ErrorInInitializerError - zip file closed out of tess4j.util.LoadLibs.getTesseractLibName

[Ralph Cook]

I am running a Java desktop application on Windows 10 Pro using Tess4j; it was working fine with Java 1.8, am now trying to get it to run with Java 11 (11.0.15.1). When it calls net.sourceforge.tess4j.Tesseract.doOCR(BufferedImage bi), it gets a Throwable ExceptionInInitializerError, with a 'cause' exception indicating a call to net.sourceforge.tess4j.util.LoadLibs.getTesseractLibName().

Oddly enough, the application works fine from within eclipse, but fails running on its own (for instance, running "java -jar program.jar" from a cmd window). As I said, it was running with Java 1.8, and I might be able to get it running again by uninstalling Java and reinstalling that JRE, but there are other people that are going to use the application and it is not reasonable to expect them to use a Java version that is that old. 

I had the Maven dependency:

        <groupId>net.sourceforge.tess4j</groupId>
        <artifactId>tess4j</artifactId>
        <version>4.4.1</version>

The only copy of tess4j-4.1.1.jar on my hard drive is in my .m2\repository\net\sourceforge\tess4j\tess4j\4.4.1. I have twice deleted it and updated my maven configuration to restore it, to insure it is not corrupted.

I noticed that this is not the most recent Tess4j, so updated the dependency to 5.4.0 and rebuilt. This has the same results: works in eclipse, not from command line.

The ExceptionInInitializerError is caused by an IllegalStateException: zip file closed error. Documentation indicates this could be a corrupted jar file or something similar. I don't know what jar file could be involved except the tess4j, and I've replaced that twice as I've said.

I've also tried this with two versions of the Tesseract-OCR dll -- 5.0.1.20220118 and v5.2.0.20220712; they were both installed for "anyone on this computer" with default options. They give the same results.

Can someone help me figure out what's wrong?

Stack trace:

java.lang.ExceptionInInitializerError
        at net.sourceforge.tess4j.Tesseract.init(Tesseract.java:427)
        at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:311)
        at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:294)
        at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:275)
        at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:259)
        at drivingrecordtool.file.DrivingRecordPDFTextReader.getOCRText(DrivingRecordPDFTextReader.java:152)
        at drivingrecordtool.file.DrivingRecordPDFTextReader.getText(DrivingRecordPDFTextReader.java:46)
        at drivingrecordtool.file.DrivingRecordFileReader.doInBackground(DrivingRecordFileReader.java:78)
        at drivingrecordtool.file.DrivingRecordFileReader.doInBackground(DrivingRecordFileReader.java:1)
        at java.desktop/javax.swing.SwingWorker$1.call(SwingWorker.java:304)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at java.desktop/javax.swing.SwingWorker.run(SwingWorker.java:343)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.IllegalStateException: zip file closed
        at java.base/java.util.zip.ZipFile.ensureOpen(ZipFile.java:913)
        at java.base/java.util.zip.ZipFile.getEntry(ZipFile.java:348)
        at java.base/java.util.zip.ZipFile$1.getEntry(ZipFile.java:1130)
        at java.base/java.util.jar.JarFile.getEntry0(JarFile.java:586)
        at java.base/java.util.jar.JarFile.getEntry(JarFile.java:516)
        at java.base/sun.net.www.protocol.jar.URLJarFile.getEntry(URLJarFile.java:131)
        at java.base/java.util.jar.JarFile.getJarEntry(JarFile.java:478)
        at java.base/jdk.internal.loader.URLClassPath$JarLoader.getResource(URLClassPath.java:945)
        at java.base/jdk.internal.loader.URLClassPath.getResource(URLClassPath.java:315)
        at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:455)
        at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452)
        at java.base/java.security.AccessController.doPrivileged(Native Method)
        at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        at net.sourceforge.tess4j.util.LoadLibs.getTesseractLibName(LoadLibs.java:95)
        at net.sourceforge.tess4j.util.LoadLibs.getTessAPIInstance(LoadLibs.java:85)
        at net.sourceforge.tess4j.TessAPI.<clinit>(TessAPI.java:42)
        ... 15 more

[Quan Nguyen]

You may want to try VietOCR, a Java desktop app that uses Tess4J. It works with Java 8, 18, and probably 11 too.

http://vietocr.sf.net

[Ralph Cook]

How is this supposed to help me? I have a program using the Tesseract library to do OCR and then process the resulting text; I don't need a GUI front end.

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[Quan Nguyen]

You try the suggested program to see if the same exception occurs. If it does not, then it's possible that something in your code is not right. VietOCR is open source; you can browse through the code to see how it works.

Another suggestion: try to use the alternate Tesseract1 API.