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Your Minecraft Server Wants Java 25, Not Java 26

Your Minecraft Server Wants Java 25, Not Java 26

Every six months the same thread appears and nobody maps the JVM engineering onto what a Minecraft server actually does. This does — version by version, with the flag most guides still tell you to set that will eventually stop your server from booting.

Ask Java for AES and You Get ECB. Nobody Warns You.

Ask Java for AES and You Get ECB. Nobody Warns You.

Cipher.getInstance("AES") compiles, runs, encrypts, decrypts, and hands you the weakest mode in the box. Here is the OpenJDK source that makes that decision, and the line where ECB gets chosen for you.