Getting java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory exception

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i am executing simple Dependency Injection program of spring & getting this exception. I have already included common-logging1.1.1.jar and spring.jar file. Could you please help to out?

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
    at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:119)
    at org.springframework.context.support.AbstractXmlApplicationContext.<init>(AbstractXmlApplicationContext.java:55)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:77)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:65)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:56)
    at com.client.StoryReader.main(StoryReader.java:15)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClassInternal(Unknown Source)
    ... 6 more
noclassdeffounderror java
26 Answers

I generally assign the classpath to a variable and then verify it. I've written a small ruby script which I include in a my startup scripts which validates the classpath before launching java. Validating the classpath before the JVM starts has saved me lots of time troubleshooting these types of problems.

brianegge_141390

I have the same problem in eclipse IDE, my solution was: Right click in My project > Properties

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Click in Maven and write: jar in the Active Maven Project

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Finally, Apply and Close

user_49474360

In my case I was testing a Tomcat app in eclipse and got this error. I solved it by checking the .classpath file and corrected this entry:

<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
    <attributes>
        <attribute name="maven.pomderived" value="true"/>
        <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
    </attributes>
</classpathentry>

The attribute org.eclipse.jst.component.dependency had been missing.

user_112490

The topic is very outdated. But it still can be met ourdays.

commons-logging, or also known as jcl is a deprecated library. The last version was exposed in 2014

You should avoid adding dependency on it directly in your projects. I assume the most of answers and the accepted one are not actual anylonger.

A preferrable way to use in your projects new alternatives, like slf4j or log4j2, which play the same role, as jcl. The reasons and motivation is another big topic, not for the scope of this issue.

If your application uses log4j2, and you meet the error, add dependency:

<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-jcl</artifactId>
  <version>2.y.z</version>
</dependency>

If you prefer slf4j, (already offered in previous comments/replies ) use:

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>jcl-over-slf4j</artifactId>
    <version>${slf4j.version}</version>
</dependency>

If you use Spring, most probably you have in the dependency tree:

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-jcl</artifactId>
</dependency>

and it solves the issue as well.

In the examples I skipped certain versions by purpose, they get deprecated very quickly, see Offitial Maven repository.

In some cases you should not use version attribute at all, preferring using dependencies from BOM files. Spring is an example.

user_5118040
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