On 31 Dec 2000, Stephen A. Cochran wrote:

>  --- Stas Bekman wrote:
>  On 17 Nov 2000, Stephen A. Cochran wrote:
>  > 
>  > I have a program which runs fine 90% of the time under mod_perl. About 10% of
>  > the time Netscape reports "Document contains no data". Looking at the socket
>  > traffic, the client receives an orderly release indication (T_ORDEL_IND = 132)
>  > on the socket and reponds with a orderly release request, which closes the
>  > socket. 
>  
>  
>  run it in single mode and attach to the process with strace(1) or truss(1)
>  (depending on what you have). See the debug chapter in the mod_perl guide.
>  --- end of quote ---
>  
>  Thanks for the suggestions from the list for this problem. The strace/truss
>  probably would have helped solve the problem, too bad Digital Unix doesn't have
>  either : (
>  
>  After two months I finally tracked it down. Turns out that in an infrequently
>  called sub to handle minor error conditions, there was a line "close STDERR".
>  The comment from the author said it was to "kill any ugly errors that havne't
>  made it out yet ...". Not really sure what he really wanted to do originally,
>  but that was the problem.
>  
>  Anytime a process which had executed this code under mod_perl received another
>  mod_perl request, the browser displayed the "Document contains no data" error
>  due to the sequence of requests as described above in my original post. I just
>  confirmed this with a short script which only does "close STDERR".
>  
>  Thought I'd post this in case someone else ever runs into this, or it's a bug.
>  Not sure of closing STDERR is a common practice in CGIs, but maybe a gotcha for
>  the porting guide. 

If you replace:

  close STDERR;

with:

  open STDERR, '> /dev/null' or die "Can't write to /dev/null: $!";

do you still have the same problem?

_____________________________________________________________________
Stas Bekman              JAm_pH     --   Just Another mod_perl Hacker
http://stason.org/       mod_perl Guide  http://perl.apache.org/guide 
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