java.lang.NoClassDefFoundError [英] java.lang.NoClassDefFoundError
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问题描述
这里是我编译项目时得到的
Here what i got when compile the project
通过这个命令
mvn compile exec:java -Dexec.classPathScope=compile -Dexec.mainClass=trident.myproject
得到这个
java.lang.NoClassDefFoundError: storm/trident/state/StateFactory
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
at java.lang.Class.getMethod0(Class.java:2670)
at java.lang.Class.getMethod(Class.java:1603)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:285)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: storm.trident.state.StateFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 6 more
INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] An exception occured while executing the Java class. storm/trident /state/StateFactory
storm.trident.state.StateFactory
我查看了文件夹,但找不到这个类!虽然我之前成功运行过
i reviewed the folder and can't find this class ! although i ran it before successfully
我把pom文件写成部分
i wrote pom file as parts
<dependencies>
<dependency>
<groupId>storm</groupId>
<artifactId>storm</artifactId>
<version>0.8.2</version>
<scope>provided</scope>
</dependency>
pom.xml 的第 2 部分
part 2 of pom.xml
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>colt</groupId>
<artifactId>colt</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.0.0</version>
</dependency>
pom.xml 的第 3 部分
part 3 of pom.xml
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-core</artifactId>
<version>4.0.2</version>
</dependency>
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-stream</artifactId>
<version>4.0.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
推荐答案
您可能已经更改了 pom.xml 文件中依赖项的范围.如果您的容器提供了对所提供的依赖项更改范围.
You might have changed the scope of the dependency in your pom.xml file. If your container is providing the dependency change scope to provided.
<scope>provided</scope>
如果容器未提供要编译的依赖项更改范围.
If container is not providing the dependency change scope to compile.
<scope>compile</scope>
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