NoSuchMethodError：Firebaseをアプリエンジンアプリと統合中

Question

私はfirebaseリアルタイムデータベースをGoogleアプリエンジンアプリと統合しようとしていました。スタックトレースは、これと同じ問題は、人々はグアバ20.0にグアバ19.0にアップグレードすることが示唆多くのフォーラムで議論されてきた

03:21:01.450 Error for /productSync java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkState(ZLjava/lang/String;Ljava/lang/Object;)V at com.google.firebase.FirebaseApp.checkNotDeleted(FirebaseApp.java:314) at com.google.firebase.FirebaseApp.getOptions(FirebaseApp.java:260) at com.google.firebase.database.FirebaseDatabase.getInstance(FirebaseDatabase.java:80) at in.prago.servlet.ProductDataSync.doGet(ProductDataSync.java:83) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:37) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:257) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:145) at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchServletRequest(JavaRuntime.java:644) at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchRequest(JavaRuntime.java:604) at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:574) at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:453) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:460) at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:293) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:319) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:311) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:457) at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:238) at java.lang.Thread.run(Thread.java:745)

ある

> DatabaseReference ref = FirebaseDatabase 
>     .getInstance() 
>     .getReference("todoItems"); 

を呼び出すときに、私はこのエラーを取得しました。私の場合、私はそのようなライブラリを使用していないので、私は両方を追加しようとしましたが、それは私のために働いていませんでした。毎回同じエラーがありました。私はまた、誰かがそれを見る必要がある場合に備えて、pom.xmlファイルを追加しています。どんな助けもありがとう。 Auberonで示唆したように、私は客観5.1.17の新バージョンで私のpom.xmlを更新し、グアバを削除

：ここ

は、そのようなフォーラムへのリンクhttps://github.com/google/guava/issues/2380

<?xml version="1.0" encoding="UTF-8"?> 
<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/xsd/maven-4.0.0.xsd"> 

    <modelVersion>4.0.0</modelVersion> 
    <packaging>war</packaging> 
    <version>1.0</version> 


    <properties> 
     <appengine.app.version>1</appengine.app.version> 
     <appengine.target.version>1.9.53</appengine.target.version> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    </properties> 

    <dependencies> 

    <dependency> 
    <groupId>com.google.firebase</groupId> 
    <artifactId>firebase-admin</artifactId> 
    <version>5.0.0</version> 
</dependency> 

<dependency> 
     <groupId>com.google.guava</groupId> 
     <artifactId>guava</artifactId> 
     <version>20.0</version> 
    </dependency> 

     <!-- Compile/runtime dependencies --> 
     <dependency> 
    <groupId>com.google.endpoints</groupId> 
    <artifactId>endpoints-framework</artifactId> 
    <version>2.0.7</version> 
</dependency> 
     <dependency> 
      <groupId>com.google.appengine</groupId> 
      <artifactId>appengine-api-1.0-sdk</artifactId> 
      <version>${appengine.target.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>com.google.appengine</groupId> 
      <artifactId>appengine-endpoints</artifactId> 
      <version>${appengine.target.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>javax.servlet</groupId> 
      <artifactId>servlet-api</artifactId> 
      <version>2.5</version> 
      <scope>provided</scope> 
     </dependency> 
     <dependency> 
      <groupId>javax.inject</groupId> 
      <artifactId>javax.inject</artifactId> 
      <version>1</version> 
     </dependency> 
     <dependency> 
      <groupId>com.googlecode.objectify</groupId> 
      <artifactId>objectify</artifactId> 
      <version>5.0</version> 
     </dependency> 

     <dependency> 
    <groupId>com.google.endpoints</groupId> 
    <artifactId>endpoints-management-control-appengine</artifactId> 
    <version>1.0.0-beta.11</version> 
</dependency> 
<dependency> 
    <groupId>com.google.endpoints</groupId> 
    <artifactId>endpoints-framework-auth</artifactId> 
    <version>1.0.0-beta.11</version> 
</dependency> 



