file 1 « log4j « Java Enterprise Q&A





1. log4j log file names?    stackoverflow.com

We have several jobs that run concurrently that have to use the same config info for log4j. They are all dumping the logs into one file using the same appender. ...

2. Why log4j cannot generate backup files?    stackoverflow.com

I'm running some java processes on Windows 2003 server R2 I'm using Apache log4j-1.2.8. All my processes called via one jar file with different parameter example

    java -jar ...

3. Log4j Logging to a Shared Log File    stackoverflow.com

Is there a way to write log4j logging events to a log file that is also being written to by other applications. The other applications could be non-java applications. What are ...

4. Why are my Log4j log file timestamps out of order, and how do I fix it?    stackoverflow.com

My log4j.xml contains:

<appender class="org.jboss.logging.appender.RollingFileAppender" name="rm">
  ...
  </layout>
My log file shows timestamps that are out of order. Can we display based on timestamp?
2009-02-19 14:47:01,288 DEBUG [com.catalystwms.core.persistence.TransactionContext]  
2009-02-19 14:54:27,429 ...

5. Creating multiple log files of different content with log4j    stackoverflow.com

Is there a way to configure log4j so that it outputs different levels of logging to different appenders? I'm trying to set up multiple log files. The main log ...

6. selecting a log file    stackoverflow.com

We have multiple log files like database log, weblog, quartzlog in our application. Any log from files under package /app/database will go to database log. Any log from files under package /app/offline will ...

7. How do I overwrite a log file in log4j?    stackoverflow.com

I have a log file that has the following appender added to it :


logger.addAppender(new FileAppender(new PatternLayout(),"log.txt"));
the thing is, each time I'm running my application, additional logging information gets appended to the ...

8. How can I get log4j to delete old rotating log files?    stackoverflow.com

How can I get log4j to delete old rotating log files? I know I can set up automated jobs (cron for UNIX and scheduled task for Windows), but I want ...

9. What is the best size for a log file in LOG4J?    stackoverflow.com

I have an application that runs slow. This is because of a huge amount of loggings at DEBUG and INFO levels inside the code. I have made some modifications in the ...





10. Is it possible to configure log4j to create a new file with every run of the application?    stackoverflow.com

For example, the first time I run an application (or immediately after I clear out the /logs directory), I want log4j to write the application's logs to a file called log.0. ...

11. How to write to log files in java?    stackoverflow.com

I have made a java application and wants to generate log files so whenever my client would encounter some problem, he can deliver me those log files so that I can ...

12. Programmatically creating different log files using log4j    stackoverflow.com

I have an automated integration test harness and would like to streamline the logging (which is implemented using log4j) I have a number of high-level tests, each with an id and require ...

13. log4j: rotating log files based on time rather than size    stackoverflow.com

I use log4j with the "RollingFileAppender" to create a log rotation based on a certain size per file. How can I configure it to log to each file for a ...

14. two log4j files for EAR with two modules    stackoverflow.com

I have an EAR that is made up of two modules. Both expose services and share common code. Imagine that the ear has a common.jar shared by a webservices.war and webapp.war. I use ...

15. Plugin version on log4j log file    stackoverflow.com

I'm developing an RCP application and use log4j to generate logs. Whenever an exception is logged, I want to include a line on the log file to identify the application ...

16. red5 v0.9: how can i log information to log file?    stackoverflow.com

I'm reading this tutorial on how to build my project project using eclipse with the red5 eclipse plugin. the problem is that this tutorial is for version 0.6 and i have ...





17. Log4j: rotate the log file even if the file has not changed    stackoverflow.com

i am trying to rotate the log file everyday by using the DailyRollingFileAppender, but i have a problem: the log files are not updated everyday, so it doesn't get rotate when ...

18. How to set log4j with unlimited max file size?    stackoverflow.com

I didn't get a definitive answer to this question by Google'ing, so I pose it to the groupthink masterminds and to ensure that a quality answer can be Google-able in the ...

19. Parse a log4j log file    stackoverflow.com

We have several applications that use log4j for logging. I need to get a log4j parser working so we can combine multiple log files and run automated analysis on them. I'm ...

