[mapserver-dev] WMS GetCapabilities response truncated to 4096 bytes on windows 2008 Server

Tamas Szekeres szekerest at gmail.com
Thu Jan 19 17:18:18 EST 2012

I have also found this thread which describes exactly the same issue:


2012/1/19 Jeff McKenna <jmckenna at gatewaygeomatics.com>

> I can verify that this problem exists, it seems to be intermittent, and
> has been around a while.  I also think it occurs on more Windows versions
> than are listed here.
> -jeff
> On 12-01-19 5:51 PM, Tamas Szekeres wrote:
>> Hi Devs,
>> We have experienced strange behaviour of the WMS GetCapabilities
>> response of MapServer CGI on Windows 2008 and Windows 7 which is
>> truncated to 4k in size. The same thing happens when invoking mapserv
>> from the command line and the output is redirected to a file.
>> After a bit of investigation, I came to the conclusion that the process
>> termination doesn't necessarily flush the file buffers (incl. stdout and
>> stderr) on Win 2008 and Win 7. This is primarily an OS behaviour which
>> works correctly on Win2003/XP, but it should probably be fixed in
>> MapServer by calling fflush(NULL) at the right place. It could probably
>> be done in the mapserv application or we could also do such things in
>> msCleanup as well. What would be the most reasonable place to invoke
>> fflush or do you have a more reasonable approach?
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