     <!-- Test Dependencies --> 
     <dependency> 
      <groupId>com.google.appengine</groupId> 
      <artifactId>appengine-testing</artifactId> 
      <version>${appengine.target.version}</version> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>com.google.appengine</groupId> 
      <artifactId>appengine-api-stubs</artifactId> 
      <version>${appengine.target.version}</version> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>4.11</version> 
     </dependency> 



    </dependencies> 

    <build> 
     <outputDirectory>target/${project.artifactId}-${project.version}/WEB-INF/classes</outputDirectory> 
     <plugins> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <version>2.5.1</version> 
       <artifactId>maven-compiler-plugin</artifactId> 
       <configuration> 
        <source>1.7</source> 
        <target>1.7</target> 
       </configuration> 
      </plugin> 
      <plugin> 
    <groupId>com.google.cloud.tools</groupId> 
    <artifactId>endpoints-framework-maven-plugin</artifactId> 
    <version>1.0.0-beta5</version> 
    <configuration> 
     <!-- plugin configuration --> 
    </configuration> 
</plugin> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-war-plugin</artifactId> 
       <version>2.3</version> 
       <configuration> 
        <webXml>${project.build.directory}/generated-sources/appengine-endpoints/WEB-INF/web.xml</webXml> 
        <webResources> 
         <resource> 
          <!-- this is relative to the pom.xml directory --> 
          <directory>${project.build.directory}/generated-sources/appengine-endpoints</directory> 
          <!-- the list has a default value of ** --> 
          <includes> 
           <include>WEB-INF/*.discovery</include> 
           <include>WEB-INF/*.api</include> 
          </includes> 
         </resource> 
        </webResources> 
       </configuration> 
      </plugin> 
      <plugin> 
       <groupId>com.google.appengine</groupId> 
       <artifactId>appengine-maven-plugin</artifactId> 
       <version>${appengine.target.version}</version> 
       <configuration> 
        <enableJarClasses>false</enableJarClasses> 
       </configuration> 
       <executions> 
        <execution> 
         <goals> 
          <goal>endpoints_get_discovery_doc</goal> 
         </goals> 
        </execution> 
       </executions> 
      </plugin> 
     </plugins> 
     <pluginManagement> 
      <plugins> 
       <!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.--> 
       <plugin> 
        <groupId>org.eclipse.m2e</groupId> 
        <artifactId>lifecycle-mapping</artifactId> 
        <version>1.0.0</version> 
        <configuration> 
         <lifecycleMappingMetadata> 
          <pluginExecutions> 
           <pluginExecution> 
            <pluginExecutionFilter> 
             <groupId> 
              com.google.appengine 
             </groupId> 
             <artifactId> 
              appengine-maven-plugin 
             </artifactId> 
             <versionRange> 
              [1.9.3,) 
             </versionRange> 
             <goals> 
              <goal> 
               endpoints_get_discovery_doc 
              </goal> 
             </goals> 
            </pluginExecutionFilter> 
            <action> 
             <ignore></ignore> 
            </action> 
           </pluginExecution> 
          </pluginExecutions> 
         </lifecycleMappingMetadata> 
        </configuration> 
       </plugin> 
      </plugins> 
     </pluginManagement> 
    </build> 
    <groupId>in.prago</groupId> 
    <artifactId>prago</artifactId> 
</project> 

