Tried to improve error output a bit.
Tweaked error message to avoid repetition.
Modified code to use the local tmp directory, and then added a README file so the temp directory would be created on the server.
Oops, created the README and tmp directory in the wrong place. 3am errors ...
Giving up; let's see what Hadoop is actually outputting.
Fixed endline issues.
Redirected STDERR onto STDOUT.
Try another way.
What's wrong with this command line?!
ugh
ugh
Trying another strategy: wrapping everything in Mojolicious.
Turning the command line back on and fixing a bug in the way hadoop works.
Fixed the return code from the qx(...).
Updated the error message with a link back to the main form.