How to use log4j

Hi All,
I stucked with the following problem.
I need to write the log4j for my java application. But i don't know how to write logging's by usubg log4j package.
Anyone please help me in detail.
Thanks,
Kiran

I got that link . In there i didn't get how to
procede.
Please help me...........Gotta read and try it.
%

Similar Messages

How to use log4j logging

Hi all,
i'm very new to the world of software devlopment.I'm currently working on devloping banking application in JAVA.
I wanted to log all the exceptions thrown by the code.
Could any one of you tell me as to how to use log4j logging in my project. Also where to find the jar file. I searched the entire web but i didn't find it anywhere.
Thanks

You should find what you need on the Log4j Project Page.

How to use log4j into weblogic 10.3

Hi,
I am migrating an enterprise application from JBoss 4.3 + JBossCache to WebLogic 10.3+Coherence.
I am blocked since I can't get log4j to work inside WL.
I enabled log4j inside the administration console, as stated in the user guide.
Googling I've also found that I have to copy these 2 jars
wllog4j.jar
llog4j-1.2.14.jar
inside my domain lib directory (that is C:\Oracle\Middleware\user_projects\domains\base_domain\lib), and I did it.
Now where should I put the log4j.xml configuration file and how can I tell to WL to use that xml as log4j configuration ?
To give you more information, my classes use log4j in this way:
Logger log = Logger.getLogger(MyClass.class);
And I am constantly getting this error:
log4j:WARN No appenders could be found for logger (it.ltm.ejba.session.EjbAServiceBean).
log4j:WARN Please initialize the log4j system properly.
I hope someone can help me.
I apologize for this stupid question, but really I didn't find a good guide/tutorial on the net.
Thanks in advance.
Edited by: e.gherardini on 3-mar-2010 3.16

Hi Jay, thanks for helping me.
In fact what I am trying to do is a server-wide log4j configuration.
Your solution implies writing-deploying-maintaining 1 log4j configuration file for each application developed inside the application server.
This is not what I want to do.
Digging around WL 10.3 installation folders, I've found a log4j.properties file inside the medrec example application (C:\Oracle\Middleware\wlserver_10.3\samples\domains\medrec).
It uses this properties file setting a startup parameter to the server (file setDomainEnv.cmd):
set JAVA_PROPERTIES=%JAVA_PROPERTIES% -Dlog4j.configuration=file:%LOG4J_CONFIG_FILE%
I would like to do the same starting the server from eclipse 3.5.
I am working on this, I hope you can give some hints.
Thanks a lot

How to use log4j in struts project

Hi, all
I want to use log4j and pooling in my running project based on struts-tomcat.
Can any one tell me all the process in details step by step,to apply in my project
i m wait for any rply

Another day, another jargon-dump

How to use Log4J in EP for log info

HI Frndz ..
As per my requirment i have to give a report of all login users log information. In Java we have Log4J.jar as per miine it is the best API for generating Log information .
Actualy am trying to place this code and JAR file in com.sap.portal,runtime.logon.par but am not getting any needful output.
Colud anyonr suggest me how can we get the Log data usiing Log4J in Portal.
Thanks in Advance
Regards
Rajesh

Hi Rajesh,
please check the below link it might be helpful to you.
Use Class Log4j for logging java application
Regards
Narendra

How to use log4j in our application

Hi All,
I have bit of confused while using the log4j in our java application.
Please give me the sample code how do we logging our applications?
Thanks in advance..........

please give any suggestions........http://logging.apache.org/log4j/docs/documentation.html <- please read.

How to use log4j in OC4j

Can you give me a sample log4j.xml used for oc4j (orcle 9iAS ). Also
I want to read a env. variable to read the oc4j home in that xml to redirect the log msgs to that folder.Any clue on that ?
(I am developing windows env & deploying solaris. So I cannot use C:\oc4j\.... in my log4j.xml . I need to read the oc4j home from env variable)

This is mine. You cannot read environment variables in the DB JVM using System.getProperty(). One solution may be to configure log properties dynamically using PropertyConfigurator.configure().
log4j.rootLogger=DEBUG, logfile
# Log file appender configuration
log4j.appender.logfile.File=batch.log
log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.layout=org.apache.log4j.xml.XMLLayout
regards,
Chris

How to use log4j in an EJB Module??

I have included the log4j.jar in libraries;
added log4j.xml in the sources folder;
but I m getting an error:
<Apr 22, 2014 11:07:50 AM PKT> <Warning> <EJB> <BEA-010065> <MessageDrivenBean threw an Exception in onMessage(). The exception is:
java.lang.NoClassDefFoundError: org/apache/log4j/Logger.
java.lang.NoClassDefFoundError: org/apache/log4j/Logger
    at test.MyMessageBean.onMessage(MyMessageBean.java:39)
    at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:575)
    at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:477)
    at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:375)
    at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:4855)
    Truncated. see log file for complete stacktrace
Kindly guide me how to resolve this???
Thank you!

