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https://issues.apache.org/jira/browse/PDFBOX-4671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16952971#comment-16952971
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Tilman Hausherr commented on PDFBOX-4671:
-----------------------------------------
I don't know if we can help you with that one. What happens if you have the
servlet use the JBIG2 decoder directly with some dummy operation so that it is
loaded when the servlet starts?
> NoClassDefFoundError: Could not initialize class
> org.apache.pdfbox.jbig2.JBIG2ImageReader
> -----------------------------------------------------------------------------------------
>
> Key: PDFBOX-4671
> URL: https://issues.apache.org/jira/browse/PDFBOX-4671
> Project: PDFBox
> Issue Type: Bug
> Components: JBIG2
> Affects Versions: 3.0.2 JBIG2
> Reporter: Luis Panadero Guardeño
> Priority: Major
>
> JBIG2 ImageIO plugin sometimes does a NoClassDefFoundError
> I'm using TwelveMonkeys IIOProviderContextListener to fix the problem of
> ImageIO with servlets, and additionally doing a
> {{ImageIO}}.{{scanForPlugins}}(). But this keeps happening randomly. Any idea
> where could be the problem ?
> This is happening with Tomcat 7 running over Oracle Java 8 (latest version)
>
> {code:java}
> java.lang.NoClassDefFoundError: Could not initialize class
> org.apache.pdfbox.jbig2.JBIG2ImageReader
> at
> org.apache.pdfbox.jbig2.JBIG2ImageReaderSpi.createReaderInstance(JBIG2ImageReaderSpi.java:117)
> at
> javax.imageio.spi.ImageReaderSpi.createReaderInstance(ImageReaderSpi.java:320)
> at javax.imageio.ImageIO$ImageReaderIterator.next(ImageIO.java:529)
> at javax.imageio.ImageIO$ImageReaderIterator.next(ImageIO.java:513)
> at org.apache.pdfbox.filter.Filter.findImageReader(Filter.java:155)
> at org.apache.pdfbox.filter.JBIG2Filter.decode(JBIG2Filter.java:67)
> at org.apache.pdfbox.cos.COSInputStream.create(COSInputStream.java:84)
> at org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:175)
> at
> org.apache.pdfbox.pdmodel.common.PDStream.createInputStream(PDStream.java:241)
> at
> org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.createInputStream(PDImageXObject.java:735)
> at
> org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.from1Bit(SampledImageReader.java:253)
> at
> org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.getRGBImage(SampledImageReader.java:212)
> at
> org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.getImage(PDImageXObject.java:444)
> at
> org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.getImage(PDImageXObject.java:425)
> at org.apache.pdfbox.rendering.PageDrawer.drawImage(PageDrawer.java:1100)
> at
> org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:63)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:869)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:505)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:479)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:152)
> at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:263)
> at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:321)
> at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:243)
> at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:203)
> at
> com.digibis.digiimage.pdf.pdfbox.PdfBoxPdfProcessor.getImageFromDocumentPage(PdfBoxPdfProcessor.java:105){code}
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