Log4j appender

hi,
i have requirement wherein i must have logs generated for each 100 Mb but the rollover must not happen based on teh index. it must happen every 6 hours.
so the logs must be generated as ,
logging.log
logging.log.1
logging.log.2
logging.log.3
logging.log.15
and after 6 hours, the rollover must start again.
i am new to log4j, i want somebody to give some input or any pointerw where i can learn to do this sooner will be appreciated..
thanks,
aravind

I seem to remember that someone contributed a TimeAndSizeRollingAppender to the Apache project. hava a google for it. ;-)

Similar Messages

Reassign stderr/stdout to a Log4J appender.

Does anyone know if there is a 'quick-and-dirty' way to reassign Java stderr and stdout to a Log4J Appender? Both Google and the log4j mailing lists are pretty sparse on this subject...

This is the dirty way of doing it. If anyone knows
the better way please mention it here.This is just putting a band-aid on a wound which will not be cured by a band-aid. It only masks the problem, and may introduce further problems (such as: What if you actually don't want to "log" certain things that were only intended for System.out?)
The better way would be to re-design the code so that it logs messages to loggers rather than writing to System.out.
I suspect the OP and you both know that, but just pointing it out in case.

Log4j, appender and InstantiationException

Hi,
I have written my own appender in an Eclipse project that uses log4j. When I try to use the appender I get the following exception:
log4j:ERROR Could not instantiate class [test.appender.NewFileAppender].
java.lang.InstantiationException: test.appender.NewFileAppender
     at java.lang.Class.newInstance0(Unknown Source)
     at java.lang.Class.newInstance(Unknown Source)
     at org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:329)
     at org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:120)
     at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:629)
     at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:612)
     at org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigurator.java:533)
     at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:417)
     at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:316)
     at org.apache.log4j.PropertyWatchdog.doOnChange(PropertyConfigurator.java:682)
     at org.apache.log4j.helpers.FileWatchdog.checkAndConfigure(FileWatchdog.java:88)
     at org.apache.log4j.helpers.FileWatchdog.<init>(FileWatchdog.java:57)
     at org.apache.log4j.PropertyWatchdog.<init>(PropertyConfigurator.java:674)
     at org.apache.log4j.PropertyConfigurator.configureAndWatch(PropertyConfigurator.java:382)
     at se.micronic.argos.main.Main.initLogging(Main.java:305)
     at se.micronic.argos.main.Main.<init>(Main.java:272)
     at se.micronic.argos.main.Main.main(Main.java:1339)
log4j:ERROR Could not instantiate appender named "argos".My property file looks like this:
log4j.appender.argos=test.appender.NewFileAppender
log4j.appender.argos.file=logs/MArgos.logThe other appenders in the property file work fine.
Any ideas?
Thanks
Markus

could be you don't have a no-args constructor? show us the NewFileAppender class
is that the entire stack trace? there's no other underlying exception being thrown?

Log4j appender question

I need some log4j help. Hope anyone can help me.
Question 1:
I need to log information to 4 different files. As far as I can tell from the log4j docs, I will then need to create 4 different appenders in the log4j.properties file. How can I do that?
Looking at examples, it looks like I will need to add 4 new sections similar to this one. Is that correct?
# Logfile 1
log4j.appender.log1=org.apache.log4j.RollingFileAppender
log4j.appender.log1.File=C:/Sun/logs/logme1.log
Question 2:
After that is done, how can I actually write to the files? When logging I was thinking just using: logger.info("log something").
How can I specify which file that will log to? Is that even the correct way to log?
Hope someone can help!