"I have included the log4j.jar in libraries" -> what does that actually mean? What steps did you take and where?
Because one thing is for certain: the jar is not deployed to the proper location so it is on the application's classpath or else you wouldn't be running into this issue.

Using log4j in jdk1.4

Hi,
I'm Babu. I am wanting to know about the how to of using log4j in jdk 1.4.
Babu.

Do you have a question specifically about how to use log4j in jdk 1.4? There's nothing different when using log4j with jdk 1.4 than with other versions. Put log4j.jar in your classpath. Read the log4j documentation.
Jesper

Using log4j in EJB: where to configure the logging service?

Hi there,
I have a question on how to use log4j in EJBs. Details:
I want to provide a static final Logger instance in each bean class. This logger will be used by my bean instance to log some interesting messages. The log4j service should be initialized (by calling BasicConfigurator.configure() for example) only once before any message is logged. So where should i place the initialization code?
I know that for a web app, i can define a ServletContextListener implementation to do the initialization work when my web app is loaded. Is there anything similar for EJB?
Thanks in advance.
heavyz

Hi xHacher,
do you mean something like this?
public class LogFactory {
    static {
        BasicConfigurator.configure();
    public static Logger getLogger(Class clazz) {
        return Logger.getLogger(clazz);
}And in each of my bean class, i may get the logger by using:
private static final Logger log = LogFactory.getLogger(MyBean.class);The code above ensures that log4j is well initialized before any logger instance is created. But any better solutions?
heavyz

How to create the log file in remote system using log4j.

Hi,
How to create the log file in remote system using log4j. please give me a sample code or related links.The below example i used for create the log file in remote system but it return the below exception.Is there any authandication parameter for accessing the remote path? Please help.
public class Logging
Logger log=null;
FileAppender fileapp=null;
public Logging(String classname)
try
log = Logger.getLogger(classname);
String path=" [\\192.168.0.14\\c$\\LOG\\d9\\May_08_2008_log.txt|file://\\192.168.0.14\\c$\\LOG\\d9\\May_08_2008_log.txt]";
fileapp = new FileAppender(new PatternLayout("%r [%t] %-5p %c %x - %m%n"),path, true);
log.addAppender(fileapp);
log.info("Logger initilized");
}catch(Exception ex)
ex.printStackTrace();
java.io.FileNotFoundException: \\192.168.0.14\c$\LOG\d9\May_08_2008_log.txt (The network path was not found)
at java.io.FileOutputStream.openAppend(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at org.apache.log4j.FileAppender.setFile(FileAppender.java:290)
at org.apache.log4j.FileAppender.<init>(FileAppender.java:109)
at annwyn.logger.BioCapLogger.<init>(Logging.java:23)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Please help.
Thanks in advance.
Saravanan.K

Sorry path is missing for the above request.
path="\\192.168.0.14\c$\LOG\d9\May_08_2008_log.txt ";
please help.
Saravanan.K

How to configure WL 10.3 to used log4j instead of jdk logging

Hi,
How can I configure WL 10.3 to use log4j instead of jdk default logging. I did changed the logging to log4j through the console for the AdminServer and one of the Managed Instance. I try to deploy axis2.war but it fails and complains about apache logger class not found. So wondering what other settings do I need. I even copied log4j-1.2.15.jar & wllog4j.jar in WL_DOMIAN\lib and restaretd the server but still gets the following error is
'weblogic.application.ModuleException: [HTTP:101216]Servlet: "AxisServlet" failed to preload on startup in Web application: "axis".
java.lang.ExceptionInInitializerError
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
     at java.lang.Class.newInstance0(Class.java:355)
     at java.lang.Class.newInstance(Class.java:308)
     at weblogic.servlet.internal.WebComponentContributor.getNewInstance(WebComponentContributor.java:223)
     at weblogic.servlet.internal.WebComponentContributor.createServletInstance(WebComponentContributor.java:247)
     at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:255)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
     at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64)
     at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
     at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48)
     at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:521)
     at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1913)
     at weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1887)
     at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1805)
     at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:3041)
     at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1374)
     at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:452)
     at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
     at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
     at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)
     at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117)
     at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
     at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
     at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:27)
     at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:629)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
     at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:206)
     at weblogic.application.internal.SingleModuleDeployment.activate(SingleModuleDeployment.java:40)
     at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:161)
     at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:79)
     at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:569)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:140)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:106)
     at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:323)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:844)
     at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1253)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:440)
     at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:163)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:67)
     at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@70b01a for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Logger) (Caused by org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@70b01a for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Logger))
     at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
     at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
     at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
     at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
     at org.apache.axis2.transport.http.AxisServlet.<clinit>(AxisServlet.java:83)
     ... 50 more
Caused by: org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@70b01a for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Logger)
     at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:413)
     at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
     ... 54 more
Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Logger
     at java.lang.Class.getDeclaredConstructors0(Native Method)
     at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
     at java.lang.Class.getConstructor0(Class.java:2699)
     at java.lang.Class.getConstructor(Class.java:1657)
     at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:410)
     ... 55 moreThanks

