Re: [Geoserver-users] Problem configuring JPEG WorldImages (works with identical PNG)

[Andrea A. <and...@ge...>]

On Fri, Feb 5, 2016 at 6:30 PM, César Martínez Izquierdo <
ces...@gm...> wrote:

> Caused by: java.util.NoSuchElementException
>     at
> com.sun.imageio.plugins.jpeg.ImageTypeIterator.next(JPEGImageReader.java:1722)
>     at
> com.sun.imageio.plugins.jpeg.ImageTypeIterator.next(JPEGImageReader.java:1694)
>     at
> org.geotools.coverage.grid.io.AbstractGridCoverage2DReader.setLayout(AbstractGridCoverage2DReader.java:1164)
>

By the looks of this error it seems that the Java own JPEG reader cannot
recognize this JPEG variant.

Never seen this error, but I agree with Jukka, serving world files is a
recipe for slowness, there
is no inner tiling, every time one has to go, read and un-compress the
entire image even if
the area of interest is a small bit.

Anyways, as an alternative to try out, you could install the turbo-jpeg
extension:
http://docs.geoserver.org/latest/en/user/extensions/libjpeg-turbo/index.html

It is advertised as an output format, but as far as I know the library also
comes as a reader
which might replace the Java built in one. You might give a go at it and
see if this
one car read your file.

In any case, I'd open a ticket and attach a sample file that cannot be
opened.

Cheers
Andrea


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