After that is done, how can I actually write to the files? When logging I
was thinking just using: logger.info("log something").
How can I specify which file that will log to? Is that even the correct
way to log?apperantly, it doesn't seem like you have understand how log4j works. that's probably why warnerja tell you to perform some search.
understand the technology first..then ask specific question here.
it will be useless just handling out answers to everyone. i think they're here just not to provides answers, but to educate other along the way...but they need to see an effort was made first.
you're right..there are time when one doesn't have enough time to understand the whole technology..or the technology is too difficult to comprehend..or the documentation is poor., but i think there are plenty of good documentation on log4j. Futhermore..what you are asking is not usually shown in the documentation, but a google search would probably provides you with the answer you seek..you just need to find a good keyword.
Futhermore, I suggest you read some tutorial on log4j if you plan to use the technology..it will not takes all day..maybe an hour or so..just to get how the technology works
anyway,
your appender tell the logger where the log the message to (depends on the level you specified) .. so if you have 3 appender that specified
the level to be INFO, and you have logger.info("This is an INFO message"), then the message will be log to all three files.
log4j.threshold=ALL
log4j.rootLogger=ALL, stdout, DebugAppender, InfoAppender,
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%c %d{ISO8601} -- %p -- %m%n
log4j.logger.DebugAppender.access=DEBUG
log4j.appender.DebugAppender=org.apache.log4j.RollingFileAppender
log4j.appender.DebugAppender.File=.${file.separator}log${file.separator}ex_debug.log
log4j.appender.DebugAppender.MaxFileSize=10KB
log4j.appender.DebugAppender.MaxBackupIndex=1
log4j.appender.DebugAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.DebugAppender.layout.ConversionPattern=%c %d{ISO8601} -- %p --
%m%n
log4j.logger.InfoAppender.access=INFO
log4j.appender.InfoAppender=org.apache.log4j.RollingFileAppender
log4j.appender.InfoAppender.File=.${file.separator}log${file.separator}ex_info.log
log4j.appender.InfoAppender.MaxFileSize=10MB
log4j.appender.InfoAppender.MaxBackupIndex=2
log4j.appender.InfoAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.InfoAppender.layout.ConversionPattern=%c %d{ISO8601} -- %p -- %m%nthe
log4j.rootLogger=
tell what appender to use...so include all your appender in this property.
you appender specified the logging level INFO, WARN, DEBUG,
ERROR, or FATAL. I'm not sure how to specified the min and max level
for an appender using a property file..for xml configuartion file..look at
the example provide in previous reply.
now if you do :
logger.info("This is an info message") and want it to log to file1 and file2
and log.info("This is another info message") and you want this to log to file3
you can't do that...a way around this is to create your own level..and the
appender will specifies that level.
if you plan to use an XML configuration file, then make sure you include the <root> node
<root>
   <priority value="debug"/>
   <appender-ref ref="DEBUG"/>
   <appender-ref ref="INFO"/>
   <appender-ref ref="MY_APPENDER_NAME"/>
</root>
</log4j:Configuration>

LOG4J Appender to Webservices

Hello,
I have a question.
Is there an LOG4J Appender to Webservices?
I founded a lot of kinds of appenders on www.apache.org, but nothing about webservices.
Thanks for any help!!

Thanks. I'm using a startup class. I could easily check if log4j is in the server classpath, and attach my appender. However, if log4j is not in server classpath, and in the application classpath, I need to check for this. I was using ApplicationContainerFactory in weblogic 8 like so:
appContainerFactory.getApplicationContainer(applicationName).getApplicationClassLoader()
which is not available in weblogic 9. And I can't find in the docs anywhere to indicate it's replacement, or any type of alternative.

Regsitering log4j appender to a logger in a class in a web app

During weblogic 9.2 server startup I would like to register a Handler with any number of log4j Loggers in all deployed web apps. I was thinking I could somehow get a reference to the applications classloader, and see if it has log4j, then register with the root logger. I used to do this in WLS 8, using ApplicationContainerFactory, but this is no longer available in WLS 9. Is there another way to do this in WLS 9? Thank for any help.

Thanks. I'm using a startup class. I could easily check if log4j is in the server classpath, and attach my appender. However, if log4j is not in server classpath, and in the application classpath, I need to check for this. I was using ApplicationContainerFactory in weblogic 8 like so:
appContainerFactory.getApplicationContainer(applicationName).getApplicationClassLoader()
which is not available in weblogic 9. And I can't find in the docs anywhere to indicate it's replacement, or any type of alternative.

