heroku tomcatに展開されたJava Web WARのためのクラスが見つかりません

Question

このチュートリアルではhttps://devcenter.heroku.com/articles/java-webapp-runnerに続いて、いくつかの依存関係とWebアプリケーションのソースコード（サーブレット）を追加して、ファイルをロードする方法はinit()です。私はwebapp-runnerとmvn heroku:run-warの両方を使ってローカルでアプリをテストしました。サーブレットは期待通りに動作します。私はHerokuのにmvn heroku:deploy-warを使用してデプロイし、私は展開を終えた後のリンクに移動したときに、私は最初のリンクを開いたときにしかし、私は次のエラーを取得する：

HTTP Status 500 - Servlet.init() for servlet HelloWorld threw exception 

type Exception report 

message Servlet.init() for servlet HelloWorld threw exception 

description The server encountered an internal error that prevented it from fulfilling this request. 

exception 

javax.servlet.ServletException: Servlet.init() for servlet HelloWorld threw exception 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Thread.java:745) 

root cause 

java.lang.ExceptionInInitializerError 
    org.nd4j.nativeblas.NativeOpsHolder.<init>(NativeOpsHolder.java:16) 
    org.nd4j.nativeblas.NativeOpsHolder.<clinit>(NativeOpsHolder.java:9) 
    org.nd4j.linalg.cpu.nativecpu.ops.NativeOpExecutioner.<init>(NativeOpExecutioner.java:37) 
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
    java.lang.Class.newInstance(Class.java:442) 
    org.nd4j.linalg.factory.Nd4j.initWithBackend(Nd4j.java:5267) 
    org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5183) 
    org.nd4j.linalg.factory.Nd4j.<clinit>(Nd4j.java:167) 
    org.deeplearning4j.models.embeddings.loader.WordVectorSerializer.loadTxt(WordVectorSerializer.java:1578) 
    org.deeplearning4j.models.embeddings.loader.WordVectorSerializer.loadTxtVectors(WordVectorSerializer.java:1502) 
    herokutest.HelloWorld.init(HelloWorld.java:41) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Thread.java:745) 

root cause 

java.lang.RuntimeException: ND4J is probably missing dependencies. For more information, please refer to: http://nd4j.org/getstarted.html 
    org.nd4j.nativeblas.NativeOps.<clinit>(NativeOps.java:39) 
    org.nd4j.nativeblas.NativeOpsHolder.<init>(NativeOpsHolder.java:16) 
    org.nd4j.nativeblas.NativeOpsHolder.<clinit>(NativeOpsHolder.java:9) 
    org.nd4j.linalg.cpu.nativecpu.ops.NativeOpExecutioner.<init>(NativeOpExecutioner.java:37) 
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
    java.lang.Class.newInstance(Class.java:442) 
    org.nd4j.linalg.factory.Nd4j.initWithBackend(Nd4j.java:5267) 
    org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5183) 
    org.nd4j.linalg.factory.Nd4j.<clinit>(Nd4j.java:167) 
    org.deeplearning4j.models.embeddings.loader.WordVectorSerializer.loadTxt(WordVectorSerializer.java:1578) 
    org.deeplearning4j.models.embeddings.loader.WordVectorSerializer.loadTxtVectors(WordVectorSerializer.java:1502) 
    herokutest.HelloWorld.init(HelloWorld.java:41) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Thread.java:745) 

root cause 

java.lang.UnsatisfiedLinkError: no jnind4j in java.library.path 
    java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867) 
    java.lang.Runtime.loadLibrary0(Runtime.java:870) 
    java.lang.System.loadLibrary(System.java:1122) 
    org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:727) 
    org.bytedeco.javacpp.Loader.load(Loader.java:502) 
    org.nd4j.nativeblas.NativeOps.<clinit>(NativeOps.java:37) 
    org.nd4j.nativeblas.NativeOpsHolder.<init>(NativeOpsHolder.java:16) 
    org.nd4j.nativeblas.NativeOpsHolder.<clinit>(NativeOpsHolder.java:9) 
    org.nd4j.linalg.cpu.nativecpu.ops.NativeOpExecutioner.<init>(NativeOpExecutioner.java:37) 
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
    java.lang.Class.newInstance(Class.java:442) 
    org.nd4j.linalg.factory.Nd4j.initWithBackend(Nd4j.java:5267) 
    org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5183) 
    org.nd4j.linalg.factory.Nd4j.<clinit>(Nd4j.java:167) 
    org.deeplearning4j.models.embeddings.loader.WordVectorSerializer.loadTxt(WordVectorSerializer.java:1578) 
    org.deeplearning4j.models.embeddings.loader.WordVectorSerializer.loadTxtVectors(WordVectorSerializer.java:1502) 
    herokutest.HelloWorld.init(HelloWorld.java:41) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Thread.java:745) 