20. Log4j: One log file per request    stackoverflow.com

We have a weblogic batch application which processes multiple requests from consumers at the same time. We use log4j for logging puposes. Right now we log into a single log file ...

21. What tool is useful for reading log4j log files?    stackoverflow.com

I'm looking for a text editor for reading log4j log files capable of auto-highlighting lines according to the threads that logged them. For example, all the lines which include [pool-1-thread-1] will ...

22. How to mask credit card numbers in log files with Log4J?    stackoverflow.com

Our web app needs to be made PCI compliant, i.e. it must not store any credit card numbers. The app is a frontend to a mainframe system which handles the CC ...

23. Is there a log file analyzer for log4j files?    stackoverflow.com

I am looking for some kind of analyzer tool for log files generated by log4j files. I am looking something more advanced than grep? What are you using for log file ...

24. How to add the time stamp to the log file    stackoverflow.com

ello Everyone, I am new to using apache logger . I have downloaded the log4j-xx and i have the following text configuration file Set root logger level to DEBUG and its only ...

25. How do I make log4j create log files on demand only?    stackoverflow.com

We have a modular application where modules have their own log4j logs (i.e. communication log and error log). The appenders and categories for these are all configured in the core log4j ...

26. Log4j - Logging to multiple log files based on the project modules    stackoverflow.com

Consider this scenario: I have a project with two modules and one common module as below (the package structure):

com.mysite.moduleone
com.mysite.moduletwo
com.mysite.commonmodule
In the above, the commonmodule classes can be used by other two modules. The ...

27. Create a new log file every time my program is run    stackoverflow.com

I am using the Apache commons logging library and log4j to generate my log files. Now I want to create a new file every time I run my program. The current count ...

28. In a distributed environment, how can I configure log4j to log to different files for each JVM instance in the same host?    stackoverflow.com

My application runs on IBM WebSphere 6.1 Network Deployment. The application have several JSP files and Java classes. Today each host have only one JVM instance but my intention is to ...

29. Does log4j uses NIO for writing data to file?    stackoverflow.com

It seems to be pretty fast already and i was just wondering if anyone knows if its using NIO. I tried searching the whole source code for NIO (well, its kind ...

30. log4j stopped logging to the file,    stackoverflow.com

I am using log4j in my java application, but after some time without throwing any exception it stopped logging my log4j configuration is as below.

log4j.rootLogger=INFO,FILE
log4j.appender.FILE=com.test.TestFIleAppender
log4j.appender.FILE.MaxFileSize=20MB
log4j.appender.FILE.MaxBackUpIndex=200
My file appender contains some code to do ...

31. Where can i programatically find where the log4j log files are stored?    stackoverflow.com

Relative paths are used in the log4j.properties file. How can i find the absolute path programatically where logs are stored?

32. Production settings file for log4j?    stackoverflow.com

Here is my current log4j settings file. Are these settings ideal for production use or is there something I should remove/tweak or change? I ask because I was getting all my ...

33. How to configure log4j to only keep log files for the last seven days?    stackoverflow.com

I have the following logging problem with several Java applications using log4j for logging: I want log files to be rotated daily, like

log.2010-09-10
log.2010-09-09
log.2010-09-08
log.2010-09-07
log.2010-09-06
log.2010-09-05
log.2010-09-04
But for data security reasons we are not allowed to ...

34. Is it possible to make log4j display which file it used to configure itself?    stackoverflow.com

Question Is it possible to make Log4J display the full path of the file it used for configuration?


Background I have a love-hate relationship with log4j. In good times, it's great but when ...

35. Managing a Large Number of Log Files Distributed Over Many Machines    stackoverflow.com

We have started using a third party platform (GigaSpaces) that helps us with distributed computing. One of the major problems we are trying to solve now is how to manage our ...

36. Log4j multiple files    stackoverflow.com

I have 2 logging files. I have defined two appenders for the 2 files. In a class, if i need to output few logs to one file, and few to the other, do ...

37. Appending current time to a new log file each time log4j is initialized    stackoverflow.com

Every single time I run my app, I want a new log file to be generated with the time stamp. Something like MyFile-4Nov2010-132122.log. I've seen the use of the DailyRollingFileAppender ...

38. how to create the log4j file and run the programme    stackoverflow.com

Now i am learner to log 4j , pls guide me how to create and the run simple example step by step.

