java.lang.NullPointerException

Stack Overflow | Wael | 1 month ago
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  1. 0

    Strange Logging initialisation problems...

    jpf | 1 decade ago | nobody
    org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException) (Caused by org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException))
  2. 0

    Jar hell concerning log4j (Open Source Projects forum at Coderanch)

    coderanch.com | 12 months ago
    org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
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  4. 0

    Faces Servlet error

    Coderanch | 9 years ago | Gagan Sabharwal
    org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Jdk14Logger does not implement Log
  5. 0

    GitHub comment 65#124081368

    GitHub | 2 years ago | johanhaleby
    org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy. You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.) (Caused by org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy. You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed. (Caused by org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy. You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.))

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor()
    2. Apache Commons Logging
      LogFactory.getLog
      1. org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:374)
      2. org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
      3. org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
      4. org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
      5. org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
      5 frames
    3. Apache Axis2 - Transport - HTTP
      AxisAdminServlet.<clinit>
      1. org.apache.axis2.transport.http.AxisAdminServlet.<clinit>(AxisAdminServlet.java:34)
      1 frame
    4. Java RT
      Class.newInstance
      1. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      2. sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
      3. sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
      4. java.lang.reflect.Constructor.newInstance(Constructor.java:423)
      5. java.lang.Class.newInstance(Class.java:442)
      5 frames
    5. Glassfish Core
      ContainerBase$StartChild.call
      1. org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:114)
      2. org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1146)
      3. org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1085)
      4. org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5349)
      5. org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5641)
      6. org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
      7. org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
      8. org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
      8 frames
    6. Java RT
      Thread.run
      1. java.util.concurrent.FutureTask.run(FutureTask.java:266)
      2. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      3. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      4. java.lang.Thread.run(Thread.java:745)
      4 frames