JMX-Log4j Appender problem

Dear listers
we wrote thefollowing code to log the loglevel's dynamically.
Following is the code
public class MyApp implements MyAppMBean {
private static Logger logger = Logger.getLogger(MyApp.class);
public void go() throws Exception{
while(true){
logger.debug("DEBUG") ;
logger.info("INFO") ;
logger.warn("WARN");
logger.error("ERROR");
logger.fatal("FATAL");
Thread.sleep(2000);
public void setLoggingLevel(String level){
logger.info("Setting logging level to: " + level);
Level newLevel = Level.toLevel(level, Level.INFO);
Logger.getRootLogger().setLevel(newLevel);
public String getLoggingLevel(){
return Logger.getRootLogger().getLevel().toString() ;
public static void main(String[] args) throws Exception
DOMConfigurator.configure("log4j.xml");
MyApp app = new MyApp();
//Lookup for the mbean server
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
//Create and register the top level log4j MBean
HierarchyDynamicMBean hdm = new HierarchyDynamicMBean();
ObjectName mbo = new ObjectName("log4j:logger=root");
System.out.println("Debug10");
server.registerMBean(hdm, mbo);
LoggerRepository r = LogManager.getLoggerRepository();
Enumeration<Logger> elogs = r.getCurrentLoggers();
Logger logger = null;
while(elogs.hasMoreElements())
//need to show the elements of teamcenter only.
logger = (Logger)elogs.nextElement();
hdm.addLoggerMBean(logger.getName());
} System.out.println(Logger.getRootLogger().getLevel().toString());
int portNumber=9999;
ObjectName htmlName = new ObjectName("log4j:logger=root,port=" + portNumber) ;
HtmlAdaptorServer html = new HtmlAdaptorServer(portNumber);
html.setPort(portNumber);
server.registerMBean(html, htmlName);
html.start();
app.go();
When setting the attributes for the appenders under log4j from htmladapter it gives the following message.
*477 All Attributes Not Set*
*1/8 attribute(s) were not set:*
appender%3DTaskAppender%2Clayout%3Dorg.apache.log4j.PatternLayout
Please advice how can we solve this issue ~Vilas

Dear listers
we wrote thefollowing code to log the loglevel's dynamically.
Following is the code
public class MyApp implements MyAppMBean {
private static Logger logger = Logger.getLogger(MyApp.class);
public void go() throws Exception{
while(true){
logger.debug("DEBUG") ;
logger.info("INFO") ;
logger.warn("WARN");
logger.error("ERROR");
logger.fatal("FATAL");
Thread.sleep(2000);
public void setLoggingLevel(String level){
logger.info("Setting logging level to: " + level);
Level newLevel = Level.toLevel(level, Level.INFO);
Logger.getRootLogger().setLevel(newLevel);
public String getLoggingLevel(){
return Logger.getRootLogger().getLevel().toString() ;
public static void main(String[] args) throws Exception
DOMConfigurator.configure("log4j.xml");
MyApp app = new MyApp();
//Lookup for the mbean server
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
//Create and register the top level log4j MBean
HierarchyDynamicMBean hdm = new HierarchyDynamicMBean();
ObjectName mbo = new ObjectName("log4j:logger=root");
System.out.println("Debug10");
server.registerMBean(hdm, mbo);
LoggerRepository r = LogManager.getLoggerRepository();
Enumeration<Logger> elogs = r.getCurrentLoggers();
Logger logger = null;
while(elogs.hasMoreElements())
//need to show the elements of teamcenter only.
logger = (Logger)elogs.nextElement();
hdm.addLoggerMBean(logger.getName());
} System.out.println(Logger.getRootLogger().getLevel().toString());
int portNumber=9999;
ObjectName htmlName = new ObjectName("log4j:logger=root,port=" + portNumber) ;
HtmlAdaptorServer html = new HtmlAdaptorServer(portNumber);
html.setPort(portNumber);
server.registerMBean(html, htmlName);
html.start();
app.go();
When setting the attributes for the appenders under log4j from htmladapter it gives the following message.
*477 All Attributes Not Set*
*1/8 attribute(s) were not set:*
appender%3DTaskAppender%2Clayout%3Dorg.apache.log4j.PatternLayout
Please advice how can we solve this issue ~Vilas

