bytedeco/javacpp

Error Initial the OCR API

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#377 opened on Jan 9, 2020

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 (6 comments) (0 reactions) (0 assignees)Java (4,279 stars) (620 forks)batch import
bughelp wanted

Description

On some machines we are getting Error on Tesseract, This occures when creating new instance of TessBaseAPI()

java.util.concurrent.ExecutionException: java.lang.InternalError: Should not get here at java.util.concurrent.FutureTask.report(Unknown Source) at java.util.concurrent.FutureTask.get(Unknown Source) at javax.swing.SwingWorker.get(Unknown Source) at com.imviewer.worker.OCRTask.done(OCRTask.java:163) at javax.swing.SwingWorker$5.run(Unknown Source) at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(Unknown Source) at sun.swing.AccumulativeRunnable.run(Unknown Source) at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(Unknown Source) at javax.swing.Timer.fireActionPerformed(Unknown Source) at javax.swing.Timer$DoPostEvent.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$500(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Caused by: java.lang.InternalError: Should not get here at sun.nio.fs.WindowsNativeDispatcher.CreateSymbolicLink0(Native Method) at sun.nio.fs.WindowsNativeDispatcher.CreateSymbolicLink(Unknown Source) at sun.nio.fs.WindowsFileSystemProvider.createSymbolicLink(Unknown Source) at java.nio.file.Files.createSymbolicLink(Unknown Source) at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:1445) at org.bytedeco.javacpp.Loader.load(Loader.java:1143) at org.bytedeco.javacpp.Loader.load(Loader.java:1042) at org.bytedeco.tesseract.global.tesseract.<clinit>(tesseract.java:15) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at org.bytedeco.javacpp.Loader.load(Loader.java:1109) at org.bytedeco.javacpp.Loader.load(Loader.java:1042) at org.bytedeco.tesseract.TessBaseAPI.<clinit>(TessBaseAPI.java:25) at com.imviewer.worker.OCRTask$OCRChecker.<init>(OCRTask.java:182) at com.imviewer.worker.OCRTask.doInBackground(OCRTask.java:80) at javax.swing.SwingWorker$1.call(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at javax.swing.SwingWorker.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

Contributor guide

Tech stack
javacpp
Domain
toolingdesktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Java knowledgeWindows filesystem basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
The error occurs on Windows when creating a symbolic link in Loader.java at line 1445 (WindowsNativeDispatcher.CreateSymbolicLink0). Investigate alternatives to symbolic links on Windows (e.g., copy or hard link) and whether JavaCPP can provide a fallback. Check if the issue is related to missing permissions or Windows version. Review the Loader.java code around line 1445 to understand the context and propose a fix that handles the InternalError gracefully.