GRPC的Java未能執行目標org.apache.maven.plugins：Maven的編譯器插件：3.1

我無法建立的pom.xml，在鏈接下面提供GRPC-Java示例： https://github.com/grpc/grpc-java GRPC的Java未能執行目標org.apache.maven.plugins：Maven的編譯器插件：3.1

它給我以下錯誤。

[INFO] Scanning for projects... 
[INFO] ------------------------------------------------------------------------ 
[INFO] Detecting the operating system and CPU architecture 
[INFO] ------------------------------------------------------------------------ 
[INFO] os.detected.name: linux 
[INFO] os.detected.arch: x86_64 
[INFO] os.detected.release: ubuntu 
[INFO] os.detected.release.version: 14.04 
[INFO] os.detected.release.like.ubuntu: true 
[INFO] os.detected.release.like.debian: true 
[INFO] os.detected.classifier: linux-x86_64 
[INFO]                   
[INFO] ------------------------------------------------------------------------ 
[INFO] Building helloworld 0.0.1-SNAPSHOT 
[INFO] ------------------------------------------------------------------------ 
[INFO] 
[INFO] --- maven-protoc-plugin:0.4.3:compile (default) @ helloworld --- 
[INFO] Compiling 1 proto file(s) to /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/java 
[INFO] 
[INFO] --- maven-protoc-plugin:0.4.3:compile-custom (default) @ helloworld --- 
[WARNING] Missing POM for io.grpc:protoc-gen-grpc-java:exe:linux-x86_64:0.8.0 
[INFO] Compiling 1 proto file(s) to /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java 
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ helloworld --- 
[INFO] Using 'UTF-8' encoding to copy filtered resources. 
[INFO] skip non existing resourceDirectory /home/pradnya/workspace/helloworld/src/main/resources 
[INFO] Copying 1 resource 
[INFO] Copying 1 resource 
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ helloworld --- 
[INFO] Changes detected - recompiling the module! 
[INFO] Compiling 7 source files to /home/pradnya/workspace/helloworld/target/classes 
[INFO] ------------------------------------------------------------- 
[ERROR] COMPILATION ERROR : 
[INFO] ------------------------------------------------------------- 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[24,38] method marshaller in class io.grpc.protobuf.ProtoUtils cannot be applied to given types; 
    required: T 
    found: com.google.protobuf.Parser<io.grpc.examples.helloworld.HelloRequest> 
    reason: inferred type does not conform to declared bound(s) 
    inferred: com.google.protobuf.Parser<io.grpc.examples.helloworld.HelloRequest> 
    bound(s): com.google.protobuf.MessageLite 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[25,38] method marshaller in class io.grpc.protobuf.ProtoUtils cannot be applied to given types; 
    required: T 
    found: com.google.protobuf.Parser<io.grpc.examples.helloworld.HelloResponse> 
    reason: inferred type does not conform to declared bound(s) 
    inferred: com.google.protobuf.Parser<io.grpc.examples.helloworld.HelloResponse> 
    bound(s): com.google.protobuf.MessageLite 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[79,45] callOptions has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[79,11] channel has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[103,45] callOptions has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[103,11] channel has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[128,45] callOptions has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[128,11] channel has private access in io.grpc.stub.AbstractStub 
[INFO] 8 errors 
[INFO] ------------------------------------------------------------- 
[INFO] ------------------------------------------------------------------------ 
[INFO] BUILD FAILURE 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 9.203 s 
[INFO] Finished at: 2015-09-22T09:25:43+05:30 
[INFO] Final Memory: 17M/59M 
[INFO] ------------------------------------------------------------------------ 
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project helloworld: Compilation failure: Compilation failure: 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[24,38] method marshaller in class io.grpc.protobuf.ProtoUtils cannot be applied to given types; 
[ERROR] required: T 
[ERROR] found: com.google.protobuf.Parser<io.grpc.examples.helloworld.HelloRequest> 
[ERROR] reason: inferred type does not conform to declared bound(s) 
[ERROR] inferred: com.google.protobuf.Parser<io.grpc.examples.helloworld.HelloRequest> 
[ERROR] bound(s): com.google.protobuf.MessageLite 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[25,38] method marshaller in class io.grpc.protobuf.ProtoUtils cannot be applied to given types; 
[ERROR] required: T 
[ERROR] found: com.google.protobuf.Parser<io.grpc.examples.helloworld.HelloResponse> 
[ERROR] reason: inferred type does not conform to declared bound(s) 
[ERROR] inferred: com.google.protobuf.Parser<io.grpc.examples.helloworld.HelloResponse> 
[ERROR] bound(s): com.google.protobuf.MessageLite 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[79,45] callOptions has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[79,11] channel has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[103,45] callOptions has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[103,11] channel has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[128,45] callOptions has private access in io.grpc.stub.AbstractStub 
[ERROR] /home/pradnya/workspace/helloworld/target/generated-sources/protobuf/grpc-java/io/grpc/examples/helloworld/GreeterGrpc.java:[128,11] channel has private access in io.grpc.stub.AbstractStub 
[ERROR] -> [Help 1] 
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. 
[ERROR] Re-run Maven using the -X switch to enable full debug logging. 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles: 
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

