Issue running tensorflow with java

Question

I am having some issues running tensorflow with java. I am using CUDA 8 with CuDNN 6.

I tried following the quickstart instructions located here: https://www.tensorflow.org/install/install_java and get the following error message when I attempt to run the example java program:

java -cp libtensorflow-1.4.0.jar:. -Djava.library.path=./jni HelloTF

Exception in thread "main" java.lang.UnsatisfiedLinkError: Cannot find TensorFlow native library for OS: linux, architecture: x86_64. See https://github.com/tensorflow/tensorflow/tree/master/tensorflow/java/README.md for possible solutions (such as building the library from source). Additional information on attempts to find the native library can be obtained by adding org.tensorflow.NativeLibrary.DEBUG=1 to the system properties of the JVM.
    at org.tensorflow.NativeLibrary.load(NativeLibrary.java:75)
    at org.tensorflow.TensorFlow.init(TensorFlow.java:66)
    at org.tensorflow.TensorFlow.<clinit>(TensorFlow.java:70)
    at org.tensorflow.Graph.<clinit>(Graph.java:258)
    at HelloTF.main(HelloTF.java:8)

The jni directory contains the following:

• libtensorflow_framework.so
• libtensorflow_jni.so
• LICENSE

I then tried installing the binaries from source as suggested here: https://github.com/tensorflow/tensorflow/blob/master/tensorflow/java/README.md

This is the output from setting: org.tensorflow.NativeLibrary.DEBUG=1

org.tensorflow.NativeLibrary: tryLoadLibraryFailed: /path/to/jni/libtensorflow_jni.so: libcublas.so.8.0: cannot open shared object file: No such file or directory
org.tensorflow.NativeLibrary: jniResourceName: org/tensorflow/native/linux-x86_64/libtensorflow_jni.so
org.tensorflow.NativeLibrary: frameworkResourceName: org/tensorflow/native/linux-x86_64/libtensorflow_framework.so

But I still get the same error message when I try and run the example Java program.

What am I doing wrong??

Any help would be greatly appreciated!

Answer 1

When people (like myself) come from python to java world, everything is strange! here is how I solved my problem regarding all linking errors: I assumed you already have simple hello Tensorflow project, explained here

1. Download and copy tensorflow JNI files to :/usr/lib/tensorflow

2. Download and copy desired version of tensorflow Lib jar file to: /usr/lib/tensorflow

   Compile with java

3. Compile java file

javac -cp /usr/lib/tensorflow/libtensorflow-1.14.0.jar HelloTensorFlow.java

4. run java file:

java -cp /usr/lib/tensorflow/libtensorflow-1.14.0.jar:. -Djava.library.path=/usr/lib/tensorflow/ HelloTensorFlow

use MAVEN

1. First we should export LD_LIBRARY_PATH:

export LD_LIBRARY_PATH=/usr/lib/tensorflow

2. Then run maven build command:

mvn -q compile exec:java

I hope it helps you

Answer 2

For those landing here and facing the same issue.

You are probably trying to run your program from eclipse. Then, you have to go to Run configurations > Arguments and pass this arguments:

• Program arguments -> models/ images/example-400x288.jpg

• VM Arguments -> -Djava.library.path=./jni

like in this screenshot:

Answer 3

The error

Cannot find TensorFlow native library for OS: linux, architecture: x86_64.

is clearly stating that the library is not visible to your software.

To make it available to the Java class, try doing like that (in the same shell obviously):

export LD_LIBRARY_PATH=/the/absolute/path/to/your/library
java -cp libtensorflow-1.4.0.jar:. -Djava.library.path=./jni HelloTF

also ensure you're running the java command from the same directory which contains the /jni directory.