imageserver implemented in servlet sometimes shows troubles

First thank to all developers who make the new update possible. I'm looking out for it..
I don't know if it is a bug (known or not) but the imageserver class shows some problems.
I've build a singleThread servlet that handles requests done by applets installed on client machines. The applet does
a request to the servlet, the servlet processes the request and sends back a GIF image.

The imageserver uses the ShapeLayer to create the maps. I've noticed something about this layer and a bug and it's
also therefore that i send this mail.

I must say, it happens now and then, mostly when the server gets a few requests after each other. Sometimes it
seems no problems exist. It might have something to do with system resources, but i don't see any errrors in the
message tracing of JBuilder6. When the error occurs, all other requests fail as well without errors created. So a idea
of how to check if the imageServer is still running well might help a bit as well.

Like now I am typing this mail, I can't get it down ;-)

this is the function that creates the imagebytes:

{ CODE }

public byte[] renderdata(float newlatfloat, float newlonfloat,float newzoomfloat)
  {
      //initialisatie benodigde tijdelijke variabelen
      byte bytes[]=null;
      //

      com.bbn.openmap.proj.Mercator m = new com.bbn.openmap.proj.Mercator(new
com.bbn.openmap.LatLonPoint(newlatfloat,newlonfloat),newzoomfloat,returnimagewidth,returnimageheight);
      System.out.println("still busy rendering");

      try
      {
        ///////testIS.wait(1500);
        bytes = testIS.getMapImage(m);
      }
      catch(Exception ex) {System.out.println(ex.toString());}
      
      System.out.println("rendered");

      return bytes;
  }

{ END CODE }

in the function that communicates with the client the following happens:
{ CODE }

   response.setContentType("image/gif");
      OutputStream out = response.getOutputStream();
      System.out.println("writing stream");
      out.write(this.renderdata(templat,templon,zoomfloat));
      System.out.println("written");

{ END CODE }

the imageserver properties have about the following:

#
ddd=lll
layers=loclayer1 marker_name2 layer1

## stedelijke bebouwing
 marker_name2.prettyname=steden
 marker_name2.class=com.bbn.openmap.layer.shape.ShapeLayer
 marker_name2.shapeFile=/data/nlmapswgs84/Ref_A_WGS84/nlbk_r01.shp
# marker_name2.spatialIndex=<path to generated spatial index file (.ssx)>
 marker_name2.lineColor=ff000000
 marker_name2.fillColor=FA0A0A
 # plus any other properties used by the DrawingAttributes object.
 #marker_name2.pointImageURL=<URL for image to use for point objects>
 #marker_name2.enabled=true/false

layer1.class=com.bbn.openmap.layer.shape.ShapeLayer
layer1.prettyName=wereldkaart
layer1.shapeFile=/data/openmapdata/shape/dcwpo-browse.shp
layer1.lineColor=ff000000
layer1.fillColor=06C797
 # Add other attributes as required by layer1...
  

Martijn van der Pauw, internetontwikkelaar.
Meteo Consult
martijn@weer.nl
tel: 0317 - 399800
fax: 0317 - 423164
http://www.weer.nl

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