I have found a similar question for log4net(log4net one file per run), but i am struggling to convert this to log4j.properties file format. The patters just don't get applied:
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File = logs/log-%d{yy/MM/dd HH:mm:ss}.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n
...
I see what is wrong here, but I don't know how to fix it.
May be this is what you are asking.
http://veerasundar.com/blog/2009/08/how-to-create-a-new-log-file-for-each-time-the-application-runs/
courtesy :Is it possible to configure log4j to create a new file with every run of the application?
You need to use RollingFileAppender with the RollingStyle set to Date. So the config would look something like
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.RollingStyle=Date
log4j.appender.file.DatePattern=yy-MM-dd_HH-mm-ss
log4j.appender.file.StaticLogFileName=false
log4j.appender.file.File=logs/log.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n
I don't think it is possible to use slashes or colons in the date pattern as these are not characters that can occur in a file name.
Note that this will actually create a new log file every second, which doesn't match what you've asked for in the title of your question. If you really want a new log file for every run then you should set the RollingStyle to Once. But in this case your file name will not contain a date pattern.
Try RollingFileAppender
log4j.rootLogger=debug, stdout, file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\\\log4j-application.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
Related
I have a project and I work with threads in this project. I have the log4j file and thanks to this file I can write the logs to a log file but what I want is not to write to a log file.I want separate log files to be kept for each thread and they are not compatible with each other. Is it possible ?
I using this log4j.properties
#log4j.rootLogger = INFO, FILE
log4j.rootLogger = DEBUG, DAILY
# Define the FILE appender
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.R.File=Logfile.log
# Define the layout for FILE appender
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%d{dd MMM yyyy HH:mm:ss,SSS} %t %-5p %c %M %x - %m%n
# Define the DAILY appender
log4j.appender.DAILY=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DAILY.File=Logfile.log
log4j.appender.DAILY.DatePattern='.'yyyyMMdd
# Define the layout for DAILY appender
log4j.appender.DAILY.layout=org.apache.log4j.PatternLayout
log4j.appender.DAILY.layout.conversionPattern=%d{dd MMM yyyy HH:mm:ss,SSS} %t %-5p %c %M %x - %m%n
But I must change this now. For example, I have 2 classes extended from the thread running on the main class. these classes are called foo and bar. I want it to be written to the log file number 1 while the foo class is running, and to the log file number 2 while the bar class is running. What should I do ?
I'm actually on a project using slf4j/log4j.
For that, we use log4j.properties files to configure the logging, especially the DailyRollingFileAppender.
# Root logger option
log4j.rootLogger=INFO, file, stdout
log4j.logger.com.thales.ecosystem=DEBUG,stdout,file
log4j.additivity.com.thales.ecosystem=false
# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
# this is set dynamically
log4j.appender.file.File=${log.basedir}/decoders/nm-flight-decoder.log
log4j.appender.file.DatePattern='.'yyyy-MM-dd
log4j.appender.file.ImmediateFlush=true
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} v${release.version} %-5p %c{1}:%L - %m%n
log4j.appender.file.Append=true
# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} v${release.version} %-5p %c{1}:%L - %m%n
And in code, we use the loggerFactory :
private static final Logger LOGGER = LoggerFactory.getLogger(xxxxxxxx.class);
But we have now to deal with multiple (but limited in number) identical process.
So the question is : how can we have two process (with the same class)
with only one log4j.properties per class, writting on a file each, and keeping the DailyRollingFileAppender ?
Thank's !
Make the file name in the configuration a property, and start each process with a different value for that property.
log4j.appender.file.File=${log.basedir}/decoders/${proc}.log
Start one process with -Dproc=nm-flight-decoder, and the other one with a different value.
(Also, consider upgrading to Log4j2. Log4j 1.2 has been End of Life since summer 2015 (archived here) and is known to be broken on Java 9 (archived here).)
Currently my code is printing logs on the console, yet it's not creating a file with the logs. This is the code of log4j.properties:
log4j.rootLogger=file, stdout
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=C:/logs/logging.log
log4j.appender.file.ImmediateFlush=true
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %L - %m%n
log4j.appender.file.Append=true
log4j.appender.file.Threshold=INFO
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %m%n
It's in the resource folder of my spring application.
