How to read Minecraft server logs

Note: Learn how to download and open your Minecraft server logs here.


How to read/understand your Minecraft server logs:
There are five types of terms to look out for when reading logs:
TRACE - This shows you where something is being executed within the program itself.
DEBUG - Checking for bugs to attempt to resolve them.
INFO - Displaying information relative to what the program is currently executing.
FATAL - Something has failed to execute resulting in the program to stop working.
ERROR - Displays where or what is causing the program to stop working.

Example:
The following error occurs because the plugin WorldEdit is not up to date: (1.7.10 > 1.15.2)

28.07 13:26:19 [Server] Server thread/ERROR Error occurred while enabling WorldEdit v5.6.3 (Is it up to date?)
28.07 13:26:19 [Server] INFO java.lang.IllegalArgumentException: Channel must contain : separator (attempted to use WECUI)
28.07 13:26:19 [Server] INFO at org.bukkit.plugin.messaging.StandardMessenger.validateAndCorrectChannel(StandardMessenger.java:503) ~[spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at org.bukkit.plugin.messaging.StandardMessenger.registerIncomingPluginChannel(StandardMessenger.java:216) ~[spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at com.sk89q.worldedit.bukkit.WorldEditPlugin.onEnable(WorldEditPlugin.java:121) ~[?:?]
28.07 13:26:19 [Server] INFO at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:351) [spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:480) [spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugin(CraftServer.java:464) [spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugins(CraftServer.java:378) [spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:457) [spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at net.minecraft.server.v1_15_R1.DedicatedServer.init(DedicatedServer.java:274) [spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:784) [spigot-1.15.2.jar:git-Spigot-a99063f-be6aaf0]
28.07 13:26:19 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_251]

Note: There are hundreds of reasons why your server is underperforming or crashing but it's important to check for FATAL or ERROR outputs to identify the problem. If you can't identify the problem even after reviewing your logs, don't hesitate to contact our team through our 24/7 support tickets. 

If any information you see here is outdated, please let us know by creating a support ticket. Thank you.

 

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