SIGSEGV Error when using libtessract4.0.0.so in Pega Application

[MadhuSudan Kaka]

Hi,

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 every time I run the Java Program. Appreciate if someone can provide guidance to resolve this issue.

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). 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/