root cause 

java.lang.UnsatisfiedLinkError: no nd4j in java.library.path 
    java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867) 
    java.lang.Runtime.loadLibrary0(Runtime.java:870) 
    java.lang.System.loadLibrary(System.java:1122) 
    org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:727) 
    org.bytedeco.javacpp.Loader.load(Loader.java:493) 
    org.nd4j.nativeblas.NativeOps.<clinit>(NativeOps.java:37) 
    org.nd4j.nativeblas.NativeOpsHolder.<init>(NativeOpsHolder.java:16) 
    org.nd4j.nativeblas.NativeOpsHolder.<clinit>(NativeOpsHolder.java:9) 
    org.nd4j.linalg.cpu.nativecpu.ops.NativeOpExecutioner.<init>(NativeOpExecutioner.java:37) 
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
    java.lang.Class.newInstance(Class.java:442) 
    org.nd4j.linalg.factory.Nd4j.initWithBackend(Nd4j.java:5267) 
    org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5183) 
    org.nd4j.linalg.factory.Nd4j.<clinit>(Nd4j.java:167) 
    org.deeplearning4j.models.embeddings.loader.WordVectorSerializer.loadTxt(WordVectorSerializer.java:1578) 
    org.deeplearning4j.models.embeddings.loader.WordVectorSerializer.loadTxtVectors(WordVectorSerializer.java:1502) 
    herokutest.HelloWorld.init(HelloWorld.java:41) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Thread.java:745) 

Procfile

web: java $JAVA_OPTS -jar target/dependency/webapp-runner.jar --port $PORT target/*.war 

だから、のpom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>org.tomcat.heroku</groupId> 
    <artifactId>heroku-tomcat</artifactId> 
    <packaging>war</packaging> 
    <version>1.0-SNAPSHOT</version> 
    <name>heroku-tomcat Maven Webapp</name> 
    <url>http://maven.apache.org</url> 


    <properties> 
    <nd4j.version>0.6.0</nd4j.version> 
    <dl4j.version>0.6.0</dl4j.version> 
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    </properties> 


    <dependencies> 
    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>3.8.1</version> 
     <scope>test</scope> 
    </dependency> 

    <dependency> 
     <groupId>org.deeplearning4j</groupId> 
     <artifactId>deeplearning4j-ui</artifactId> 
     <version>${dl4j.version}</version> 
    </dependency> 

    <dependency> 
     <groupId>org.deeplearning4j</groupId> 
     <artifactId>deeplearning4j-nlp</artifactId> 
     <version>${dl4j.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.nd4j</groupId> 
     <artifactId>nd4j-native</artifactId> 
     <version>${nd4j.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.nd4j</groupId> 
     <artifactId>nd4j-common</artifactId> 
     <version>${nd4j.version}</version> 
    </dependency> 

    <dependency> 
     <groupId>javax.servlet</groupId> 
     <artifactId>jstl</artifactId> 
     <version>1.2</version> 
    </dependency> 



    </dependencies> 


    <build> 
    <finalName>heroku-tomcat</finalName> 
    <plugins> 

     <plugin> 
      <groupId>com.heroku.sdk</groupId> 
      <artifactId>heroku-maven-plugin</artifactId> 
      <version>1.1.1</version> 
     </plugin> 

     <plugin> 
     <groupId>org.apache.maven.plugins</groupId> 
     <artifactId>maven-dependency-plugin</artifactId> 
     <version>2.3</version> 
     <executions> 
      <execution> 
      <phase>package</phase> 
      <goals><goal>copy</goal></goals> 
      <configuration> 
       <artifactItems> 
       <artifactItem> 
        <groupId>com.github.jsimone</groupId> 
        <artifactId>webapp-runner</artifactId> 
        <version>8.0.30.2</version> 
        <destFileName>webapp-runner.jar</destFileName> 
       </artifactItem> 
       </artifactItems> 
      </configuration> 
      </execution> 
     </executions> 
     </plugin> 
    </plugins> 
    </build> 


</project> 

urceコード：

package herokutest; 

import org.apache.commons.lang.math.NumberUtils; 
import org.bytedeco.javacpp.presets.opencv_core; 
import org.deeplearning4j.models.embeddings.loader.WordVectorSerializer; 
import org.deeplearning4j.models.embeddings.wordvectors.WordVectors; 

import javax.servlet.ServletConfig; 
import javax.servlet.ServletContext; 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.IOException; 
import java.io.UnsupportedEncodingException; 
import java.util.Arrays; 
import java.util.Collection; 