更新です貧困。私はコードを実行しようとしましたが、同じエラーが再び発生しました。ここに私のスタックトレースが

> com.google.api.server.spi.SystemService invokeServiceMethod: exception 
> occurred while calling backend method (SystemService.java:398) 
> 
> java.lang.NoSuchMethodError: 
> com.google.common.base.Preconditions.checkState(ZLjava/lang/String;Ljava/lang/Object;)V 
> at 
> com.google.firebase.FirebaseApp.checkNotDeleted(FirebaseApp.java:314) 
> at com.google.firebase.FirebaseApp.getOptions(FirebaseApp.java:260) 
> at 
> com.google.firebase.database.FirebaseDatabase.getInstance(FirebaseDatabase.java:80) 
> at 
> in.prago.spi.PragoMerchantApi.saveProfile(PragoMerchantApi.java:189) 
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
> at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
> at java.lang.reflect.Method.invoke(Method.java:42) at 
> com.google.api.server.spi.SystemService.invokeServiceMethod(SystemService.java:363) 
> at 
> com.google.api.server.spi.SystemServiceServlet.execute(SystemServiceServlet.java:113) 
> at 
> com.google.api.server.spi.SystemServiceServlet.doPost(SystemServiceServlet.java:71) 
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)  at 
> javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at 
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
> at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) 
> at 
> com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48) 
> at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
> at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
> at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
> at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
> at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
> at 
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) 
> at 
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
> at 
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
> at 
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
> at 
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
> at 
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
> at org.mortbay.jetty.Server.handle(Server.java:326)  at 
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
> at 
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) 
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
> at 
> com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:453) 
> at 
> com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:460) 
> at 
> com.google.tracing.CurrentContext.runInContext(CurrentContext.java:293) 
> at 
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:319) 
> at 
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:311) 
> at 
> com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:457) 
> at java.lang.Thread.run(Thread.java:745) 

http://maven.apache.org/xsd/maven-4.0.0.xsd ">

<modelVersion>4.0.0</modelVersion> 
    <packaging>war</packaging> 
    <version>1.0</version> 


    <properties> 
     <appengine.app.version>1</appengine.app.version> 
     <appengine.target.version>1.9.53</appengine.target.version> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    </properties> 

    <dependencies> 

    <dependency> 
    <groupId>com.google.firebase</groupId> 
    <artifactId>firebase-admin</artifactId> 
    <version>5.0.0</version> 
</dependency> 

<dependency> 

    <groupId>com.google.endpoints</groupId> 
    <artifactId>endpoints-framework</artifactId> 
    <version>2.0.7</version> 
</dependency> 
     <dependency> 
      <groupId>com.google.appengine</groupId> 
      <artifactId>appengine-api-1.0-sdk</artifactId> 
      <version>${appengine.target.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>com.google.appengine</groupId> 
      <artifactId>appengine-endpoints</artifactId> 
      <version>${appengine.target.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>javax.servlet</groupId> 
      <artifactId>servlet-api</artifactId> 
      <version>2.5</version> 
      <scope>provided</scope> 
     </dependency> 
     <dependency> 
      <groupId>javax.inject</groupId> 
      <artifactId>javax.inject</artifactId> 
      <version>1</version> 
     </dependency> 
     <dependency> 
      <groupId>com.googlecode.objectify</groupId> 
      <artifactId>objectify</artifactId> 
      <version>5.1.17</version> 
     </dependency> 

     <dependency> 
    <groupId>com.google.endpoints</groupId> 
    <artifactId>endpoints-management-control-appengine</artifactId> 
    <version>1.0.0-beta.11</version> 
</dependency> 
<dependency> 
    <groupId>com.google.endpoints</groupId> 
    <artifactId>endpoints-framework-auth</artifactId> 
    <version>1.0.0-beta.11</version> 
</dependency> 



     <!-- Test Dependencies --> 
     <dependency> 
      <groupId>com.google.appengine</groupId> 
      <artifactId>appengine-testing</artifactId> 
      <version>${appengine.target.version}</version> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>com.google.appengine</groupId> 
      <artifactId>appengine-api-stubs</artifactId> 
      <version>${appengine.target.version}</version> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>4.11</version> 
     </dependency> 



