'org.apache.commons.logging.impl.Log4JLogger' cannot be found
14,529
Solution 1
remove all references of NTEventLog and it will work. If you uncomment this appender it may be work if the source is a valid name.
#log4j.rootLogger=DEBUG,CA,NTEventLog
log4j.rootLogger=DEBUG,CA
#Console Appender
log4j.appender.CA=org.apache.log4j.ConsoleAppender
log4j.appender.CA.layout=org.apache.log4j.PatternLayout
log4j.appender.CA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
#File Appender
log4j.appender.FA=org.apache.log4j.FileAppender
log4j.appender.FA.File=sample.log
log4j.appender.FA.layout=org.apache.log4j.PatternLayout
log4j.appender.FA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
#Event Log Appender
#log4j.appender.NTEventLog=org.apache.log4j.nt.NTEventLogAppender
#log4j.appender.NTEventLog.layout=org.apache.log4j.PatternLayout
#log4j.appender.NTEventLog.layout.ConversionPattern=%m%n
#log4j.appender.NTEventLog.source=ESBWebServices
# Set the logger level of File Appender to WARN
log4j.appender.FA.Threshold = WARN
Do not forget to place NTEventLogAppender.dll, NTEventLogAppender.amd64.dll, NTEventLogAppender.ia64.dll or NTEventLogAppender.x86.dll as appropriate in a directory that is on the PATH of the Windows system. Otherwise, you will get a java.lang.UnsatisfiedLinkError.
Solution 2
I think there's a copy of commons-logging in TOMCAT_HOME/lib, so potentially you could be encountering a classpath conflict, but I'd check the apache commons logging docs to make sure you've got it set up properly.
Author by
user1912404
Updated on June 09, 2022Comments
-
user1912404 almost 2 years
In my Java Web Service, I am trying to write logs to windows event viewer, using log4j. I am using Eclipse as an IDE to deploy it using Tomcat.
this is my log4j.properties:
log4j.rootLogger=DEBUG, CA, NTEventLog log4j.rootLogger=DEBUG, CA, NTEventLog #Console Appender log4j.appender.CA=org.apache.log4j.ConsoleAppender log4j.appender.CA.layout=org.apache.log4j.PatternLayout log4j.appender.CA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n #File Appender log4j.appender.FA=org.apache.log4j.FileAppender log4j.appender.FA.File=sample.log log4j.appender.FA.layout=org.apache.log4j.PatternLayout log4j.appender.FA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n #Event Log Appender log4j.appender.NTEventLog=org.apache.log4j.nt.NTEventLogAppender log4j.appender.NTEventLog.source=ESB Web Services # Set the logger level of File Appender to WARN log4j.appender.FA.Threshold = WARNthis is my classpath:
<?xml version="1.0" encoding="UTF-8"?> <classpath> <classpathentry kind="src" path="src"/> <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jre6"> <attributes> <attribute name="owner.project.facets" value="java"/> </attributes> </classpathentry> <classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.tomcat.runtimeTarget/Apache Tomcat v6.0"> <attributes> <attribute name="owner.project.facets" value="jst.web"/> </attributes> </classpathentry> <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/> <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/> <classpathentry kind="lib" path="dom4j-1.6.1.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="jide-oss-2.1.1.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="jtds-1.2.6.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="poi-3.9-20121203.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="poi-ooxml-3.9-20121203.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="poi-ooxml-schemas-3.9-20121203.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="stax-api-1.0.1.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="xmlbeans-2.3.0.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="NTEventLogAppender.amd64.dll"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="NTEventLogAppender.dll"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="log4j-1.2.17.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="commons-logging-1.1.2.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="commons-logging-1.1.2-javadoc.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="commons-logging-1.1.2-sources.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="commons-logging-1.1.2-test-sources.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="commons-logging-1.1.2-tests.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="commons-logging-adapters-1.1.2.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="commons-logging-api-1.1.2.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="lib" path="commons-logging-tests.jar"> <attributes> <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/> </attributes> </classpathentry> <classpathentry kind="output" path="build/classes"/> </classpath>once I deploy the the code on tomcat the following
exception occur:
org.apache.commons.logging.LogConfigurationException: User-specified log class 'org.apache.commons.logging.impl.Log4JLogger' cannot be found or is not useable. at org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(LogFactoryImpl.java:874) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:604) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:336) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:310) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685) at org.apache.axis2.deployment.DeploymentEngine.<clinit>(DeploymentEngine.java:76) at org.apache.axis2.transport.http.AxisServlet.initConfigContext(AxisServlet.java:584) at org.apache.axis2.transport.http.AxisServlet.init(AxisServlet.java:454) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Unknown Source)