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Posted to users@tomcat.apache.org by sp...@gmx.eu on 2010/12/21 16:20:03 UTC
java.lang.ClassCastException: com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader cannot be cast to com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader
Hi,
running under W2K3, tomcat 6.0.26 and java 1.6_22 I get after a while:
java.lang.ClassCastException:
com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader cannot be cast to
com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader
at:
Iterator it = ImageIO.getImageReadersByFormatName("TIF");
r = (TIFFImageReader)it.next(); //<==BANG
When I restart tomcat, everything is fine again for some hours and the it
happens again until tomcat is restartet.
It seems that somewhat reloads the webapp which uses TIFFImageReader but
that plugin is still somewhere in another classloader which causes this CCE
then.
The problem is: No one explicitly reloads the app. Nothing to be seen in the
logs. The app is the only app on this tomcat.
NO JreMemoryLeakPreventionListener is configured in server.xml.
What can be the problem here?
Thank you
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RE: java.lang.ClassCastException: com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader cannot be cast to com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader
Posted by sp...@gmx.eu.
> ImageIO pins the classloader it first uses. So if that's a
> WebappClassloader & you subsequently reload the app you'll have a
> memory leak & the potential for class cast exceptions.
As I said, nobody reloads the app (at least I cannot see this in the logs).
It just happens after a while.
> The leak prevention stuff handles this, but you've turned it off.
When I active the listener I get a NPE...
Iterator it = ImageIO.getImageReadersByFormatName("TIF");
r = (TIFFImageReader)it.next(); //<== NPE
Thank you!
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Re: java.lang.ClassCastException: com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader
cannot be cast to com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader
Posted by Pid * <pi...@pidster.com>.
On 21 Dec 2010, at 15:20, "spring@gmx.eu" <sp...@gmx.eu> wrote:
> Hi,
>
> running under W2K3, tomcat 6.0.26 and java 1.6_22 I get after a while:
>
> java.lang.ClassCastException:
> com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader cannot be cast to
> com.sun.media.imageioimpl.plugins.tiff.TIFFImageReader
>
> at:
>
> Iterator it = ImageIO.getImageReadersByFormatName("TIF");
> r = (TIFFImageReader)it.next(); //<==BANG
>
> When I restart tomcat, everything is fine again for some hours and the it
> happens again until tomcat is restartet.
>
> It seems that somewhat reloads the webapp which uses TIFFImageReader but
> that plugin is still somewhere in another classloader which causes this CCE
> then.
>
> The problem is: No one explicitly reloads the app. Nothing to be seen in the
> logs. The app is the only app on this tomcat.
>
> NO JreMemoryLeakPreventionListener is configured in server.xml.
>
> What can be the problem here?
ImageIO pins the classloader it first uses. So if that's a
WebappClassloader & you subsequently reload the app you'll have a
memory leak & the potential for class cast exceptions.
The leak prevention stuff handles this, but you've turned it off.
>
> Thank you
>
>
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> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
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