39. Where to keep log files of WAR application?    stackoverflow.com

I'm trying to configure logging for my web application (WAR), in log4j.properties:

log4j.rootCategory=WARN, RF
log4j.appender.RF=org.apache.log4j.RollingFileAppender
log4j.appender.RF.File=???/my-app.log
What file path I should specify for my-app.log? Where to keep this file? Currently I'm deploying my application to ...

40. Log4j setting to NOT create zero-sized log files?    stackoverflow.com

Is there a configuration option for a log4j appender for NOT creating zero-sized log files but create a log file ONLY when something was logged for the first time? So to ...

41. Log4j logging to log4j.log instead of specified filename    stackoverflow.com

I am very new to log4j, so please be gentle. But here is what's happening and I don't know why: it's logging correctly to a file, but the filename of ...

42. Log4j - Log only specified method to file    stackoverflow.com

Using log4j to log specific events (DEBUG, ERROR, FATAL..) having specified in the properties file to log only DEBUG i still end up having other error messages logged in the file. ...

43. Finding Log4J log file    stackoverflow.com

I'm working on a project that uses Log4J via Commons. I'm trying to find the path to the log file, but I'm not finding an appropriate method that will return the logfile ...

44. how to write to a text file using to log4j?    stackoverflow.com

im wondering how to convert the following code to output those lines into a text file , and not to standard output:

import org.apache.log4j.Logger; import org.apache.log4j.PropertyConfigurator; ...

45. How do you create log files in log4j per program execution?    stackoverflow.com

I am currently using the DailyRollingFileAppender Class in log4j to do daily log file appending but I want to have the log files separated in the following format:

DATA.log.<date>_<time>_<random_#>
This should be done ...

46. How to avoid old dates log files(0 bytes) creation every day--Using Log4J API    stackoverflow.com

How to avoid old dates log files(0 bytes) creation every day--Using Log4J API I have been using LOG4j for quiet a long time, but recently found some change in the behaviour of ...

47. Modifying how CompositeRollingAppender renames files    stackoverflow.com

I've seen a lot of questions here on the different appenders log4j has, but none that seem to cover the issue I'm having. Apologies if this is repeated anywhere. I'm using ...

48. multiple unrelated log files with log4j and commons logging    stackoverflow.com

I want my app to have 4 log files. Three of the log files are the typical log4j Info, Warn and Error logs. The 4th log file is completely ...

49. Log4j: One log file per war    stackoverflow.com

Is this possible to set individual log files per war file basis? We have two application 'wars' each pertaining to a specific function and managed by different teams. We want to ...

50. File.delete() returns false    stackoverflow.com

I have created a file from my java programming, and am logging some data use Apache Commons Logging API, specifically the Log4j implementation. After the logging has been done, I am setting ...

51. Creating Different log files using log4j    stackoverflow.com

I am trying to write logs in different files. I want to be able to write into different files from different methods. Say if there is an exception in Method A ...

52. Renaming a Log4J log file during the program run    stackoverflow.com

We're recently switched over to Log4J from JUL (java.util.Logging) because I wanted to add additional log files for different logging levels. We have the option in the program to optionally append a ...

53. log4j: which config file was used?    stackoverflow.com

Using log4j, how can I find out what is the name and path oft the current DOMConfigurator file log4j.xml is used, to reset the file name using the PropertyConfigurator.configureAndWatch method, which ...

54. Looking for a windows bat script to compress and move log4j log files    stackoverflow.com

I have a log4j config that rotates my logs daily. I want to be able to create a script that will compress and move yesterdays log files and move them to ...

55. log4j file renaming strategy    stackoverflow.com

I'm using log4j 1.2.15 and I wonder if someone has a remedy to the annoying file renaming strategy log4j is using. I'll try to explain: I am using the following RollingFileAppender ...

56. Log4j - trouble writing to own log file    stackoverflow.com

Spring 3.0 web app. Have placed the following Log4j properties file in the /WEB-INF/classes directory of the WAR file....

log4j.rootLogger=DEBUG, A1
log4j.appender.A1=org.apache.log4j.FileAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d [%t] %-5p %c - %m%n
log4j.appender.A1.File=C:\\Testing.log  
Have a Form Controller which ...

