As the error is happening when Apache is trying to write output to the network connection (browser), it is unlikely that this has to do with the CGI script's content generation.  Common reasons for this info message are a flaky network connection, the user at the browser being impatient and pressing Esc before the page has finished loading, etc.

What isn't clear to me from your description: are you actually sitting at the browser watching the connection being cut without you doing anything (i.e. the page failing to load), or are you just seeing those messages in your log file without knowing what's happening at the user/browser side?

In reply to Re: CGI page sometimes do not loading, apache write error by almut
in thread CGI page sometimes do not loading, apache write error by simak

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