java.lang.ClassNotFoundException

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tip

A few things cause this exception: 1) Check if you have all jars and if they're in the correct path when running. 2) Your classpath might be broken, you can define it in the command line with "java -cp yourClassPath" or at your IDE if you're using one.

tip

If you're using Hibernate, this indicates you're missing FasterXML Classmate dependency, which you can add to your dependencies. To add it, the groupId is com.fasterxml and artifactId is Classmate.

tip

Check if you didn't forget to instantiate your topic in the kafka broker.

tip

NoClassDefFoundError means java has failed to find a class you're trying to instantiate, look if you've added the class you're trying to instantiate to the dependencies.

tip

You need to add httpcore to your dependencies. Try adding version 4.3 or further.

tip

You might've forgot to add a dependency or it's written wrong. Also, you might be using incompatible versions of Java and Hibernate. More on this here: https://goo.gl/SjSlRA

tip

This error means there's a class missing in your classpath during runtime. You need to create a jar with all your dependencies and have it in your classpath. Check Maven Assembly Plugin and how to add your dependencies to a jar: https://goo.gl/U2zr8k

tip

jsp-api and servlet-api jars must NOT be deployed by your web app. They should be marked as provided but not deployed by your app.

tip

The server rejects all jars that already belong to the server runtime (such as tomcat-**.jar, servlet**.jar). Consider substituting the CORS filter you're using for this one: https://goo.gl/ctQ7Fs

You have a different solution? A short tip here would help you and many other users who saw this issue last week.

  • GitHub comment 175#277485713
    via GitHub by martinvahi
    ,
  • GitHub comment 175#276915647
    via GitHub by martinvahi
    ,
  • GitHub comment 175#276919293
    via GitHub by martinvahi
    ,
  • I ran import maven projects from SCM against this version of maven...>> http://svn.apache.org/repos/asf/maven/components/tags/maven-2.1.0-M1/ in a command shell, i went to the top level directory of the project and typed mvn clean install The project built successfully as shown in the output below.. I selected F5 (refresh) and rebuilt the project in Eclipse. I observed many red X's on the top level projects indicating compile problems (even though the command line build was fine)... Next I tried right clicking on the top level maven project and choosing run as / maven install. This result in the build errors you can see below. {noformat} [INFO] [jar:jar] [INFO] Building jar: C:\ebay\m2eclipse\workspace.tues2\maven\maven-plugin-registry\target\maven-plugin-registry-2.1.0-M1.jar [INFO] ------------------------------------------------------------------------ [INFO] Building Maven Project Builder [INFO] [INFO] Id: org.apache.maven:maven-project:jar:2.1.0-M1 [INFO] task-segment: [package] [INFO] ------------------------------------------------------------------------ [INFO] [remote-resources:process] [INFO] [resources:resources] [INFO] Using default encoding to copy filtered resources. [INFO] [compiler:compile] [INFO] Nothing to compile - all classes are up to date [INFO] [resources:testResources] [INFO] Using default encoding to copy filtered resources. [INFO] [compiler:testCompile] [INFO] Nothing to compile - all classes are up to date [INFO] [surefire:test] [INFO] Surefire report directory: C:\ebay\m2eclipse\workspace.tues2\maven\maven-project\target\surefire-reports org.apache.maven.surefire.booter.SurefireExecutionException: Scm; nested exception is java.lang.NoClassDefFoundError: Scm java.lang.NoClassDefFoundError: Scm 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.apache.maven.surefire.junit.JUnitTestSet.createInstanceFromSuiteMethod(JUnitTestSet.java:176) at org.apache.maven.surefire.junit.JUnitTestSet.constructTestObject(JUnitTestSet.java:140) at org.apache.maven.surefire.junit.JUnitTestSet.getTestCount(JUnitTestSet.java:247) at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.locateTestSets(AbstractDirectoryTestSuite.java:104) at org.apache.maven.surefire.Surefire.createSuiteFromDefinition(Surefire.java:150) at org.apache.maven.surefire.Surefire.run(Surefire.java:111) 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.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:290) at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:818) Caused by: java.lang.ClassNotFoundException: Scm at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at org.apache.maven.surefire.booter.IsolatedClassLoader.loadClass(IsolatedClassLoader.java:103) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) ... 16 more {noformat}
    via by Deleted User,
    • java.lang.ClassNotFoundException: wombat at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at org.apache.maven.surefire.booter.IsolatedClassLoader.loadClass(IsolatedClassLoader.java:103) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:164) at org.jasig.portal.rdbm.pool.PooledDataSourceFactoryFactory.getPooledDataSourceFactory(PooledDataSourceFactoryFactory.java:74) at org.jasig.portal.rdbm.pool.PooledDataSourceFactoryFactoryTest.testGetPooledDataSourceFactory(PooledDataSourceFactoryFactoryTest.java:41) 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:585) at junit.framework.TestCase.runTest(TestCase.java:154) at junit.framework.TestCase.runBare(TestCase.java:127) at junit.framework.TestResult$1.protect(TestResult.java:106) at junit.framework.TestResult.runProtected(TestResult.java:124) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:118) at junit.framework.TestSuite.runTest(TestSuite.java:208) at junit.framework.TestSuite.run(TestSuite.java:203) at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213) at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138) at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125) at org.apache.maven.surefire.Surefire.run(Surefire.java:132) 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:585)

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