What do specific warnings mean (maxHealth, "moved too quickly," GC spam, chat validation)? — Minecraft

Q: How do I stop the chat validation warnings specifically?

Set enforce-secure-profile=false in server.properties from the Files tab, then restart. Note this disables signed-chat enforcement.

Minecraft servers print a lot of console text, and most of the yellow lines you see are informational rather than signs of a problem. This guide explains a few of the most common warnings so you can tell the harmless noise from something that actually needs your attention.

What these warnings mean

Here are the ones people ask about most often:

"moved too quickly" / "moved wrongly" — usually harmless lag or a fast-movement mod acting up. If it spams persistently, it can point to low TPS (the server struggling to keep up).
"Attribute generic.maxHealth" — a mod or plugin is setting a player's or mob's health in an unusual way. This is almost always harmless.
"Can't keep up!" / GC spam — a performance signal. The server is running behind or spending too long collecting memory. See our lag and performance articles.
Chat validation / secure-profile warnings — tied to Minecraft's chat-reporting system. If you want them gone, set enforce-secure-profile=false in server.properties.

How to tell what matters

Not every red or yellow line is an emergency. Focus your attention on red/severe errors and full crash reports rather than routine warnings.

Open the Console tab and read the lines in context.
Ask yourself: did the server still reach "Done" and stay online? If so, the warning is informational.
If a line is followed by a stack trace and the server stops, that's a real crash worth investigating.
To get a second opinion, use the "Share logs via mclo.gs" button in the Console and send us the link.

Tip: A running, joinable server that shows a few yellow warnings is completely normal. Don't chase every message.

Frequently asked questions

Should I try to silence every warning? No. Most are harmless and part of normal operation. Silencing them can hide useful information later.

How do I stop the chat validation warnings specifically? Set enforce-secure-profile=false in server.properties from the Files tab, then restart. Note this disables signed-chat enforcement.

Where do I look if a warning turns into a crash? Open the Console, scroll to the crash, and share it via mclo.gs so our team can read the full trace.