[Geotools-gt2-users] ImageMosaicReader and FileNotFoundException (Too many open files)

[Stefan <kr...@wi...>]

Hi=20

I am testing/playing/fighting around with ImageMosaicReader and Image=20
Pyramids.
After removing and adding some MapLayers repetitively, the whole applicatio=
n=20
quickly crashs, starting with the folowing exception in=20
org.geotools.data.shapefile.ShapefileDataStore:
> java.io.FileNotFoundException: some.shp (Too many open files)
But i don't think that the ShapefileDataStore has much to do with this...

Looking at my open files on linux (lsof) showed me that all tiles of the=20
ImageMosaic ( which was already removed as a MapLayer) were still open!

I figured that the following piece of code in the main loop in=20
ImageMosaicReader.java near line 835 could be the reason. I would guess tha=
t=20
ImageIO.createImageInputStream(imageFile) should to be closed by us after=20
JAI.create ??

> 		imageFile =3D new File(new StringBuffer(parentLocation).append(
> 				File.separatorChar).append(location).toString());
> 		pbjImageRead =3D new ParameterBlock();
> 		pbjImageRead.add(ImageIO.createImageInputStream(imageFile));
> 		pbjImageRead.add(imageChoice);
> 		pbjImageRead.add(readMetadata);
> 		pbjImageRead.add(readThumbnails);
> 		pbjImageRead.add(verifyInput);
> 		pbjImageRead.add(null);
> 		pbjImageRead.add(null);
> 		pbjImageRead.add(readP);
> 		pbjImageRead.add(null);
> 		loadedImage =3D JAI.create("ImageRead", pbjImageRead);
> 		if (LOGGER.isLoggable(Level.FINE))
> 			LOGGER.fine("Just read image number " + i);

If i am wrong, and  JAI needs an open InputStream to get data on demand, th=
en=20
how can the FileHandles used my a MapLayer that uses a ImageMosaicReader be=
=20
freed when removing the MapLayer??=20

Thanks and greetings,
Steve

=2D-=20
wiki=C2=B2 - Softwareentwicklung
Stefan Kr=C3=BCger
Stra=C3=9Fburger Weg 26
53113 Bonn

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