Hi Quan, I am trying to use tess4j in my Pega Application which is running on Linux Ubuntu and getting a Fatal error that is restarting the server everytime I run the Java Program.
I imported tess4j 5.4.0.jar in my Pega application and its supporting jars (details are shared below). I copied the native libraries (.dll) to a folder on my server (azure mount) and tessdata folder with eng.traineddata. Also, defined these locations in Java path of yaml file in Pega. Initially, I was getting this error (NoClassDefFoundError: Could not initialize class net.sourceforge.tess4j.TessAPI <https://stackoverflow.com/questions/35012873/tess4j-error-after-distributing-as-war-noclassdeffounderror-could-not-initializ>). So, I downloaded a .so file (libtessract4.0.0.so) from web and added it to the native library folder. In my Java code, I initialized the tesseract object, set the JNA path, TessData Path invoked doOCR() on a Image. I am getting below error when I call tesseract.doOCR() in my code. *Here are the server logs:* 07-Mar-2025 20:58:12.967 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.Native.extractFromResourcePath Looking in classpath from com.pega.pegarules.bootstrap.loader.PRAppLoader@2b7e8044 for /com/sun/jna/linux-x86-64/libjnidispatch.so 07-Mar-2025 20:58:13.053 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.Native.extractFromResourcePath Found library resource at pegajdbc://408132785:0/jna-5.8.0.jar!/com/sun/jna/linux-x86-64/libjnidispatch.so 07-Mar-2025 20:58:13.149 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.Native.extractFromResourcePath Extracting library to /usr/local/tomcat/temp/jna14459296195516564982.tmp 07-Mar-2025 20:58:13.150 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.Native.loadNativeDispatchLibraryFromClasspath Trying /usr/local/tomcat/temp/jna14459296195516564982.tmp 07-Mar-2025 20:58:13.157 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.Native.loadNativeDispatchLibraryFromClasspath Found jnidispatch at /usr/local/tomcat/temp/jna14459296195516564982.tmp 07-Mar-2025 20:58:13.867 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.NativeLibrary.loadLibrary Looking for library 'tesseract' 07-Mar-2025 20:58:13.867 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.NativeLibrary.loadLibrary Adding paths from jna.library.path: /mnt/BCDS/outbound/tess4j/linux-x86-64/ 07-Mar-2025 20:58:13.911 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.NativeLibrary.loadLibrary Trying /mnt/BCDS/outbound/tess4j/linux-x86-64/libtesseract.so 07-Mar-2025 20:58:14.255 INFO [https-jsse-nio-8443-exec-2] com.sun.jna.NativeLibrary.loadLibrary Found library 'tesseract' at /mnt/BCDS/outbound/tess4j/linux-x86-64/libtesseract.so !strcmp(locale, "C"):Error:Assert failed:in file /mnt/c/nix/Dev/cpp/lib/tesseract/src/api/baseapi.cpp, line 209 # # A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x00007f63e0bff898, pid=1, tid=523 # # JRE version: OpenJDK Runtime Environment Temurin-11.0.21+9 (11.0.21+9) (build 11.0.21+9) # Java VM: OpenJDK 64-Bit Server VM Temurin-11.0.21+9 (11.0.21+9, mixed mode, tiered, compressed oops, serial gc, linux-amd64) # Problematic frame: # C [libc.so.6+0x28898] abort+0x178 # # Core dump will be written. Default location: //core.1 # # An error report file with more information is saved as: # /tmp/hs_err_pid1.log # # If you would like to submit a bug report, please visit: # https://github.com/adoptium/adoptium-support/issues # The crash happened outside the Java Virtual Machine in native code. # See problematic frame for where to report the bug. *Jar files imported in Pega application: * tess4j-5.4.0.jar jna-5.8.0.jar jna-platform-5.8.0.jar slf4j-api-1.7.30.jar slf4j-simple-1.7.30.jar lept4j-1.16.2.jar commons-io-2.6.jar And copied the jar files to azure mount location (/mnt/BCDS/outbound/) on server *Java Paths:* -Djna.library.path=/mnt/BCDS/outbound/tess4j/linux-x86-64/ -Dtessdata.path=/mnt/BCDS/outbound/tess4j/tessdata/ On Sunday, 29 April 2012 at 12:02:59 UTC-4 Quan Nguyen wrote: > Armed with Ant and JUnit, you can execute "ant test" command to validate > the program. > > BTW, more test cases have been added in latest update. > > On Saturday, April 28, 2012 10:32:30 PM UTC-5, FCC wrote: >> >> Hi Quan, >> >> I am new bee to this tess4j stuff. I have downloaded the source from >> https://sourceforge.net/projects/tess4j/ testing it from eclipse.when i >> ran the sample app >> >> public static void main(String[] args) { >> File imageFile = new >> File("C:\\tesseract-ocr\\JNA\\Tess4J\\eurotext.png"); >> //File imageFile = new File("C:\\tesseract-ocr\\H1B.jpg"); >> >> Tesseract instance = Tesseract.getInstance(); // JNA Interface >> Mapping >> // Tesseract1 instance = new Tesseract1(); // JNA Direct Mapping >> >> try { >> String result = instance.doOCR(imageFile); >> System.out.println(result); >> } catch (TesseractException e) { >> System.err.println(e.getMessage()); >> }catch (Exception ex) { >> System.err.println(ex.getMessage()); >> } >> } >> >> >> When i followed the instruction i got the following error. I am more >> into Java but not on to the c++ side to figure out the issue. Please let me >> know, how to resolve this. >> >> >> # >> # A fatal error has been detected by the Java Runtime Environment: >> # >> # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x173c0fe9, pid=8136, >> tid=4576 >> # >> # JRE version: 6.0_30-b12 >> # Java VM: Java HotSpot(TM) Client VM (20.5-b03 mixed mode windows-x86 ) >> # Problematic frame: >> # C [libtesseract302.dll+0x70fe9] >> # >> # An error report file with more information is saved as: >> # C:\SAS2.0\Tess4Java\hs_err_pid8136.log >> # >> # If you would like to submit a bug report, please visit: >> # http://java.sun.com/webapps/bugreport/crash.jsp >> # The crash happened outside the Java Virtual Machine in native code. >> # See problematic frame for where to report the bug. >> >> Could you please let me know, where i am going wrong. Thanks! >> >> Regards, >> Kamal. >> >> >> On Sunday, August 22, 2010 10:35:26 PM UTC-4, Quan Nguyen wrote: >>> >>> A JNA-based wrapper for Tesseract OCR DLL, the library provides >>> optical character recognition (OCR) support for: >>> >>> * TIFF, JPEG, GIF, PNG, and BMP image formats >>> * Multi-page TIFF images >>> * PDF document format >>> >>> http://tess4j.sf.net >> >> -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/tesseract-ocr/2c8bb818-8211-402d-8669-60e71e7f4e94n%40googlegroups.com.