57. Read a file line by line in reverse order    stackoverflow.com

I have a java ee application where I use a servlet to print a log file created with log4j. When reading log files you are usually looking for the last log ...

58. Can log4j compress a log file after file size pass 2MB    stackoverflow.com

What I want is this: Just like Glassfish 3 server log, if the log file pass certain file size(like 2MB), the log file will automatically zip itself, so that the log ...

59. Log4j with writing in different files    stackoverflow.com

hiho guys i want to ask you for the best practice (according to you) for writing a log in different files, for example i want info severity to be logged in ...

60. Log4j: Log File correct, but Stdout only showing a subset    stackoverflow.com

I have a problem with the configuration of my logging with log4j. All the log messages are shown as expected in the root.log file, but the stdout, however, does only show ...

61. Logging to certain file utilizing log4j (problem with HQ)    stackoverflow.com

EDIT: So it appears that the problem is in the log level of my log handlers/appenders and root logger. Somehow HQ (simply the other app) has it's logs configured to get ...

62. Log4j: How to configure simplest possible file logging?    stackoverflow.com

My story: I want to make as a simple thing as a log4j logger that logs rows to a file. I have found several examples with some functionality, but not a basic ...

63. Two projects | Two log files    stackoverflow.com

Project1 is using classes from project2 and project3. Project 2 and project 3 has seperate log4j.properties file and logging classes (Pro2.java & Pro3.java with info,debug methods) in their src folder. Project1 has a ...

64. Multiple log4j xml files for multiple applications    stackoverflow.com

I have 5 applications which have different log4j xml configuration file. And I want each of them to be configured according to the given file and logs correctly when called from ...

65. Conventions regarding the loading of resource files to a Java project    stackoverflow.com

Given that I'm having issues trying to apply an external log4j configuration via log4j.xml I'm now interested in adopting a convention regarding the loading of resource files to Java projects. Despite ...

66. hostname in file created by log4j    stackoverflow.com

I'm using java 1.4.2 on Linux machine (RHEL 5.4). Our application uses log4j for logging. I want that some appender will create files containing hostname in file name. Hostname should not be ...

67. Best way to parse a log4j file for use in a simile timeline    stackoverflow.com

I need to parse a log4j file that was made by apache into a manner that will give me the "id" and "value" of that id. Im going to then turn ...

68. Parsing a log4j file with Java's Document Builder Factory    stackoverflow.com

Im trying to parse a log4j File using the DBF in java.

<![CDATA[</data><data tag='t-ms'><![CDATA[0]]>]]&gt;
<![CDATA[</data><data tag='mhp-version'><![CDATA[1.0]]>]]&gt;
The above lines are examples of part of the single line that consists of all the data ...

69. Log into an additional file at Apache Karaf    stackoverflow.com

I have a system that uses both Apache Camel and Karaf. I need some specific processor to log into a new log instead of the default one ,karaf.log. I have reached that ...

70. Log4j - log file    stackoverflow.com

Does anybody knows how apache log4j handling with streams ? If it open and close log file for each line or if it simply let open stream and flushing it ? ...

71. Good way Log 4j to write in different files according to module    stackoverflow.com

Hi I have many modules in my application every module has different package. my application suppose to create different files for every module.I am doing this by following ways

<appender name="module1" ...

72. How best to perform search and replace Log4J logging on Java files    stackoverflow.com

I am trying to write a script or a program in Java to find and replace all instances and variants of Log4J into logback / SLF4J. Here are some examples of my ...

73. how to change the log4j log file dynamically?    stackoverflow.com

I want to have a log4j configuration such that the log file name should have like ${System-name}log.log. that is if the application is launched on any system then without changing the ...

74. How you can control the size of a log file?    stackoverflow.com

We normally append in the log file and its obviously neccessary but after a particular file size is achived i want all the previous log to be deleted and new log ...

75. best tool to analyze the event logs or any log(Framework logs) file in windows    stackoverflow.com

I need to analyze the event logs and other logs file of my application.Please suggest me some best freeware tools for this purpose.I am using windows. I tried the Mindtree Insight-UI. but ...

