Hi all, I'm using PDFBox 2.0.7 to extract pages from PDFs, convert them to images and stream them back out.
I have included <dependency> <groupId>com.levigo.jbig2</groupId> <artifactId>levigo-jbig2-imageio</artifactId> <version>1.6.5</version> </dependency> <dependency> <groupId>com.github.jai-imageio</groupId> <artifactId>jai-imageio-core</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>com.github.jai-imageio</groupId> <artifactId>jai-imageio-jpeg2000</artifactId> <version>1.3.0</version> </dependency> I can fire up tomcat and everything works fine... The next day at some point I get ERROR 15:11:13,114 [http-nio-8080-exec-1 PDFStreamEngine] - Cannot read JPEG2000 image: Java Advanced Imaging (JAI) Image I/O Tools are not installed which boggles my mind! They were just there. How could they disappear? Of course, after a restart everything is fine again-- until next time. Disk space is fine. RAM is fine. Swap is fine. Nothing else seems adversely affected. The way I see it working is: org.apache.pdfbox.filter.JPXFilter#readJPX calls org.apache.pdfbox.filter.Filter#findImageReader and that then iterates over an ImageReader collection provided by javax.imageio.ImageIO#getImageReadersByFormatName ... That collection is contained in a singleton IIORegistry obtained from javax.imageio.spi.IIORegistry#getDefaultInstance. When that IIORegistry is constructed, it walks the classpath looking for service provider instances in javax.imageio.spi.IIORegistry#registerApplicationClasspathSpis ... It obviously finds the JPEG2000 SPI early on, but then forgets it later. I can't see how that would be possible, or how to remedy it! Please help! Thanks so much, CG
