Caused by: java.lang.ClassNotFoundException: backtype.storm.topology.IRichSpout

1：初次运行Strom程序出现如下所示的错误，贴一下，方便脑补，也希望帮助到看到的小伙伴：

错误如下所示，主要问题是刚开始使用maven获取jar包的时候需要写<scope>provided</scope>，运行的时候需要把这行注释了即可，这是作用域的问题，开始需要在本地下载jar包，但是在虚拟机运行的时候已经存在这些jar包了，所以再写这句话就冲突了：

1 java.lang.NoClassDefFoundError: backtype/storm/topology/IRichSpout
2     at java.lang.Class.getDeclaredMethods0(Native Method)
3     at java.lang.Class.privateGetDeclaredMethods(Class.java:2625)
4     at java.lang.Class.getMethod0(Class.java:2866)
5     at java.lang.Class.getMethod(Class.java:1676)
6     at sun.launcher.LauncherHelper.getMainMethod(LauncherHelper.java:494)
7     at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:486)
8 Caused by: java.lang.ClassNotFoundException: backtype.storm.topology.IRichSpout
9     at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
10     at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
11     at java.security.AccessController.doPrivileged(Native Method)
12     at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
13     at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
14     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
15     at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
16     ... 6 more
17 Exception in thread "main"
18 Process finished with exit code 1

解决方法如下所示：



 贴下pom.xml文件：

<?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>

<groupId>com.bie</groupId>
<artifactId>storm</artifactId>
<version>1.0-SNAPSHOT</version>

<!-- storm的依赖关系 -->
<dependencies>
<dependency>
<groupId>org.apache.storm</groupId>
<artifactId>storm-core</artifactId>
<version>0.9.5</version>
<!--<scope>provided</scope>-->
</dependency>
</dependencies>

<!--如果依赖外部包，就打不进去外部包，所以需要引入下面所示-->
<build>
<plugins>
<plugin>
<!--把其他外部依赖的jar包打成一个大jar包-->
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.bie.wordcount.WordCountTopologyMain</mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>

</project>

停更......