Log4j appender pipelining

Hi there,
Can I pipeline log4j appenders? Essentially, I have a custom AsyncAppender which I want feeding into DailyRollingFileAppender for file rollover purposes.
How can I do that?
Kind Regards,
Zalle

Hi there,
Can I pipeline log4j appenders? Essentially, I have a custom AsyncAppender which I want feeding into DailyRollingFileAppender for file rollover purposes.
How can I do that?
Kind Regards,
Zalle

Log4j is not picking up an appender

I configured a logger "mailLogger" in the properties file, and I defined an appender "mail".
In the code, I get the logger by name, and list all the appenders.
It tells me there are no appenders.
Shouldn't the "mail" appender be added by putting it in log4j.properties?
My log4j properties file:
log4j.rootLogger=INFO, xmlout
log4j.logger.mailLogger=ALL, mail
log4j.appender.xmlout=biz.minaret.log4j.DatedFileAppender
log4j.appender.xmlout.threshold=DEBUG
log4j.appender.xmlout.Directory=/app/usrlogs
log4j.appender.xmlout.Prefix=sfgpo.
log4j.appender.xmlout.Suffix=.log
log4j.appender.xmlout.Append=true
log4j.appender.xmlout.layout=org.apache.log4j.xml.XMLLayout
log4j.appender.mail=org.apache.log4j.net.SMTPAppender
log4j.appender.mail.To=[email protected]
log4j.appender.mail.From="SFG Application Mailer"
log4j.appender.mail.SMTPHost=myhost.myorg.com
log4j.appender.mail.Threshold=ERROR
log4j.appender.mail.BufferSize=1
log4j.appender.mail.Subject=SFG PO event notice
log4j.appender.mail.layout=com.moodys.sfg.utility.logger.MoodysHTMLLayout
log4j.additivity.mailLogger=true
log4j.appender.mail.layout.LocationInfo=true
My java code:
import java.util.Enumeration;
import org.apache.log4j.Appender;
import org.apache.log4j.Logger;
import org.apache.log4j.net.SMTPAppender;
Logger logger = Logger.getLogger("mailLogger");
Enumeration en = logger.getAllAppenders();
System.out.println("Listing all appenders for the logger");
while (en.hasMoreElements())
     Appender a = (Appender)en.nextElement();
     String apName = a.getName();
     System.out.println(" Appender: name = " + apName);
System.out.println("End of appender list");
The console output is:
Llisting all appenders for the logger
End of appender list
Why does it not find my appender "mail"?
Thanks in advance.
Elliot

Hi Elliot.
I had the same trouble and I resolved when I commented out the "rootLogger line", as follow below:
# disabling line
# log4j.rootLogger=INFO, xmlout
I hope that helps you.
Gui Pereira.

Want to append time stamp to file name in log4j property

Hi
I want to append the timestamp to name of log file.
here i am attaching my sample log4j.property file
plase heple me for correct syntax
log4j.logger.bar=DEBUG, dest1
log4j.appender.dest1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.dest1.layout=org.apache.log4j.PatternLayout
log4j.appender.dest1.file=log.log
#log4j.appender.dest1.append=true
log4j.appender.dest1.datePattern='.'yyyyMMdd
log4j.appender.dest1.layout.ConversionPattern= %d{dd-MMM-yyyy HH:mm:ss aaa} [%3p] %n%m%n%n
log4j.appender.dest1.encoding=UTF-8
log4j.logger.foo=DEBUG, A2
log4j.appender.A2=org.apache.log4j.RollingFileAppender
log4j.appender.A2.layout=org.apache.log4j.PatternLayout
log4j.appender.A2.File=example1.{timestamp}.log
#log4j.appender.A2.append=true
log4j.appender.A2.layout.ConversionPattern= %d{dd-MMM-yyyy HH:mm:ss aaa} [%3p] %n%m%n%n
#log4j.appender.A2.datePattern='.'yyyyMMdd
log4j.appender.A2.encoding=UTF-8