76. Log4j logging to separate files    stackoverflow.com

I have an application that listens on a specific port to do its task. This application can run on multiple instances by specifying different ports in the argument. MyApp-1211.bat contains

java MyApp 1211
MyApp-1311.bat ...

77. LOG4J Load muliple log4j files    stackoverflow.com

I have five different log4j property files in my application for each event. I do not want the application to load the file using DOM or PropertyConfigurator. But I want to ...

78. Does possible with Log4J on each start of application rewrite file?    stackoverflow.com

Possible Duplicate:
How do I overwrite a log file in log4j?
My log file is very big after small running time. And also for debug purposes ...

79. Using MDC in log4j to dynamically name the log file    stackoverflow.com

Is it possible some how to use MDC to name the log file at run time. I have a single web application which is being called by different names at the ...

80. unable to write log on correct file for mulithread?    stackoverflow.com

I have posted question: how to use log4j in Multithread using java?. i got response i tried with one solution, using this solution i have create different log files ...

81. How to check logs in this case ( One log file for all the dates )    stackoverflow.com

How to check logs in this case . Actually from our Application , we are contacting some third party Service (Application ) The way they provided their log file is different . (Only ...

82. Multiple log files using Log4j    coderanch.com

Hello, I want to generate log files based on package structure. Like com.temp.test in test.log ,also I am having a log file at application like app.log . This is my requirement what has been logged in test.log should not be logged in app.log.This is my log4j.properties file. # Log4j configuration file. # Available levels are DEBUG, INFO, WARN, ERROR, FATAL # ...

83. location of log file when using log4j    coderanch.com

84. How to use log4j to log a file whose file name is daily based?    coderanch.com

Hi All, I'm using log4j to do log for the java application, and the logged file name should be automatically changed every day, for example, today's log file should be 12152004test1.log (today is Dec/15), and tomorrow's log will automatically become 12162004test1.log when I start up the application. Could anyone tell me how to set the property about: log4j.rootCategory=DEBUG, MYLOG log4j.appender.MYLOG.File=C:\\tomcat\\webapps\\test\\... Thanks ...

85. log4j config file giving FileNotFoundException    coderanch.com

Hello, 1) Make sure that the file really exists. 2) If it exists then, make sure that you got read permission to read the file, as the PropertyConfigurator() will make the FileInputStream to the corresponding file directly. 3) If you have right access then , write a simple jsp page, to find path of the file. 4) Even it does not ...

86. timestamp is log4j file    coderanch.com

I set the log4j output file format as XML so I have to use "ChainSaw" tool to render it into good format including "date and time" for each log entry. My question is -- if I don't have a tool like ChainSaw, how can I convert the timestamp in a log4j output file into regular date/time. the timestamp looks like "1176393442966", ...

87. Log4j: config file VS code setLevel    coderanch.com

88. log4j refuses to write to file    coderanch.com

Hello. After working in several projects where log4j was in place before i got there, i ended up building a project from scratch that will use log4j. I have as Maven dependency to log4j version 1.2.14. I set up some logging and after reading the online documentation, i ended up copying a log4j.properties file from there. It looks like this: log4j.rootLogger=debug, ...

89. log4j file location    java-forums.org

public static void addCustomAppender(String logId) throws IOException { String logName = logId; //Make sure the logger has not already been added. Logger rootLogger = Logger.getRootLogger(); if (rootLogger.getAppender(logId) != null) return; //Get the FILE appender to find the location of our server.log file. Appender fileAppender = rootLogger.getAppender("FILE"); if (fileAppender != null) { String logFolder = ((RollingFileAppender)fileAppender).getFile(); logFolder = logFolder.substring(1, logFolder.lastIndexOf(File.pathSeparator)); logName = ...

90. Need to create the archieved file for all generated log file using log4j    java-forums.org

Hi, Suppose we have defined following log properties: log4j.appender.rolling=org.apache.log4j.RollingFil eAppender log4j.appender.rolling.File= log4j.appender.rolling.MaxFileSize=10MB log4j.appender.rolling.MaxBackupIndex=10 This will generated the 10 backup log file with each size of 10MB . After all 10 files got generated i will overwrite the last one menas old log got removed. My requirement is after all 10 files got generated, i need to archieved these file ...

