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Server consoles will usually output SocketExceptions.

Exception ticking world

Exception in world tick

Exception while updating neighbors

[SOLVED] Connection Lost from localhost

Null Pointer Exception mounting horse

Connection Lost when pressed Tab after /scoreboard teams option <team> color

Unable to logging into my own server

Giving items with unknown (high) data value crashes and leaves the world unusable

Linux: "Open Game Dir" fails and throws exception

java.io.IOException: Stream Closed by closing minecraft

NPE when logging in

ERROR Attempted to append to non-started appender ServerGuiConsole

EXCEPTION_ACCESS_VIOLATION (0xc0000005)

org.lwjgl.LWJGLException: Could not create context

Loot table exceptions are not caught

Parsing exceptions count as unsuccessful execution but still execute the command

Spelling mistake for Json parsing exception for score with missing name or objective

/playsound command is not validating arguments correctly

Stack trace is not printed in log when exception occurs while running command

Providing wrong property values for blocks throws exception instead of ignoring property

writeString method of PacketBuffer is not creating correct exception text

Server does not test if some files exist before trying to interact with them

failed to connect ot the server internal exception: java.lang.nullpointerexception

Trying to load a non-existent structure writes exception type to log

Unhandled exceptions in commands just dump the exception into chat, without the "unknown error" message

Log files are HUGE (5GB) because Brigadier also logs errors continuously.

File already exists exception (saves folder) symlink issue