Failed to initialize log4j

Question

I am trying to initialize log4j-1.2.8 for my application by creating a listener class implemented from ApplicationLifecycleListener from Weblogic 9.2. When I deploy the application, I get the following exceptions:

java.lang.NoClassDefFoundError: org/apache/log4j/spi/RepositorySelector
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:338)
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:291)
at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:259)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:158)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at myApp.LoggerStartupService.preStart(LoggerStartupService.java:40)
at weblogic.application.internal.flow.BaseLifecycleFlow$PreStartAction.run(BaseLifecycleFlow.java:187)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.application.internal.flow.BaseLifecycleFlow$BaseAction.invoke(BaseLifecycleFlow.java:95)
at weblogic.application.internal.flow.BaseLifecycleFlow.preStart(BaseLifecycleFlow.java:53)
at weblogic.application.internal.flow.HeadLifecycleFlow.prepare(HeadLifecycleFlow.java:199)
at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:615)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:191)
at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:147)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:61)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:189)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:87)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:217)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:718)
at weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1185)
at weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:247)
at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:157)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:157)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$000(DeploymentReceiverCallbackDeliverer.java:12)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$1.run(DeploymentReceiverCallbackDeliverer.java:45)
at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)

where myApp.LoggerStartupServiceis the class implemented from ApplicationLifecycleListener.

I checked the class path in my scripts and set it correctly for all the dependencies needed for log4j. Attributes and categories are also present in log4j.xml. Looks like I'm missing something. Any ideas on what could be the issue?

Answer 1

java.lang.NoClassDefFoundError: org/apache/log4j/spi/RepositorySelector

, ( , ClassNotFoundException).

Log4j , , , JAR Log4j. RepositorySelector javadoc , Log4j 1.2. Log4j JAR , . , Weblogic. Weblogic, , , , Weblogic. .

Answer 2

myApp.LoggerStartupService - , ApplicationLifecycleListener.

, .

, log4j. log4j.xml.

? ? , log4j.jar, ? ( ) CLASSPATH. ? , , .

( , MANIFEST.MF ).

Answer 3

In my case, I use log4j 2.x and cannot find org / apache / log4j / spi / RepositorySelector, because there is no such API in version 2.x, to use it, you need to add the dependency log4j-1.2 -api

    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-1.2-api</artifactId>
        <version>2.5</version>
    </dependency>

after

    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>2.5</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>2.5</version>
    </dependency>