我的pom.xml如下：

<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> 

    <groupId>io.grpc.examples</groupId> 
    <artifactId>helloworld</artifactId> 
    <version>0.0.1-SNAPSHOT</version> 
    <packaging>jar</packaging> 

    <name>helloworld</name> 
    <url>http://maven.apache.org</url> 

    <properties> 
    <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>com.datastax.cassandra</groupId> 
    <artifactId>cassandra-driver-core</artifactId> 
    <version>2.1.7.1</version> 
</dependency> 
<dependency> 
    <groupId>io.grpc</groupId> 
    <artifactId>grpc-all</artifactId> 
    <version>0.9.0</version> 
</dependency> 
    </dependencies> 


    <pluginRepositories> 
    <pluginRepository> 
    <releases> 
     <updatePolicy>never</updatePolicy> 
    </releases> 
    <snapshots> 
     <enabled>false</enabled> 
    </snapshots> 
    <id>central</id> 
    <name>Central Repository</name> 
    <url>https://repo.maven.apache.org/maven2</url> 
    </pluginRepository> 
    <pluginRepository> 
    <id>protoc-plugin</id> 
    <url>https://dl.bintray.com/sergei-ivanov/maven/</url> 
    </pluginRepository> 
</pluginRepositories> 
<build> 
    <extensions> 
    <extension> 
     <groupId>kr.motd.maven</groupId> 
     <artifactId>os-maven-plugin</artifactId> 
     <version>1.4.0.Final</version> 
    </extension> 
    </extensions> 
    <plugins> 
    <plugin> 
     <groupId>com.google.protobuf.tools</groupId> 
     <artifactId>maven-protoc-plugin</artifactId> 
     <version>0.4.3</version> 
     <configuration> 
     <!-- 
      The version of protoc must match protobuf-java. If you don't depend on 
      protobuf-java directly, you will be transitively depending on the 
      protobuf-java version that grpc depends on. 
     --> 
     <protocArtifact>com.google.protobuf:protoc:3.0.0-beta-1:exe:${os.detected.classifier}</protocArtifact> 
     <pluginId>grpc-java</pluginId> 
     <pluginArtifact>io.grpc:protoc-gen-grpc-java:0.8.0:exe:${os.detected.classifier}</pluginArtifact> 
     </configuration> 
     <executions> 
     <execution> 
      <goals> 
      <goal>compile</goal> 
      <goal>compile-custom</goal> 
      </goals> 
     </execution> 
     </executions> 
    </plugin> 
    </plugins> 
</build> 
</project>

想用GRPC，所有0.9.0版本明確地建立它。

來源

2015-09-22 Pradnya Alchetti

我相信這個問題是使用0.8.0 GRPC代碼生成器：

<pluginId>grpc-java</pluginId> 
<pluginArtifact>io.grpc:protoc-gen-grpc-java:0.8.0:exe:${os.detected.classifier}</pluginArtifact>

但0.9.0庫：

<dependency> 
    <groupId>io.grpc</groupId> 
    <artifactId>grpc-all</artifactId> 
    <version>0.9.0</version> 
</dependency>

v0.8.0是最後一個版本GRPC沒」 t提供任何API保證。 v0.9.0以後，我們希望使用較新的gRPC運行時庫可以兼容較舊的代碼生成器（儘管可能缺少功能/改進）。

來源

2016-01-15 23:43:41

GRPC的Java未能執行目標org.apache.maven.plugins：Maven的編譯器插件：3.1

回答

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