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Editorial Team
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Asked: 2026-05-26T13:08:20+00:00

Seem to have a problem starting my Java app: Exception in thread main java.lang.NoClassDefFoundError:

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Seem to have a problem starting my Java app:

Exception in thread “main” java.lang.NoClassDefFoundError:
org/apache/juli/logging/LogFactory at
org.apache.catalina.util.LifecycleBase.(LifecycleBase.java:37)
Caused by: java.lang.ClassNotFoundException:
org.apache.juli.logging.LogFactory at
java.net.URLClassLoader$1.run(URLClassLoader.java:366) at
java.net.URLClassLoader$1.run(URLClassLoader.java:355) at
java.security.AccessController.doPrivileged(Native Method) at
java.net.URLClassLoader.findClass(URLClassLoader.java:354) at
java.lang.ClassLoader.loadClass(ClassLoader.java:423) at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at
java.lang.ClassLoader.loadClass(ClassLoader.java:356) … 1 more

Tried the solution here:
java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory

But I see tomcat-juli.jar already. Also I’m using Tomcat 7. What might be wrong?

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1 Answer

  1. Editorial Team

    Your vm does not find the class org/apache/juli/logging/LogFactory check if this class is present in the tomcat-juli.jar that you use (unzip it and search the file), if it’s not present download the library from apache web site else if it’s present put the tomcat-juli.jar in a path (the lib directory) that Tomcat use to load classes. If your Tomcat does not find it you can copy the jar in the lib directory of the JRE that you are using.

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