecraft crash with exit code 1 without a crash report?

A crash produces no report when the failure happens before the game engine initializes logging, usually from an invalid JVM argument or incompatible Java runtime. You can inspect the raw console output in launcher_log.txt or paste it into Server Diagnostics to identify the missing dependency.

What does Minecraft

server exit code 0 mean?

Exit code 0 indicates that the Minecraft server shut down successfully with no errors. It occurs when an operator enters the /stop command or when a scheduled automated script halts the server cleanly.

Why does a Minecraft Forge 1.20.1

server crash with exit code 1?

Forge servers on Minecraft 1.20.1 crash with exit code 1 primarily when running on an incompatible Java version instead of Java 17, or when duplicate mod dependencies exist in the mods folder.