When the users delete their cookies, they get new sessions and the old session files are abandoned. (I assume that randomfile is a random file name and that you are not storing every session in a file literally named randomfile.)

I will guess that every request carries the session cookie and the errors occur due to simultaneous requests (for images or other supporting resources) and your application is not being sufficiently careful with session handling, causing locking conflicts. Something like:

  1. User requests /foo
  2. /foo is HTML referencing /foo.css and /bar.png
  3. User's browser initiates concurrent requests for those resources, possibly while still retrieving /foo itself
  4. Server handles requests concurrently, attempting to load session data for the secondary requests and colliding with the session update lock as the retrieval of /foo completes

The answer is either to avoid loading the session for subsidiary requests or to use a session store with better concurrent access performance. PostgreSQL usually works very well.

In reply to Re: Perl temporarily unavailable error by jcb
in thread Perl temporarily unavailable error by newperldeveloper

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