Go to Environments >> servers>> adminServer >> logging >> advanced
change the default JDK logging to log4j
by default weblogic provides two types of logging JDK and log4j

Can anyone help how to print stack trace messages using log4j?

Can anyone help how to print stack trace messages using log4j?

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
<appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %m%n"/>
</layout>
</appender>
<appender name="DEBUG" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/usr/local/dice/d2jbin/cmdToNetJobs/app-debug.log"/>
<param name="Append" value="true"/>
<param name="MaxFileSize" value="1000KB"/>
<param name="MaxBackupIndex" value="5"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %m%n"/>
</layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMin" value="DEBUG" />
<param name="LevelMax" value="DEBUG" />
</filter>
</appender>
<appender name="INFO" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/usr/local/dice/d2jbin/cmdToNetJobs/app-info.log"/>
<param name="Append" value="true"/>
<param name="MaxFileSize" value="1000KB"/>
<param name="MaxBackupIndex" value="5"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %m%n"/>
</layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMin" value="INFO" />
<param name="LevelMax" value="INFO" />
</filter>
</appender>
<appender name="WARN" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/usr/local/dice/d2jbin/cmdToNetJobs/app-warn.log"/>
<param name="Append" value="true"/>
<param name="MaxFileSize" value="1000KB"/>
<param name="MaxBackupIndex" value="5"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %m%n"/>
</layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMin" value="WARN" />
<param name="LevelMax" value="WARN" />
</filter>
</appender>
<appender name="ERROR" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/usr/local/dice/d2jbin/cmdToNetJobs/app-error.log"/>
<param name="Append" value="true"/>
<param name="MaxFileSize" value="1000KB"/>
<param name="MaxBackupIndex" value="5"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %m%n"/>
</layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMin" value="ERROR" />
<param name="LevelMax" value="ERROR" />
</filter>
</appender>
<root>
<priority value="debug"/>
<appender-ref ref="DEBUG"/>
<appender-ref ref="INFO"/>
<appender-ref ref="WARN"/>
<appender-ref ref="ERROR"/>
</root>
</log4j:configuration>
I ve written like this
and to print stack trace I used
log.error(Throwable(e))
but does nt display printstacktrace how to do it

How to create outside Logging file in osb 11g using log4j.jar?

Hi all,
Currently, i am using osb 11g to develop a system. In the system we need to create a log file using log4j.jar library. This sub-program is working in the osb 10g base but fail to work in the osb 11g base. Can anyone give me some advice about this matter? Have anyone created one like this in 11g? Is it successful?

Sorry path is missing for the above request.
path="\\192.168.0.14\c$\LOG\d9\May_08_2008_log.txt ";
please help.
Saravanan.K

How can I use log4j-1.2.x in a J2EE connector?

My J2EE connector internally uses log4j-1.2.6. Although the log4j.jar file is part of the .rar file and a Class-Path entry has been added to the manifest, I get the following error message when trying to deploy the connector to WLS 7.0: " javax.resource.spi.ApplicationServerInternalException: Error loading class ManagedPayAdvConnectionFactory
          . Reason: org/apache/log4j/Logger"
          Any help is appreciated.


          I have only had success using the Class-Path: manifest header using an EAR deployment.
          With a standalone RAR, it seems to be ignored.
          The EAR structure should be similar to the following
          /META-INF/Manifest.mf - standard manifest
          /log4j-1.2.6.jar
          /foo.rar
          Then, in foo.rar's Manifest.mf, set the Class-Path relative to the EAR root (i.e.
          - Class-Path: log4j-1.2.6.jar). Naturally, the down side is that everything using
          this connector must now be in the EAR with the connector, due to isolation issues.
          -Jason
          Hubert Windl <[email protected]> wrote:
          >My J2EE connector internally uses log4j-1.2.6. Although the log4j.jar
          >file is part of the .rar file and a Class-Path entry has been added
          >to the manifest, I get the following error message when trying to deploy
          >the connector to WLS 7.0: " javax.resource.spi.ApplicationServerInternalException:
          > Error loading class ManagedPayAdvConnectionFactory
          >.. Reason: org/apache/log4j/Logger"
          >
          >Any help is appreciated.

How to use log4j

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