org.apache.maven.plugin.MojoExecutionException:protoc失败

Question

当我使用maven从源代码编译hadoop时,我遇到了一些问题.这是错误,任何人都可以帮助我吗？谢谢.

[ERROR] Failed to execute goal org.apache.hadoop:hadoop-maven-plugins:3.0.0-SNAPSHOT:protoc (compile-protoc) on project hadoop-c
 [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.hadoop:hadoop-maven-plugins:3.0.0-SNAP
plugin.MojoExecutionException: protoc failure
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: org.apache.maven.plugin.MojoExecutionException: protoc failure
        at org.apache.hadoop.maven.plugin.protoc.ProtocMojo.execute(ProtocMojo.java:81)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
        ... 19 more
**Caused by: org.apache.maven.plugin.MojoExecutionException: protoc failure**
        at org.apache.hadoop.maven.plugin.protoc.ProtocMojo.execute(ProtocMojo.java:78)
        ... 21 more
[ERROR]
[ERROR]

Answer 1

在该指令http://wiki.apache.org/hadoop/HowToContribute解释一些建筑的Hadoop的不太明显的方面-包括这一项.这里的主要问题是hadoop的YARN框架需要Protocol Buffers,你很可能没有安装它们.

似乎问题可能是你没有正确解释错误,所以 -

如何隔离Build错误

任何失败的魔法应该与一个类相关联.

在这种情况下,失败的mojo在这里:

https://svn.apache.org/repos/asf/hadoop/common/trunk/hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/protoc/ProtocMojo.java

看一下代码,很清楚这个Mojo需要运行"protoc"程序.

http://code.google.com/p/protobuf/

解

要构建hadoop,您需要协议缓冲区.这可以从源代码安装在*NIX机器上,运行以下命令从googlecode获取代码(取自http://numbers.brighterplanet.com/2012/04/14/how-to-install-mosh- on-amazon-ec2 /).

wget http://protobuf.googlecode.com/files/protobuf-2.4.1.tar.gz
tar xzf protobuf-2.4.1.tar.gz
cd protobuf-2.4.1
./configure
make
sudo make install
sudo ldconfig