Minecraft server fails to open

Question

Whenever I try to launch a Minecraft server, either by double-clicking the JAR or by executing it via PowerShell / Command Prompt, I keep getting the same error:

[12:00:25] [main/ERROR]: Errors with built-in recipes!
[12:00:25] [Server thread/INFO]: Starting minecraft server version 1.12.2
[12:00:25] [Server thread/INFO]: Loading properties
[12:00:25] [Server thread/INFO]: Default game type: SURVIVAL
[12:00:25] [Server thread/INFO]: Generating keypair
[12:00:25] [Server thread/INFO]: Starting Minecraft server on *:25565
[12:00:25] [Server thread/INFO]: Using default channel type
[12:00:25] [Server thread/INFO]: Preparing level "world"
[12:00:25] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.UnsupportedOperationException: null
        at com.sun.nio.zipfs.ZipFileSystemProvider.ensureFile(ZipFileSystemProvider.java:96) ~[zipfs.jar:1.8.0_151]
        at com.sun.nio.zipfs.ZipFileSystemProvider.newFileSystem(ZipFileSystemProvider.java:110) ~[zipfs.jar:1.8.0_151]
        at java.nio.file.FileSystems.newFileSystem(Unknown Source) ~[?:1.8.0_151]
        at java.nio.file.FileSystems.newFileSystem(Unknown Source) ~[?:1.8.0_151]
        at ns.a(SourceFile:133) ~[minecraft_server.1.12.2.jar:?]
        at ns.a(SourceFile:73) ~[minecraft_server.1.12.2.jar:?]
        at ns.<init>(SourceFile:66) ~[minecraft_server.1.12.2.jar:?]
        at oo.b(SourceFile:164) ~[minecraft_server.1.12.2.jar:?]
        at net.minecraft.server.MinecraftServer.a(SourceFile:281) ~[minecraft_server.1.12.2.jar:?]
        at nz.j(SourceFile:233) ~[minecraft_server.1.12.2.jar:?]
        at net.minecraft.server.MinecraftServer.run(SourceFile:434) [minecraft_server.1.12.2.jar:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_151]
[12:00:25] [Server thread/ERROR]: This crash report has been saved to: C:Usersavi12OneDriveDocumentsWebStormMinecraft server.properties GeneratorMinecraft server.crash-reportscrash-2017-11-04_12.00.25-server.txt
[12:00:25] [Server thread/INFO]: Stopping server
[12:00:25] [Server thread/INFO]: Saving players
[12:00:25] [Server thread/INFO]: Saving worlds
[12:00:25] [Server Shutdown Thread/INFO]: Stopping server
[12:00:25] [Server Shutdown Thread/INFO]: Saving players

Thanks for helping!

Bravewave · Answer

Make sure you have set all your files up correctly. Download minecraft_server.1.12.2.jar from the official webpage and put it in its own folder.

Rather than using a command to run your server, I would recommend using a .bat file for consistency, as well as to facilitate the spotting of errors.

Open Notepad (or any other text editor) and paste this in:

java -Xms1024M -Xmx2048M -jar minecraft_server.1.12.2.jar nogui
pause

Then go to File > Save As and rename the file to start_server.bat. Remember to change the drop down box from Text File to All files.

Double click to run the batch file and the server should run.

Minecraft server fails to open

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