java.lang.NoClassDefFoundError

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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

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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.

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

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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.

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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

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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.

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

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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

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  • java.lang.NoClassDefFoundError: org/jaxen/JaxenException at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2413) at java.lang.Class.getConstructor0(Class.java:2723) at java.lang.Class.newInstance0(Class.java:345) at java.lang.Class.newInstance(Class.java:327) at org.apache.nutch.plugin.Extension.getExtensionInstance(Extension.java:160) at org.apache.nutch.parse.ParseFilters.<init>(ParseFilters.java:63) at org.apache.nutch.parse.ParserJob.getFields(ParserJob.java:191) at org.apache.nutch.parse.ParserJob.run(ParserJob.java:245) at org.apache.nutch.crawl.Crawler.runTool(Crawler.java:68) at org.apache.nutch.crawl.Crawler.run(Crawler.java:171) at org.apache.nutch.crawl.Crawler.run(Crawler.java:250) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.nutch.crawl.Crawler.main(Crawler.java:257) Caused by: java.lang.ClassNotFoundException: org.jaxen.JaxenException at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) ... 14 more

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