Dear Monks,

I'm using CGI.pm's upload_hook functionality to write yet another upload-with-progress module.

It now works well, but I experienced a problem along the way and would like to get further input; basically, on files bigger than 2.5M it would stall, needing to be killed.

The test script runs inside of a standard CGI environment. The hook merely computed progress, then wrote to a log using the write_file function from File::Slurp.

I progressively ruled out buffering, memory footprint, and even debugged CGI.pm to no avail.

After a while I guessed that it might be running up against per-process file descriptor limits, and confirmed it by switching to IO::File, and building the hook as a closure which closed over the open IO::File object.

My question is: Why would the script stall?
Should it not just die in some way?

In reply to Exhausting filehandles behaviour? by bollock

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