appender « log4j « Java Enterprise Q&A

1. Have you seen an appender that would log to separate files based on NDC in Log4j?

We have only a very small number of customers (fewer than 50) and we would like each one to have its own separate log file into which all of its server ...

2. log4j appender threshold and category

Let me preface this question by saying I've exhausted Google, or at least what I've been trying to search for. "log4j threshold", "log4j threshold category", "log4j appender threshold category", etc. ...

3. In memory 'list appender' for log4j

Is there an appender for log4j that only stores a list of the logging events (to be used in unit tests, to verify no error logs were written) ?

4. dynamically creating & destroying logging appenders

I have a legacy PSVM application which I'd like to redirect its logging output to unique files per execution. So, if I invoke it at 10:00, then have it redirect ...

5. Is there a log4j appender that connects with TestNG?

I use log4j and would like log messages that normally end up in my logging facility to appear in the test reports created by TestNG during my unit tests. I think that ...

6. What should I do with custom Log4j appender dependancies

I've written a custom log4j appender that creates a new Solr document for each log entry and I'm having problems deploying it to JBoss. The source is viewable on github ...

7. log4j: different category priority than appender threshold

I've been trying to get this simple use case to work but can't: Define a default Threshold of INFO on a FILE Appender, but define a category with DEBUG level. This ...

8. Log4J SMTP appender issues

I like to use log4j smtp appender and i doubt is it effect to my application memory when it's tries to send too many emails.And where errors located (memory or other) ...

9. log4j multiple levels in multiple appenders

I have two appenders: console, and file I have three packages,, I need all messages (debug and higher) from* to be fed into the file. I want info messages from ...

10. Log4j - Have multiple appenders write to the same file with one that always logs

I have a log4j appender defined like: = DEBUG, filelog

log4j.appender.filelog.layout.ConversionPattern=%d | %m%n
In my class, I get the logger like:
Log logger = LogFactory.getLog(getClass());
This works properly. I want to have a logger ...

11. Exclude a class from a log4j appender

I have a file that looks something like this:, foo-log, bar-log
Usually for classes that match the package structure of I would want the foo-log appender to be used. ...

12. how to Configuration both Appender class in config file using log4j

DailyRollingFileAppender -- day wise rolling, RollingFileAppender -- size wise rolling -- But i want both condition in single Appender

13. using log4j for clearing a file?

im using log4j to write into a file with the following properties file :

log4j.rootLogger=DEBUG, FA

#File Appender
log4j.appender.FA.layout.ConversionPattern= %m%n
My problem is , that in each run of my program , i want to ...

14. Class loggin to multiple log files with log4j

I want my application to log to two files: first one, already exists, and will log everything. The second one only will log conditionally. This is my

log4j.rootCategory=DEBUG, FILE

log4j.appender.FILE.layout.ConversionPattern=%d{dd MMM yyyy ...

15. How to configure a log4j file appender which rolls the log file every 15 minutes

I understand that i can use a DailyRollingFileAppender to roll the log file every month, day, half-day, hour or minute. But how can i configure log4j to roll the log file ...

16. Can I instansiate log4j appender independently

I'd like to implement architecture that the user defines log4j appender through log4j properties as usual but this appender is just a buffer and it delegate the log messages to one ...

17. Can we set the specified appender in in the code

I have several apenders in Is there way to give specified apender for logger call

18. Log4j SMTP Appender

Hi I am a novice and the application I am currently coding for uses struts 1.2 and java. We currently use Log4j for log files but I need to implement SMTP ...

19. Are there any Inject friendly abstractions (bean like factory beans) for Log4j Appenders

I would rather a nice bean factory abstraction so my IOC can inject dependencies to a log4j appender in a type safe manner rather than doing the key=value thing that is ...

20. Can I have more than 1 stanza for the same log file in a jboss-log4j.xml?

I'm working with my first jboss application server and am having some issues with the log files. Currently there is a bug in the software that is constantly streaming errors ...

21. Adding Log4J appenders programmatically

Ok, so I have this stupid library I'm using (documentum DFC), which does a check to see if Logger.getRootLogger().getAllAppenders().hasMoreElements() == false, if so, it resets my rootLogger level to WARN, which ...

22. How to create a own Appender in log4j?

I am new in log4j. Can anyone explain how to create my own Appender? i.e. how to implement the classes and interfaces and how to override it?

23. Is there a Non-blocking NIO version of Socket Appender for Log4j?

I am implementing a logging system for scattered web load testing application. It requires remote agents to send log events to controller frequently (5-10 events per second) with large log messages (100K-500K ...

24. How to Create Binary Log File in Java using Log4J

1.I am able to create log files using FileAppender, RollingFileAppender,etc., Though All belongs to ASCII [anyone can read], but I want to register my logs as Binary File [ non readable], can ...

