UnsatisfiedLinkError; thrown while initializing Lcom/googlecode/tesseract/android/TessBaseAPI 'libjpgt.so' and 'liblept.so' w/ compile 'com.rmtheis:tess-two:6.0.0'

[seantibb]

Hey team awesome! I found an issue tonight that I can't seem to find a workaround for. I updated my application to call tess-two 6.0.0 from tess-two 5.4.1 and started getting the error below about being unable to load libjpgt.so and liblept.so. I reverted back to 5.4.1 and do not get the same error.

This is an app targeting Ice Cream Sandwich (min SDK 15) for an older device.

Any suggestions?

Stacktrace:

06-05 23:03:15.565 29589-29589/[redacted] D/dalvikvm: Trying to load lib /data/data/[redacted for security]/lib/liblept.so 0x4103ca50 06-05 23:03:15.565 29589-29589/[redacted] W/dalvikvm: Exception Ljava/lang/UnsatisfiedLinkError; thrown while initializing Lcom/googlecode/tesseract/android/TessBaseAPI; 06-05 23:03:15.565 29589-29589/[redacted] D/AndroidRuntime: Shutting down VM 06-05 23:03:15.565 29589-29589/[redacted] W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x40abb1f8) 06-05 23:03:15.573 29589-29589/[redacted] E/AndroidRuntime: FATAL EXCEPTION: main java.lang.ExceptionInInitializerError at [redacted].MainActivity.doOCR(MainActivity.java:561) at [redacted].MainActivity.onPictureTaken(MainActivity.java:417) at android.hardware.Camera$EventHandler.handleMessage(Camera.java:689) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4424) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.UnsatisfiedLinkError: Cannot load library: link_image[1936]: 104 could not load needed library 'libjpgt.so' for 'liblept.so' (load_library[1091]: Library 'libjpgt.so' not found) at java.lang.Runtime.loadLibrary(Runtime.java:370) at java.lang.System.loadLibrary(System.java:538) at com.googlecode.tesseract.android.TessBaseAPI.<clinit>(TessBaseAPI.java:44) at [redacted].MainActivity.doOCR(MainActivity.java:561) at [redacted].MainActivity.onPictureTaken(MainActivity.java:417) at android.hardware.Camera$EventHandler.handleMessage(Camera.java:689) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4424) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native Method)

[rmtheis]

Did you try doing a clean or File->Invalidate Caches and Restart?

[rmtheis]

What happens when you go to run the test cases?

Please reopen this issue with more complete instructions on how to reproduce the problem.

[seantibb]

Steps to reproduce the error:

Run a functioning app using app/build.grade with:

compile 'com.rmtheis:tess-two:5.4.1'

Everything works fine

Update app/build.gradle to:
compile 'com.rmtheis:tess-two:6.0.1'

On the line of your code that calls "new TessBaseAPI()" error will be thrown.

Change app/build.gradle back to
compile 'com.rmtheis:tess-two:5.4.1'
and all is fine.

To try and resolve, I 1) invalidated caches and restarted, 2) ran clean build, 3) compiled and installed app on device.

Code to reproduce:

public static TessBaseAPI gTess = null;
if (getTess() == null) {
setTess(new TessBaseAPI());
}
public static synchronized void setTess(TessBaseAPI newTess) {
gTess = newTess;
}

Also, I tried finding the test cases, but since I am calling it from the build.gradle instead of downloading the source and importing as a module, I do not have the test cases available that I can find.

Thanks!

[rmtheis]

Is your minSdkVersion at least 9?

[seantibb]

here's that piece of my app/build.gradle:

    minSdkVersion 15
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.rmtheis:tess-two:5.4.1'
compile project( ':libraries:opencv' )
}

5.4.1 works great, as soon as I change that to 6.0.1 I get the link error.

[rmtheis]

After you change to 6.0.1, and you choose "Sync Now", do you get BUILD SUCCESSFUL?

[seantibb]

I do. Everything appears fine in Android Studio. It's not until I actually run the app that it crashes.

[rmtheis]

If you unzip your APK and look in its libs folder, do you see four *.so files available in each subfolder?

[seantibb]

Yup, they're all there. Really strange :/

[rmtheis]

Hmm... does it still happen if you remove OpenCV, or otherwise try a simplified version of your app?

[seantibb]

Yup. The only change is that compile line in the build.gradle

[rmtheis]

What I mean is that you should try removing unrelated parts of your app to narrow down what's causing the problem. I suspect the problem is somehow related to your setup or your code. For example, I can make this same change on my android-ocr project without hitting this error.

Are you able to create a simplified/minimal example that you can share on Github that demonstrates the problem?

[rmtheis]

Also see #127.

[lhb2]

with compile 'com.rmtheis:tess-two:6.0.1', I have same problem at Galaxy Nexus(4.2.2),but no problem at other device.
I think this is a bug.

[rmtheis]

@seantibb @guoyong0423 which version of Android are you running on when you see this error?

[seantibb]

@rmtheis API 15 here...Ice Cream Sandwich

[lhb2]

the error reappeared at another device(4.1.2)

[giniedp]

same here.
Library works fine in version 5.4.1
Switching to 6.0.2 sopts working on a HTC One V with Android 4.1.2 (cyanogen mod)

minSdkVersion 16
targetSdkVersion 23

Caused by: java.lang.UnsatisfiedLinkError: Cannot load library: link_image[1916]:  1486 could not load needed library 'libjpgt.so' for 'liblept.so' (load_library[1118]: Library 'libjpgt.so' not found)
at java.lang.Runtime.loadLibrary(Runtime.java:370)
at java.lang.System.loadLibrary(System.java:535)
at com.googlecode.tesseract.android.TessBaseAPI.<clinit>(TessBaseAPI.java:44)

6.0.2 works fine on

• Nexus 6 Android 6.0.1
• Samsung Galaxy 4 Android 5.0.1
• HTC One Mini Android 4.4.2

6.0.2 stopped working on

• HTC One V Android 4.1.2 (cyanogen mod)
• Nexus 7 Android 4.1.2

[rmtheis]

It looks to me like this is a bug that occurs on devices running Android versions prior to 4.4 (KitKat). I don't think it's directly fixable from this project, but there are some options for a workaround:

1. Remove libjpeg
2. Support pre-KitKat Android by providing a new constructor TessBaseAPI(Context) that uses Relinker to work around the library loading problem
3. Do a bug-fix 5.4.2 release and drop support for pre-KitKat Android going forward

[rmtheis]

Also worth trying would be explicitly loading libjpeg, with the libraries in this order:

System.loadLibrary("jpgt");
System.loadLibrary("lept");
System.loadLibrary("tess");

[lhb2]

Thank you very match!
It works fine when I add this code in my class:
static{
System.loadLibrary("jpgt");
System.loadLibrary("pngt");
System.loadLibrary("lept");
System.loadLibrary("tess");
}

[aneeshATgithub]

can u please help me??
#169

[parulsngh]

Its working fine for initial few api calls but getHOCRText() method responding very slow after continuous usage. The image I am passing for scanning is binarized image.
Is their any limit for api hits in a single day? Can't figure out the issue, plz help.