In our app, we use javax.media.JAI library to scale and improve image

But sometimes (1 out of 10 times), it is causing the VM to crash

```

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007fdb6f49140b, pid=2153, tid=140580255180544
#
# JRE version: 6.0_22-b22
# Java VM: OpenJDK 64-Bit Server VM (20.0-b11 mixed mode linux-amd64 compressed oops)
# Derivative: IcedTea6 1.10.4
# Distribution: Fedora release 16 (Verne), package fedora-61.1.10.4.fc16-x86_64
# Problematic frame:
# C  [libgs.so+0x16940b]  s_DCT_set_defaults+0x8b
#
# An error report file with more information is saved as:
# /usr/share/tomcat/hs_err_pid2153.log
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
#   http://icedtea.classpath.org/bugzilla
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

```

Adding logs to code did help to nail down the exact line 

```

                DebugHelper.errorLog("Start transformImage2");
        List modImages = new ArrayList();
        PageImage page = new PageImage();

        // generate rendered image.
        RenderedOp im = JAI.create("fileload", image.getFile()
                .getAbsolutePath());

        // get the width and height of original image.
        float width = im.getWidth();
        float height = im.getHeight();

        // improve the quality of image.
        DebugHelper.errorLog("Improving quality of image");
        RenderingHints qualityHints = new RenderingHints(
                RenderingHints.KEY_RENDERING,
                RenderingHints.VALUE_RENDER_QUALITY);
        qualityHints.put(RenderingHints.KEY_ANTIALIASING,

```

"Start transformImage2" gets printed but "Improving quality of image" does not. So we know it is in those 3-4 lines. Additionally from hs\_err\* file it points to float width = im.getWidth();

```

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j  com.sun.imageio.plugins.jpeg.JPEGImageReader.initJPEGImageReader()J+0
j  com.sun.imageio.plugins.jpeg.JPEGImageReader.(Ljavax/imageio/spi/ImageReaderSpi;)V+174
j  com.sun.imageio.plugins.jpeg.JPEGImageReaderSpi.createReaderInstance(Ljava/lang/Object;)Ljavax/imageio/ImageReader;+5
j  javax.imageio.spi.ImageReaderSpi.createReaderInstance()Ljavax/imageio/ImageReader;+2
j  javax.imageio.ImageIO$ImageReaderIterator.next()Ljavax/imageio/ImageReader;+16
j  javax.imageio.ImageIO$ImageReaderIterator.next()Ljava/lang/Object;+1
j  com.sun.image.codec.jpeg.JPEGCodec$ImageIOJPEGImageDecoder.(Ljava/io/InputStream;)V+26
j  com.sun.image.codec.jpeg.JPEGCodec$ImageIOJPEGImageDecoder.(Ljava/io/InputStream;Lcom/sun/image/codec/jpeg/JPEGCodec$1;)V+2
j  com.sun.image.codec.jpeg.JPEGCodec.createJPEGDecoder(Ljava/io/InputStream;)Lcom/sun/image/codec/jpeg/JPEGImageDecoder;+6
j  com.sun.media.jai.codecimpl.JPEGImage.(Ljava/io/InputStream;Lcom/sun/media/jai/codec/ImageDecodeParam;)V+35
j  com.sun.media.jai.codecimpl.JPEGImageDecoder.decodeAsRenderedImage(I)Ljava/awt/image/RenderedImage;+29
j  com.sun.media.jai.opimage.CodecRIFUtil.create(Ljava/lang/String;Ljava/awt/image/renderable/ParameterBlock;Ljava/awt/RenderingHints;)Ljava/awt/image/RenderedImage;+184
j  com.sun.media.jai.opimage.JPEGRIF.create(Ljava/awt/image/renderable/ParameterBlock;Ljava/awt/RenderingHints;)Ljava/awt/image/RenderedImage;+4
j  sun.reflect.GeneratedMethodAccessor740.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+48
J  sun.reflect.DelegatingMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
j  java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+161
j  javax.media.jai.FactoryCache.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+6
j  javax.media.jai.OperationRegistry.invokeFactory(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/Object;+57
j  javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/Object;+12
j  javax.media.jai.registry.RIFRegistry.create(Ljavax/media/jai/OperationRegistry;Ljava/lang/String;Ljava/awt/image/renderable/ParameterBlock;Ljava/awt/RenderingHints;)Ljava/awt/image/RenderedImage;+35
j  com.sun.media.jai.opimage.StreamRIF.create(Ljava/awt/image/renderable/ParameterBlock;Ljava/awt/RenderingHints;)Ljava/awt/image/RenderedImage;+191
j  sun.reflect.GeneratedMethodAccessor740.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+48
J  sun.reflect.DelegatingMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
j  java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+161
j  javax.media.jai.FactoryCache.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+6
j  javax.media.jai.OperationRegistry.invokeFactory(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/Object;+57
j  javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/Object;+12
j  javax.media.jai.registry.RIFRegistry.create(Ljavax/media/jai/OperationRegistry;Ljava/lang/String;Ljava/awt/image/renderable/ParameterBlock;Ljava/awt/RenderingHints;)Ljava/awt/image/RenderedImage;+35
j  com.sun.media.jai.opimage.FileLoadRIF.create(Ljava/awt/image/renderable/ParameterBlock;Ljava/awt/RenderingHints;)Ljava/awt/image/RenderedImage;+158
j  sun.reflect.GeneratedMethodAccessor740.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+48
J  sun.reflect.DelegatingMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
j  java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+161
j  javax.media.jai.FactoryCache.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+6
j  javax.media.jai.OperationRegistry.invokeFactory(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/Object;+57
j  javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/Object;+12
j  javax.media.jai.registry.RIFRegistry.create(Ljavax/media/jai/OperationRegistry;Ljava/lang/String;Ljava/awt/image/renderable/ParameterBlock;Ljava/awt/RenderingHints;)Ljava/awt/image/RenderedImage;+35
j  javax.media.jai.RenderedOp.createInstance(Z)Ljavax/media/jai/PlanarImage;+171
J  javax.media.jai.RenderedOp.createRendering()V
j  javax.media.jai.RenderedOp.getWidth()I+1
j  com.myapp.helpers.conversion.DocumentConverter.transformImage(Lcom/myapp/helpers/conversion/PageImage;Ljava/lang/String;Lcom/myapp/helpers/conversion/ImageSetting;)Ljava/util/List;+39
j  com.myapp.helpers.conversion.DocumentConverter.convertDocuments(Ljava/util/List;Ljava/lang/String;Lcom/myapp/helpers/conversion/ImageSetting;)Ljava/util/Map;+597
J  com.myapp.helpers.conversion.ConversionTask.run()V

```

So I have a few questions

1. What is (can be) exact cause of the problem?
2. Why does the error not occur all the time, same image gets converted successfully at times and fail at others?
3. How to solve (ofcourse :) ?