Is your google broken?
http://www.google.com/search?q=log4j+timestamp+syntax+examples

Log4j file appender

Hi,
I am using log4j for logging. I am working on a huge application and there would be lots of logs each day. Thereby it is requried that the log files be stored and renamed each day. The date is appended to the log file and that day's log file is stored. The logs start writing afresh each day. The problem here is that at times the application simply starts logging to the previous day's log file, for a while, and then starts writing back to the current day's file again. I am not able to figure out what goes wrong and when. The application is running on weblogic. Can anybody please help? The log4j properties file is here....
# DO NOT MODIFY
log4j.categoryFactory=com.myapp.util.logger.LoggerCategoryFactory
log4j.rootCategory=INFO,DISABLED
# EVENTS
log4j.category.nmy.STATE=INFO,0,DAY,OBS
log4j.category.nmy.EXCEPTION=DEBUG,10,DAY
log4j.category.nmy.SESSION=INFO,0,DAY
log4j.category.nmy.REQUEST=INFO,0,DAY
log4j.category.nmy.MESSAGE=INFO,0,DAY
log4j.category.nmy.OBJECT=INFO,0,DAY
log4j.category.nmy.DATA=INFO,0,DAY
log4j.category.nmy.NONE=DEBUG,5,DAY
# DO NOT MODIFY
log4j.appender.DISABLED=com.myapp.util.logger.NullAppender
# STANDARD OUTPUT DRIVER SETTINGS
log4j.appender.CON=org.apache.log4j.ConsoleAppender
log4j.appender.CON.Target=System.out
log4j.appender.CON.layout=com.myapp.util.logger.LoggerLayout
log4j.appender.CON.layout.ConversionPattern=+{DATE_TIME};{EVENT_ID};{SESSION_ID};{SEVERITY};{MODULE};{THREAD_ID};{EVENT_TYPE};{ERROR_CODE};{DESCRIPTION};{DEBUG_INFO}
# ROLLING FILE OUTPUT DRIVER SETTINGS
log4j.appender.ROL=org.apache.log4j.RollingFileAppender
log4j.appender.ROL.File=/var/opt/apps/myapp/var/logs/application.log
log4j.appender.ROL.MaxFileSize=4000KB
log4j.appender.ROL.MaxBackupIndex=5
log4j.appender.ROL.layout=com.myapp.util.logger.LoggerLayout
log4j.appender.ROL.layout.ConversionPattern=+{DATE_TIME};{EVENT_ID};{SESSION_ID};{SEVERITY};{MODULE};{THREAD_ID};{EVENT_TYPE};{ERROR_CODE};{DESCRIPTION};{DEBUG_INFO}
# DAILY OUTPUT DRIVER SETTINGS
log4j.appender.DAY=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DAY.File=/var/opt/apps/myapp/var/logs/daily_application.log
log4j.appender.DAY.DatePattern='.'yyyy-MM-dd
log4j.appender.DAY.layout=com.myapp.util.logger.LoggerLayout
log4j.appender.DAY.layout.ConversionPattern=+{DATE_TIME};{EVENT_ID};{SESSION_ID};{SEVERITY};{MODULE};{THREAD_ID};{EVENT_TYPE};{ERROR_CODE};{DESCRIPTION};{DEBUG_INFO}
# ===========================================================================
# SIMPLE FILE OUTPUT DRIVER SETTINGS WITH DEBUG_INFO
log4j.appender.FIL=org.apache.log4j.FileAppender
log4j.appender.FIL.File=/var/opt/apps/myapp/var/logs/fil_application.log
log4j.appender.FIL.Append=false
log4j.appender.FIL.layout=com.myapp.util.logger.LoggerLayout
log4j.appender.FIL.layout.ConversionPattern=+{DATE_TIME};{EVENT_ID};{SESSION_ID};{SEVERITY};{MODULE};{THREAD_ID};{EVENT_TYPE};{ERROR_CODE};{DESCRIPTION};{DEBUG_INFO}
# ===========================================================================
# DAILY OBSERVATION FILE OUTPUT DRIVER SETTINGS
log4j.appender.OBS=org.apache.log4j.DailyRollingFileAppender
log4j.appender.OBS.File=/var/opt/apps/myapp/var/logs/obslog.out
log4j.appender.OBS.DatePattern=.yyyyMMdd
log4j.appender.OBS.layout=com.myapp.util.logger.LoggerLayout
log4j.appender.OBS.layout.ConversionPattern={DESCRIPTION}
# log4j.appender.OBS.layout.ConversionPattern=+{DATE_TIME};{EVENT_ID};{SESSION_ID};{SEVERITY};{MODULE};{THREAD_ID};{EVENT_TYPE};{ERROR_CODE};{DESCRIPTION};{DEBUG_INFO}
Regards...

