Panic

Things can go wrong at progzoo.net You may be able to fix them

Corruption at the server

This is mostly caused by a queue getting corrupted. Progzoo queues all requests so that there are only a limited number of jobs running at any one time.

• The queue is stored in JSON format - due to Andrew's dumbness this can get corrupted.
• In that case you can trash the queue.
  • This means that all waiting jobs will be lost so don't trash it unless
    • it is corrupt (because when it is corrupt no one is going to get served)
    • you are authorised to do this
    • you really, really want to

You can see the queue by visiting http://progzoo.net/r.cgi?lang=java Change lang to one of java cs cpp pl php py rb vb

You can trash the queue by visiting http://progzoo.net/r.cgi?lang=java&trashTheQueue=0 - but change the 0 to 1.

Before trashing the queue please copy it and send it to me at ajcumming@gmail.com with any other information that might be useful.

Server Health Check

Use

• health http://progzoo.net/health/146.176.166.22 to find out if the host machine is working.
• hello http://progzoo.net/hello/146.176.166.22 to compile and execute "Hello World" on the guest.

The other machines are listed at http://progzoo.net/w/extensions/r.cgi?dashboard=1

Restart the virtual server

The command /home/andrew/runUML.sh contains the following:

rm pz.fs.cow
screen -d -m /home/andrew/kernel64-2.6.24 ubda=/home/andrew/pz.fs.cow,/home/andrew/pz.fs mem=228M eth0=tuntap,tap1 umid=umid

Another way to kill the guest server(s) (if you don't have mconsole)

kill `cat .uml/*/pid`