[mapserver-dev] Problem when using the ECW support for MapServer via GDAL (GetCapabilities response truncated)

[ah1010]

We have 4 MapServers in our organization and we encountered a sudden problem
on all of them at the same time.

Since about 3 weeks ago, The GetCapabilities response from the server is
truncated exactly after 4084 bytes.
We tried to look for the possible causes in the forums and documentations
with no results
It seems that we are not the first ones to have this problem, but no answers
found.
(http://osgeo-org.1560.x6.nabble.com/GetCapabilities-response-being-truncated-td4237078.html)

Eventually we discovered that it has something to do with the ECW support:
Whenever we remove the gdal_ECW_JP2ECW dll from c:/ms4w/gdalplugins it
works.

also,
when we run the mapserv.exe from the command line and print the output to
the screen, the getCapabilities returns fine,
but if we print the output to a file (mapserv.exe
QUERY_STRING="map=c:/ms4w/maps/main.map&request=GetCapabilit
ies&SERVICE=WMS&version=1.3.0" > geomap.xml) the same problem occurs and we
get appcrash
Problem signature:
  Problem Event Name:	APPCRASH
  Application Name:	mapserv.exe
  Application Version:	0.0.0.0
  Application Timestamp:	4fc105ff
  Fault Module Name:	ntdll.dll
  Fault Module Version:	6.1.7601.18247
  Fault Module Timestamp:	521ea8e7
  Exception Code:	c0000005
  Exception Offset:	000332b0
  OS Version:	6.1.7601.2.1.0.768.3
  Locale ID:	1037
  Additional Information 1:	0a9e
  Additional Information 2:	0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:	0a9e
  Additional Information 4:	0a9e372d3b4ad19135b953a78882e789. 

  
Could this be related to recent licensing issues with Erdas' ECW support?
anything else?



truncated response examples:
For example:
http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&request=GetCapabilities&SERVICE=WMS&version=1.3.0

Responded with 
<?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>
<WMS_Capabilities version="1.3.0"  xmlns="http://www.opengis.net/wms"  
xmlns:sld="http://www.opengis.net/sld"  
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
xmlns:ms="http://mapserver.gis.umn.edu/mapserver"  
xsi:schemaLocation="http://www.opengis.net/wms
http://schemas.opengis.net/wms/1.3.0/capabilities_1_3_0.xsd 
http://www.opengis.net/sld
http://schemas.opengis.net/sld/1.1.0/sld_capabilities.xsd 
http://mapserver.gis.umn.edu/mapserver
http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&service=WMS&version=1.3.0&request=GetSchemaExtension">



<Service>
  <Name>WMS</Name>
  <Title>main</Title>
  <OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/>
  <ContactInformation>
  </ContactInformation>
  <MaxWidth>2048</MaxWidth>
  <MaxHeight>2048</MaxHeight>
</Service>

<Capability>
  <Request>
    <GetCapabilities>
      <Format>text/xml</Format>
      <DCPType>
        <HTTP>
          <Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Get>
          <Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Post>
        </HTTP>
      </DCPType>
    </GetCapabilities>
    <GetMap>
      <Format>image/jpeg</Format>
      <Format>image/png</Format>
      <Format>image/gif</Format>
      <Format>image/png; mode=8bit</Format>
      <Format>application/x-pdf</Format>
      <Format>image/svg+xml</Format>
      <Format>image/tiff</Format>
      <Format>application/vnd.google-earth.kml+xml</Format>
      <Format>application/vnd.google-earth.kmz</Format>
      <DCPType>
        <HTTP>
          <Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Get>
          <Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Post>
        </HTTP>
      </DCPType>
    </GetMap>
    <GetFeatureInfo>
      <Format>text/plain</Format>
      <Format>application/vnd.ogc.gml</Format>
      <DCPType>
        <HTTP>
          <Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Get>
          <Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Post>
        </HTTP>
      </DCPType>
    </GetFeatureInfo>
    <sld:DescribeLayer>
      <Format>text/xml</Format>
      <DCPType>
        <HTTP>
          <Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Get>
          <Post><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Post>
        </HTTP>
      </DCPType>
    </sld:DescribeLayer>
    <sld:GetLegendGraphic>
      <Format>image/jpeg</Format>
      <Format>image/png</Format>
      <Format>image/gif</Format>
      <Format>image/png; mode=8bit</Format>
      <DCPType>
        <HTTP>
          <Get><OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="http://127.0.0.1/cgi-bin/mapserv.exe?map=c:/ms4w/maps/main.map&"/></Get>
          <Post><OnlineResource xmlns:xlink="http://www.w3.or
		  




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