/** 
* Created by Mr_RexZ on 10/23/2016. 
*/ 
public class HelloWorld extends HttpServlet { 

    private String message; 
    String loc="/WEB-INF/glove.6B.50d.txt"; 


    @javax.ws.rs.core.Context 
    ServletContext context; 
    WordVectors wordVectors; 

    public void init(final ServletConfig config) throws ServletException 
    { 
     message = "Hi"; 

     String fullPath = config.getServletContext().getRealPath(loc); 
     File file = new File(fullPath); 
     try { 
      wordVectors = WordVectorSerializer.loadTxtVectors(file); 
     } catch (FileNotFoundException e) { 
      e.printStackTrace(); 
     } catch (UnsupportedEncodingException e) { 
      e.printStackTrace(); 
     } 
    } 

    public void doGet(HttpServletRequest request, 
         HttpServletResponse response) 
      throws ServletException, IOException 
    { 

     response.setContentType("text/html"); 

     boolean submitSim = request.getParameter("submitSim") != null; 
     boolean submitAn = request.getParameter("submitAn") != null; 


     String findSim = request.getParameter("findSim"); 
     request.setAttribute("findSim", findSim); 

     String resSim = request.getParameter("resSim"); 
     request.setAttribute("resSim", resSim); 
     if (request.getParameter("numSim")!=null && NumberUtils.isNumber(request.getParameter("numSim"))) { 
      int numSim = Integer.parseInt(request.getParameter("numSim")); 
      request.setAttribute("numSim", request.getParameter("numSim")); 

     if(submitSim) { 
      Collection<String> lst = wordVectors.wordsNearest(findSim, numSim); 
      request.setAttribute("resSim", Arrays.toString(lst.toArray())); 
     } 

     } 
     String an1 = request.getParameter("an1"); 
     String an2 = request.getParameter("an2"); 
     String an3 = request.getParameter("an3"); 
     request.setAttribute("an1", an1); 
     request.setAttribute("an2", an2); 
     request.setAttribute("an3", an3); 

     String resAn = request.getParameter("resAn"); 
     request.setAttribute("resAn", resAn); 

     if (request.getParameter("numAn")!=null && NumberUtils.isNumber(request.getParameter("numAn"))) { 
      int numAn = Integer.parseInt(request.getParameter("numAn")); 
      request.setAttribute("numAn", request.getParameter("numAn")); 

     if (submitAn) { 
      Collection<String> lst = wordVectors.wordsNearest(Arrays.asList(new String[] {an2,an3}) , Arrays.asList(new String[] {an1}),numAn); 
      request.setAttribute("resAn", Arrays.toString(lst.toArray())); 
     } 
     } 
     request.getRequestDispatcher("/index.jsp").forward(request, response); 
    } 


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
     doGet(request,response); 
    } 

    public void destroy() 
    { 
     // do nothing. 
    } 
} 

しかし

、私は追加の依存関係を削除すると、ウェブアプリは がローカルアプリが動作するかどうかをテストするweb-app runnerを使ってアプリをテストし、私の理解に..動作するかどうかを確認するのに十分であること実行時の問題を防ぐので、Herokuにデプロイされたときにも機能します。しかし、私はそれがなぜ依存関係が追加された場合にはうまくいかないのか分からないのですか？

Answer 1

根本的な問題は、実際にはnd4jのC++コードに関連しています。私は、あなたがすでにnd4jバックエンド（http://nd4j.org/backend.html）に比較的精通していなければならないという訓練モデルをすでに持っていると仮定しています。その場合、nd4jのネイティブ・プラットフォームに最新のバージョンのnd4jをクラスパスに追加してください。

Nd4jネイティブプラットフォームは、さまざまなプラットフォーム用のすべてのネイティブライブラリをバンドルします。

これは何らかの理由で動作しない場合は、分類器のルートに行くことができます。

これを読む： What is the purpose of Classifier tag in maven?

あなたはここに表示されます： http://repo1.maven.org/maven2/org/nd4j/nd4j-native/0.6.0/

ルックをjarファイルの名前で、あなたはnd4j、ネイティブ・ここではいくつかのCLASSIFIER

が表示されます

あなたがLinuxにデプロイしているので、あなたはおそらく望んでいるでしょう： linux-x86_64.jar

これはOS-CHIP_ARCHITECTUREで、mac、windows、powerpc、androidも表示されます。

この権利は、0.6.0です。

dl4jの例は、常に最新のバージョンである：github.com/deeplearning4j/dl4j-examples