    </dependencies> 

    <build> 
     <outputDirectory>target/${project.artifactId}-${project.version}/WEB-INF/classes</outputDirectory> 
     <plugins> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <version>2.5.1</version> 
       <artifactId>maven-compiler-plugin</artifactId> 
       <configuration> 
        <source>1.7</source> 
        <target>1.7</target> 
       </configuration> 
      </plugin> 
      <plugin> 
    <groupId>com.google.cloud.tools</groupId> 
    <artifactId>endpoints-framework-maven-plugin</artifactId> 
    <version>1.0.0-beta5</version> 
    <configuration> 
     <!-- plugin configuration --> 
    </configuration> 
</plugin> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-war-plugin</artifactId> 
       <version>2.3</version> 
       <configuration> 
        <webXml>${project.build.directory}/generated-sources/appengine-endpoints/WEB-INF/web.xml</webXml> 
        <webResources> 
         <resource> 
          <!-- this is relative to the pom.xml directory --> 
          <directory>${project.build.directory}/generated-sources/appengine-endpoints</directory> 
          <!-- the list has a default value of ** --> 
          <includes> 
           <include>WEB-INF/*.discovery</include> 
           <include>WEB-INF/*.api</include> 
          </includes> 
         </resource> 
        </webResources> 
       </configuration> 
      </plugin> 
      <plugin> 
       <groupId>com.google.appengine</groupId> 
       <artifactId>appengine-maven-plugin</artifactId> 
       <version>${appengine.target.version}</version> 
       <configuration> 
        <enableJarClasses>false</enableJarClasses> 
       </configuration> 
       <executions> 
        <execution> 
         <goals> 
          <goal>endpoints_get_discovery_doc</goal> 
         </goals> 
        </execution> 
       </executions> 
      </plugin> 
     </plugins> 
     <pluginManagement> 
      <plugins> 
       <!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.--> 
       <plugin> 
        <groupId>org.eclipse.m2e</groupId> 
        <artifactId>lifecycle-mapping</artifactId> 
        <version>1.0.0</version> 
        <configuration> 
         <lifecycleMappingMetadata> 
          <pluginExecutions> 
           <pluginExecution> 
            <pluginExecutionFilter> 
             <groupId> 
              com.google.appengine 
             </groupId> 
             <artifactId> 
              appengine-maven-plugin 
             </artifactId> 
             <versionRange> 
              [1.9.3,) 
             </versionRange> 
             <goals> 
              <goal> 
               endpoints_get_discovery_doc 
              </goal> 
             </goals> 
            </pluginExecutionFilter> 
            <action> 
             <ignore></ignore> 
            </action> 
           </pluginExecution> 
          </pluginExecutions> 
         </lifecycleMappingMetadata> 
        </configuration> 
       </plugin> 
      </plugins> 
     </pluginManagement> 
    </build> 
    <groupId>in.prago</groupId> 
    <artifactId>prago</artifactId> 
</project> 

Answer 1

である私は、このエラーに走ったと私は使ったことがありませんグアバのいずれか。Funnily十分に、私Glassfishのサーバーには、インポート1オーバーグアババージョンです使用していた！あなたの問題グアバがどこから来ている見つけるために、エラーの前にこのコードを実行します。

System.out.println(com.google.common.base.Preconditions.class.getProtectionDomain().getCodeSource().getLocation().toExternalForm());

その後、最新のguava（現在はGuava 22.0）をダウンロードし、古いGuavaファイルを新しいものに置き換えます。これで問題は解決します。

この時点で、新しいfirebaseバージョンも使用する必要があります。私は、開発者も以前のfirebaseバージョンで間違ったGuavaバージョンを持っていたと思います。

 <dependency> 
     <groupId>com.google.firebase</groupId> 
     <artifactId>firebase-admin</artifactId> 
     <version>5.2.0</version> 
     </dependency> 

Answer 2

プロジェクトに含めるGuava新しいバージョン依存。

<dependency> 
    <groupId>com.google.guava</groupId> 
    <artifactId>guava</artifactId> 
    <version>22.0</version> 
</dependency>