Getting Deeplearning4j exception

Question

I am getting the following exception at runtime using the latest Deeplearning4j release. The exception cause is listed below. I do not get the full trace so not sure which class it is not finding. I am not sure where the log can be found for that exception in hopes of seeing the full trace. It is not in my app server log. I am running using Java 1.8 using the Wildfly app server on Windows 10 prof.

Thanks for any help. -Tony

Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.nd4j.linalg.factory.Nd4j at org.deeplearning4j.util.ModelSerializer.restoreMultiLayerNetworkHelper(ModelSerializer.java:283) at org.deeplearning4j.util.ModelSerializer.restoreMultiLayerNetwork(ModelSerializer.java:238) at org.deeplearning4j.util.ModelSerializer.restoreMultiLayerNetwork(ModelSerializer.java:222) at org.deeplearning4j.util.ModelSerializer.restoreMultiLayerNetwork(ModelSerializer.java:380) at com.myuniportal.service.MyUniPortalMapMobileAIResource.(Unknown Source) at com.myuniportal.service.MapAIApplication.(Unknown Source) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at org.jboss.resteasy.core.ConstructorInjectorImpl.construct(ConstructorInjectorImpl.java:150) ... 36 more

Answer 1

I fixed this by copying dlls from jars to a folder pointed to in the path. I hope this answer helps others. -Tony

Answer 2

Deeplearning4j maintainer here. You should never need to do this and I hope folks don't actually do this in the future. Javacpp (underlying component for native components) manages all of this in a .javcpp folder and already handles this.

If you have to do something more than add the dependency to your pom.xml/gradle file, you likely did something wrong.

The jars already contain the dlls and load them automatically.

Answer 3

I solved the problem (with out unjaring dlls) and was able to get a program running in eclipse. I am working on getting a servlet to run right now

Again, many thanks.