I found from the log4j 1.3 API javadoc, the DailyRollingFileAppender is deprecated. They use the RollingFileAppender instead and give one sample .
Hope it helps!
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration>
<log4j:configuration debug="true">
<appender name="ROLL" class="org.apache.log4j.rolling.RollingFileAppender">
<rollingPolicy class="org.apache.log4j.rolling.TimeBasedRollingPolicy">
<param name="FileNamePattern" value="/wombat/foo.%d{yyyy-MM}.gz"/>
</rollingPolicy>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%c{1} - %m%n"/>
</layout>
</appender>
<root">
<appender-ref ref="ROLL"/>
</root>
</log4j:configuration>

Log4j question about closed appender error

Hi all,
In my company's project, we have used the log4j 1.1.3 for logging. Since in the project, there are a few applications. We have a common properties to state the log4j properties for AppSTDERR(console), AppLogFile and AppNTEventLog. And we also have a properties file for each application. In each proeprties file, we state a different path to the AppLogFile for different application. We use PropertyConfigurator.configure() to configure the properties and use Category.getRoot(). However, sometimes some application's log will log to another application log file. So we decide to change the application properties file like this:
log4j.category.AppXXX=DEBUG, AppXXXSTDERR, AppXXXLogFile
log4j.appender.AppXXXLogFile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.AppXXXLogFile.File=C:\\xxx\\xxx.log
log4j.appender.AppXXXLogFile.layout=org.apache.log4j.PatternLayout
log4j.appender.AppXXXLogFile.layout.ConversionPattern=%d{ISO8601} [%-5p] [%t] %m%n
log4j.appender.AppXXXSTDERR: org.apache.log4j.ConsoleAppender
log4j.appender.AppXXXSTDERR.layout: org.apache.log4j.PatternLayout
log4j.appender.AppXXXSTDERR.layout.ConversionPattern: %d{ISO8601} [%-5p] [%t] - %m%n
We don't use Category.getRoot() and use Category.getInstance("AppXXX") instead. But we sometimes get these errors on console:
log4j:ERROR Attempted to append to closed appender named [AppSTDERR].
log4j:WARN Not allowed to write to a closed appender.
log4j:ERROR Attempted to append to closed appender named [AppLogFile].
log4j:WARN Not allowed to write to a closed appender.
We don't know what is the problem. We guess that some common programs will log common messages to AppLogFile and AppSTDERR but we do not open the AppLogFile and AppSTDERR in each application. Is that we have to use Category.getRoot() ?
Anybody help?
Raymond

Do you not need a DatePattern value for the DailyRollingFileAppender? DatePattern being the variable that determines WHEN the logs are rolled.
If not specified what is the default value? Could not setting this value result in strange behavior?
These are shots in the dark I know but we are having similar issues. I can't find any documentation on what the default value is of DatePattern if not specified and have no idea what happens if no value is set. At any rate we are going to supply a value for DatePattern and see if it fixes our problem, I'll post the resutls.

