> Hi all,
> I wrote a PHP script running in Apache which takes more than 30 seconds to
> complete. It uses set_time_limit() to extend the time it is allowed to run.
> The script generates thumbnails from a list of images. Upon completion, the
> script redirects the browser to another page using HTTP headers.
> On my local machine (Windows + EasyPHP), the script runs as expected and
> completes after a few minutes.
> I observe an unexpected behavior on my production web server:
> - The script runs as expected for the first 30 seconds.
> - After 30 seconds, the same script with the same parameters starts again in
> a new thread/process. The initial thread/process is *not* interrupted, so 2
> threads/processes run in parallel, executing the same sequence of operations
> with a 30 time shift.
> - The same scenario happens every 30 seconds (i.e.: at 0"30, 1"00, 1"30, and
> so on), multiplying the parallel threads/processes.
> - The browser keeps on loading while the above happens.
> - After some time, the browser displays a blank page and all the
> threads/processes stop. I assume this is due to resources exhaustion, but I
> have no means to check this assumption.
> I deduced the above reading a text file in which I log the sequence of
> called functions.
> Unfortunately I have no access *at all* to my production web server
> configuration (shared hosting, no documentation). I cannot even read the
> configuration settings. While I'm considering moving to another host, I'd be
> extremely pleased to have an explanation of the observed behavior.
> I have browsed the mailing list archives and looked for an explanation in
> other forums to no avail. This thread may deal with the same issue but does
> not include any explanation or solution:
> http://www.networkedmediatank.com/showthread.php?tid=17140
> Thanks for reading, and please do not hesitate to ask for further
> explanations if what I'm trying to achieve was not clear!
> Cheers,
> Marc.

hi Marc,

probably your php file on your production server is index.php.
and you must have generated a image tag with empty src like below:
<img src="">

with src being empty, browsers will load your index.php as if it was
an image url so loading in parallel.
hope this explains your case.

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