And this is where i use it:
public void getPreviousDay() {
PropertyConfigurator.configure("log4j.properties");
logger = Logger.getLogger(LocationScheduler.class);
logger.info("Test");
}
There are couple of changes you need to make to your log4j.properties
First of all log4j.rootLogger specifies Log Level and than the appender. so in your case it has to be
log4j.rootLogger= INFO, file, stdout
Instead of log4j.appender.file=org.apache.log4j.FileAppender use log4j.appender.file=org.apache.log4j.RollingFileAppender in order to get a rollover logfile.
Hope this helps.
EDIT
It seems your program is not able to reach your log4j.properties and the reason is the method you are using for loading it only takes a fully qualified path of the log4j.properties
If you want to load your log4j.properties from classpath use below version:
PropertyConfigurator.configure(ClassLoader.getSystemResource("log4j.properties"));
I am using below log4j.properties. I want to create file minute basis. I checked many post on this same question and tried but it didnt worked for me. I am using log4j first time, Please suggest if I am doing something wrong in properties file.
log4j.rootLogger=debug, stdout, R
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %-5p [%c{1}] %m %n
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=/opt/aTest/log.out
log4j.appender.R.MaxFileSize=100KB
# Keep one backup file
log4j.appender.R.MaxBackupIndex=10
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern="%d %-5p [%c{1}] %m %n
log4j.appender.DailyRoller=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DailyRoller.datePattern='.'yyyy-MM-dd-HH-mm
log4j.appender.DailyRoller.file=/opt/aTest/log.out
log4j.appender.DailyRoller.layout=org.apache.log4j.PatternLayout
log4j.appender.DailyRoller.layout.ConversionPattern=%d{yyyy-MMM-dd HH:mm:ss,SSS} [%t] %c %x%n %-5p %m%n
log4j.appender.LOGFILE=org.apache.log4j.rolling.RollingFileAppender
log4j.appender.LOGFILE.RollingPolicy=org.apache.log4j.rolling.TimeBasedRollingPolicy
log4j.appender.LOGFILE.RollingPolicy.FileNamePattern=/opt/aTest/log_%d{yyyy-MM-dd-HH}.out
I am getting only one log.out file created and for each run log gets appended in same file.
You should try the XML format for configuration; the properties files are hard to understand, easy to get wrong (as you can tell :-)
The problem here is that it's not enough to define an appender, you also have to tell log4j to use it:
log4j.rootLogger=debug, stdout, DailyRoller
Also DailyRoller is a confusing name for a per-minute rolling appender.
I have a problem and an uncertainty relating to using Log4j.
I can't write the log to a file. I only get a warning that says:
log4j:WARN No such property [file] in org.apache.log4j.ConsoleAppender.
Logging to console works fine.
I want to store the log file outside the context root. In this case, would I hard code the absolute path into the properties file? Sorry if that's a dumb question.
Log4j.properties
# Root logger option
log4j.rootCategory=INFO, file, stdout
# Direct log messages to stdout
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=/Users/me/Documents/apache-tomcat-7.0.34/wtpwebapps/my_app/log.txt
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
LogInit.java
String root = Environment.getRootDirectory(getServletContext());
String propertiesUri = root + propertiesUriParameter;
File propertiesFile = new File(propertiesUri);
if (!propertiesFile.exists())
{
System.out.println("Initializing log4j with: " + propertiesUri);
PropertyConfigurator.configure(propertiesUri);
}
Change this from :
log4j.appender.file.File=Users/Me/Documents/apache-tomcat-7.0.34/wtpwebapps/my_app/log.txt
To
log4j.appender.file.File=/Users/Me/Documents/apache-tomcat-7.0.34/wtpwebapps/my_app/log.txt
And make sure below path exists
/Users/Me/Documents/apache-tomcat-7.0.34/wtpwebapps/my_app/
Regards,
Shiva Kumar SS