Whats the best way to update a server jar for production without stopping/starting & using restart?

[TomLewis]

I have an autoamted restarted every day, If I download a new PurPur, I want to be able to put it somewhere that itll auto update after restart, Ive read that just deleting the old JAR while its still running isnt good practise, and overwriting it is the same thing.

Can this be done with mark2 as its a wrapper? Seems like a job mark2 should do.

When its picking a jar it should be looking for the highest filename number, that would be simple enough.

[Column01]

mark2 has a .reload command which rescans the mark2.properties if you want to hard code the file name and a .jar command which tells mark2 to switch to the new jar file it finds following your pattern in the mark2.properties file for your jar file.

What you could do is:

1. Make sure your mark2.properties jar pattern uses a wildcard like purpur*.jar where purpur-10.jar and purpur-11.jar would be examples of the updated jar name
2. Update your jar file by downloading the new one and placing it in the server directory
3. Open mark2 and run .jar to tell mark2 to change jars at the next restart
4. Delete the file the old jar file the next day or whenever the server restarts next

There will be a message in the console telling you the new jar name it will switch to for a sanity check and when it restarts next, it will change to that file.

[TomLewis]

Open mark2 and run .jar to tell mark2 to change jars at the next restart

TIl there is a .jar command!

is it safe to delete the old jar while its still running?

[Column01]

No, the server must be restarted first

…

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[TomLewis]

Just tried running .jar on my test server thats on the same box as my survival, which made my survival restart somehow?
server might have crashed: not accepting connections or wrong port is being pinged. -- restarting. luckily it was quiet.

[Column01]

That's unrelated to .jar and probably means it froze or something and its just a coincidence.

[TomLewis]

Nope, it was the reason! The server was not under stress and there were no errors from any plugins or a crash report, and it happened right after I run that command.