Log4j Logger and File appender

I have a problem with my logger file. It look like this :
# appender "file" writes to a file
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.File=src/logs/test.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
log4j.appender.file.threshold=DEBUG
The problem is when I write to the logfile test.log. The contents of the previous "run" is still there. What I want to achieve, is whenever I run my application, only the content of that "run" should be present on the logfile.
What to add ?
Cheers !

It works fine now. I only had to add the line :
log4j.appender.file.append=false
so now it look like :
# appender "file" writes to a file
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.File=src/logs/babel.log
log4j.appender.file.append=false
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
log4j.appender.file.threshold=DEBUG

Log4J - file appender (2/more file for same package/class)

Hi All,
My requirement is i want to create 2 log file for same package.
EG: com.foo.bar
my code:
log4j.rootCategory= ALL, fileAppender,stdout
log4j.appender.fileAppender=org.apache.log4j.RollingFileAppender
log4j.appender.fileAppender.File=c:\\temp\\test.log
log4j.appender.fileAppender.MaxFileSize=64KB
log4j.appender.fileAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.file1=org.apache.log4j.RollingFileAppender
log4j.appender.file1.File= file1.log
log4j.appender.file1.MaxFileSize=64KB
log4j.appender.file1.MaxBackupIndex=1
log4j.appender.file1.layout=org.apache.log4j.PatternLayout
log4j.appender.file1.layout.ConversionPattern=%p %t %c - %m%n
log4j.appender.file2=org.apache.log4j.RollingFileAppender
log4j.appender.file2.File= file2.log
log4j.appender.file2.MaxFileSize=64KB
log4j.appender.file2.MaxBackupIndex=1
log4j.appender.file2.layout=org.apache.log4j.PatternLayout
log4j.appender.file2.layout.ConversionPattern=%p %t %c - %m%n
log4j.appender.file3=org.apache.log4j.RollingFileAppender
log4j.appender.file3.File= file3.log
log4j.appender.file3.MaxFileSize=64KB
log4j.appender.file3.MaxBackupIndex=1
log4j.appender.file3.layout=org.apache.log4j.PatternLayout
log4j.appender.file3.layout.ConversionPattern=%p %t %c - %m%n
// THIS IS FOR ClIENT
log4j.logger.com.ls.es.service=DEBUG, file1
// THIS IS FOR SUPPORT
log4j.logger.com.ls.es.service=DEBUG, file2
// THIS IS ERROR MESSAGE
log4j.logger.com.ls.es.service=ERROR, file3
Here file1 is for Client(Client Admin)and file2 is for Support.
but am getting only file3.log file which is for Error Message..
some where configuration is missing...
Thanks,
by
dhana

I have created a class that allow to create easily new logs:
1.- Switch the Root Logger output
2.- Create as many logs as desired (I build a simple web server, each new client has a log associated to it).
Main problem: code and comments in spanish.
Are you intereseted on it? Let me know, I can send it to you by mail.
Cesar

Log4J Asynchronous appender

hi
any one can help me how can i use " Log4J Asynchronous appender" in my project.
cureently i am using Log4J appender for logging using the property files

Your question is a bit hard to understand, but if you mean you have the configuration of Log4J in property files today (using PropertyConfigurator) there is no way to use the AsyncAppender.
The AsynAppender ( [http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/AsyncAppender.html] ) requires xml configuration (DOMConfigurator):
Important note: The AsyncAppender can only be script configured using the DOMConfigurator. - Roy

Log4j appender

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