92. Log4j - why not logging RuntimeException to the file?    forums.oracle.com

[java] [09 Aug 2010 12:48:23.591] com.mycompany.myproject.views.OutgoingTabView.actionPerformed(OutgoingTabView.java:150) DEBUG: [java] Start signing and uploading M2 documents to the CB (FTP server) ... [java] [09 Aug 2010 12:48:23.607] com.mycompany.myproject.db.DefaultDBStrategy.createM2PackDocuments(DefaultDBStrategy.java:423) TRACE: [java] Start creating m2PackDocuments from DB (from M2 documents with status 0) by SQL query: [java] SELECT * FROM OutDocs WHERE STATUS=0 [java] [09 Aug 2010 12:48:23.622] com.mycompany.myproject.db.DefaultDBStrategy.createM2PackDocuments(DefaultDBStrategy.java:471) TRACE: [java] Success created m2PackDocuments(6) [java] ...

93. Need help in creating two different log file using log4j    forums.oracle.com

try{ int a=2; int b=0; int c = a/b; } catch(Exception e){ log.error("Exception e"); } } } ############################################################ I have to use only log.error and create two log files FILE_ERROR and FILE_EXCEPTION in which the file FILE_ERROR should have only errors and the file FILE_EXCEPTION should contain only exceptions. log.debug,log.info etc cant be used.

94. Log4j logging unnecessary Logs in a file    forums.oracle.com

95. writing to a file using log4j    forums.oracle.com

# Default is to send information messages and above to the console log4j.rootLogger = DEBUG, DailyLogFileAppender # Logger configurations #log4j.logger.com.proquest.services.usage=DEBUG, DailyLogFileAppender log4j.logger.com.proquest.services.UsageLog=INFO, UsageLogFileAppender # Appender configurations # Define an appender which writes to a file which is rolled over daily log4j.appender.DailyLogFileAppender = com.proquest.services.log.PqDailyRollingFileAppenderExt log4j.appender.DailyLogFileAppender.File = logs/usagelogging/usagelogging-error.log log4j.appender.DailyLogFileAppender.DatePattern = '.'yyyy-MM-dd log4j.appender.DailyLogFileAppender.Append = true log4j.appender.DailyLogFileAppender.layout = org.apache.log4j.PatternLayout log4j.appender.DailyLogFileAppender.layout.ConversionPattern=%d{ISO8601} %m%n log4j.additivity.com.proquest.services.usage = false log4j.additivity.com.proquest.services.UsageLog ...

96. log4j - log file location on windows    forums.oracle.com

Hi, I searched for this issue but couldnt find any thread. hope someone can answer. i have a client side swing application run as a jar. every user logs in to a terminal windows server and opens the application there. i want the log file for the application to go at, C:\Documents and Settings\xyz\Logs wher xyz is the user logged in. ...

97. log4j - dynamic file name    forums.oracle.com

Hi I hava some servers that use log4j to log in shared folder. i want that every server will create his own log file with his host name. I'm using log4j.xml to configure the appender and I want to use variable to create dynamic file name. Could it passible? Here is my appender:

98. log4j not outputting to log file in web application    forums.oracle.com

/** * This is the action called from the Struts framework. * @param mapping The ActionMapping used to select this instance. * @param form The optional ActionForm bean for this request. * @param request The HTTP Request we are processing. * @param response The HTTP Response we are processing. * @throws java.lang.Exception * @return */

99. Log4j - logging to multiple files    forums.oracle.com

log4j loggers/categories are additive by default. If you write a message to the "AlternativeLog" logger, log4j will first pass that message to all appenders that are attached to the "AlternativeLog" appender. After that, log4j will pass that same message to all appenders that are attached to any 'parent' loggers/categories. In your example, the only 'parent' logger above the "AlternativeLog" is the ...

100. configure log4j to write to different log files conditionally    forums.oracle.com

Hi folks, Is there is way log4j could be configured to write to multiple log files conditionally? Let me try to explain what i am trying to do. I have two classes DatabaseChecker and FTPChecker extends Checker class. Within Checker class, there is a method logTestResult(CheckerType c, boolean isFailed, int retry, int isMaxRetryExceeded). Depending on the CheckerType(database or FTP), I need ...