25. A non-rotating log4j file appender?

We're using Java 6 and the latest version of log4j. We have a system process that rotates logs and so we don't need to use what we currently have ...

What ...

26. Log4j properties for separate appender

I have the log4j logger and need to send the logger named "ThermoCommandLogger" to separate file and nothing anywhere more (not write it to output or standard file). I tried the ...

27. Log4J dailyrolling appender truncates daily files

I'm having this wierd issue with my log4JAppender. Im using a dailyRollingFileAppender and the configuration for the same is as follows:

# Log config for the Web
log4j.appender.aWeb = org.apache.log4j.DailyRollingFileAppender
log4j.appender.aWeb.DatePattern = '.'yyyy-MM-dd'.log'
log4j.appender.aWeb.file = @LOG_DIR@/web.log
log4j.appender.aWeb.layout ...

28. log4j file appender not working

am using log4j-1.2.15.jar for enable logging .and its writing all logs to a file. this is what in my

log4j.rootLogger = DEBUG, fileout
log4j.appender.fileout = log.NewLogForEachRunFileAppender
log4j.appender.fileout.layout.ConversionPattern = %d{ABSOLUTE} %5p %c - %m%n
log4j.appender.fileout.layout = ...

29. What does it means BufferSize in log4j appender?

In org.apache.log4j Class AsyncAppender public void setBufferSize(int size)

Sets the number of messages allowed in the event 
 buffer before the calling thread is blocked (if blocking is true) 
or until messages ...

30. Log4j stops logging in a File(File Appenders) when i open/edit the File?

I use log4j in my java application. My log4j configuration file

Set root logger level. log4j.rootLogger=WARN, logfile log4j.appender.logfile.MaxFileSize=20MB ...

31. Log4J custom appender

I'm writing a custom JMS appender for log4j that publishes to a queue (I know there is one by default, but that one uses a topic). Now, in my configuration file I have this: log4j.appender.jms=JMSQueueAppender log4j.appender.jms.ProviderURL=iiop://localhost:2809 log4j.appender.jms.QueueFactoryName=jms/LoggingCF log4j.appender.jms.QueueName=jms/LoggingQueue log4j.appender.jms.layout=org.apache.log4j.PatternLayout log4j.appender.jms.layout.ConversionPattern=[%C{1}]%-4r [%t] %-5p %c %x - %m%n log4j.rootLogger=DEBUG, jms My appender class extends the Skeleton thing and I have get/setters for the ...

32. log4j SMTP Appender

Hi All, I have already implement log4j for log on console(ConsoleAppender) and also in a separate file(RollingFileAppender) its running fine. Now I want that if any info or fatal occurred then log4j fire a mail to a particular mail id. I am trying this by using SMTP appender as:

33. Log4j tw0 appenders problem

Hi Folks , I have two logging appenders like log4j.appender.application = org.apache.log4j.RollingFileAppender log4j.appender.sql = org.apache.log4j.RollingFileAppender, application, sql question is that in sql appenders i can see the sql debug statements and the same can also been seen in application appenders also , i suspect because com.infy is superclass for com.infy.dao it logs what i need is what sql appenders ...

34. Log4j appender causing problems?

Hello, I'm very new to Java and I have searched the web extensively for a site that could help me along the path to Java mastery (or at least usability), and this one seems like the best bet. On to the problem: I'm having trouble with a program's Log4j initialization, as in, the appenders won't initialize properly. Could this cause a ...

35. log4j multi appender

36. log4j appender question

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 ...

37. 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 ...

38. log4j smtp appender

39. log4j appender

Hi I hope this is the right forum for my question... I use log4j in many clients that logs to central storage. I want that every client that logs will write to his own log file. The log file name will include the host name in the file name. How can I write the file appender configuration that will include the ...

40. [log4j] problem with appender file

Hi i create a new fonctionnality in my web application that needs to write in a specific file some informations. So i create a new appender ..and all it's OK but now i imagiine that someone change the right off my new appender file : for example suppose that the rights are readonly . I supposed that log4j me an IOException ...

41. Log4j, appender and InstantiationException

42. Setting Appender's fields in Apache's Log4J

Hi, In the following code snippet (which is written to create a FileAppender & make log4J log to that file): import org.apache.log4j.*; class sample { .... HTMLLayout layout = new HTMLLayout(); layout.TITLE_OPTION = "DataSE Log"; String logFileName = "Log.txt"; Appender appender = new FileAppender(layout, logFileName, true); appender.immediateFlush = false; appender.bufferedIO = true; appender.bufferSize = 64; Logger logger = Logger.getLogger(); logger.addAppender(appender); ..... ...