Develop Reference

Why wasn't log message written my log file when running Junit tests?

I have a class Store which contains statements like "log.info(...)". I can see the log messages with the log file created when running the program. However, when I run JUnit tests, the log file won't be created, but I still want to see log messages. The logger is:
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
And my log4j properties:
log4j.rootLogger=DEBUG, STDOUT, file
log4j.appender.STDOUT=org.apache.log4j.ConsoleAppender
log4j.appender.STDOUT.layout=org.apache.log4j.PatternLayout
log4j.appender.STDOUT.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=mylogs.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{dd-MM-yyyy HH:mm:ss} %-5p %c{1}:%L - %m%n
The questions is, how to also create the log file and log messages when running my Junit tests?
Edit:
Part of the test log property:
log4j.rootLogger=ERROR, Console
log4j.logger.play=DEBUG
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d{ABSOLUTE} %-5p ~ %m%n
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=testlog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{dd-MM-yyyy HH:mm:ss} %-5p %c{1}:%L - %m%n

According to that configuration, you'd probably expect to have a testlog.log file in the root of your project.
Nonetheless, the file appender is not referenced so the messages will only be logged using the Console appender. However, your rootLogger is set to ERROR level so messages below this level, such as DEBUG, INFO or WARN will be discarded.
You can either change your rootLogger configuration, from which all non-explicitly configured loggers inherit, just like in your other log4j.properties, or define a logger for your package, setting it to DEBUG (or whatever level you want) and use both the appends: log4j.logger.my.package.here=DEBUG, Console, file.
Further reading resources:
- log4j v1.2 into
- log4j 1.2 configuration
P.S.: Please note that sometimes Eclipse has issues with the file-system changes and does not automatically update the project files. If that happens. after running your test, try right clicking your project in the Navigator view, and selecting refresh, then scroll to the end where your pom is. Alternatively open the file explorer of your choice, go to your project root on the disk and you should see the testlog.log file.

how to seprate the jetty.logs from solr.logs?

I using jetty as my container and I set up solr inside it, I using log4j.properties for my logging,when I used jetty standalone I can see my jetty logs ,but when I using solr an d log4j I only see solr.log file that all my jetty and solr logs are mixed in it,and my jetty.logs file created at the same time but it is empty,how can I separate the solr and jetty logs?
this is my log4j.properties:
# Logging level
solr.log=logs
log4j.rootLogger=INFO, file, CONSOLE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%-4r [%t] %-5p %c %x [%X{collection} %X{shard} %X{replica} %X{core}] \u2013 %m%n
#- size rotation with log cleanup.
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.MaxFileSize=4MB
log4j.appender.file.MaxBackupIndex=9
#- File to log to and log format
log4j.appender.file.File=${solr.log}/solr.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%-5p - %d{yyyy-MM-dd HH:mm:ss.SSS}; [%X{collection} %X{shard} %X{replica} %X{core}] %C; %m\n
log4j.logger.org.apache.zookeeper=WARN
log4j.logger.org.apache.hadoop=WARN
#set to INFO to enable infostream log messages
log4j.logger.org.apache.solr.update.LoggingInfoStream=OFF

This is how you can separate Solr and Jetty logs and write them into separate files using additivity:
log4j.additivity.org.apache.solr=false
log4j.additivity.org.eclipse=false
log4j.logger.org.apache.solr=INFO, SOLR
log4j.logger.org.eclipse=INFO, JETTY

log4j File appender not working with eclipse

I have a webservice program which has multiple classes talking to each other.
After running the program using tomcat in eclipse, I copy the wsdl url in soap UI to test it out and if there's any exception then it has to be in printed in a log file as I am file appender logic from log4j. Spent almost three days with no luck
Here is log4j.properties file:
# Define the root logger with appender file
log4j.rootLogger = DEBUG, FILE, theConsoleAppender
log4j.category.com.wataniya.Wataniya_WebServiceSkeleton=DEBUG, FILE
### direct log messages to stdout ###
log4j.appender.theConsoleAppender=org.apache.log4j.ConsoleAppender
log4j.appender.theConsoleAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.theConsoleAppender.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
# Define the file appender
log4j.appender.FILE=org.apache.log4j.FileAppender
# Set the name of the file
log4j.appender.FILE.File=log.txt
# Set the immediate flush to true (default)
log4j.appender.FILE.ImmediateFlush=true
# Set the threshold to debug mode
log4j.appender.FILE.Threshold=debug
# Set the append to false, overwrite
log4j.appender.FILE.Append=true
# 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} %c %p %t %m%n%n

Imported the required jar files in to build path in eclipse. More info can be found at this link in importing the jar files and configuring the properties file: Link

Log4j in tomcat not showing logs

This is my log4j.properties.
# Root logger option
log4j.rootLogger=INFO, file, stdout
# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=${catalina.home}\MyLog\PmcDemo.log
log4j.appender.file.MaxFileSize=1MB
log4j.appender.file.MaxBackupIndex=1
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
# 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} %-5p %c{1}:%L - %m%n
I am using tomcat 6.0, in my application I have used Logger from log4j yet I don't see any output on server console or in the log file. My application is using struts2 as front end, Spring framework as middle layer and hibernate as the end layer. I don't see my application logging how can I enable it in tomcat 6?

You need to switch the backslashes for forward slashes:
${catalina.home}/MyLog/PmcDemo.log
or to escape them
${catalina.home}\\MyLog\\PmcDemo.log
If that doesn't help, let us know the structure of your project and where the log4j.properties file is stored.

Try this steps,
If running Tomcat 6.x:
1. If you have not already done so, modify the <<TOMCAT_HOME>>/conf/catalina.properties file so that the shared classloader mechanism work the same as Tomcat 5.x.
2. To do this, verify that the entry beginning with shared.loader= reads shared.loader=${catalina.base}/shared/classes,${catalina.base}/shared/lib/*.jar If running Tomcat 5.x or higher:
If running Tomcat 5.x or higher:
3. If it does not already exist, create a "shared/classes" directory under <<TOMCAT_HOME>>.
4. If it does not already exist, create a "shared/lib" directory under <<TOMCAT_HOME>>.
5. Copy log4j-###.jar into <<TOMCAT_HOME>>/shared/lib.
**Note:** Any specific version of log4j-###.jar should work. You can download the stable log4j version 1.2 installation from http://logging.apache.org/log4j/1.2/download.html
6. Copy a log4j.properties file into <<TOMCAT>>/shared/classes.
Example
To get a log file named "initiate.log" to show up in the <<TOMCAT_HOME>>/logs directory, an initial version of log4j.properties file is:
log4j.rootLogger=ERROR, R
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
# Pattern to output the caller's file name and line number.
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=${catalina.home}/logs/initiate.log
log4j.appender.R.MaxFileSize=1000KB
log4j.appender.R.MaxBackupIndex=5
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d{ABSOLUTE} 5-5p %c{2} - %m %n
log4j.logger.org.springframework=ERROR
log4j.logger.org.springframework.web.servlet.mvc=ERROR
#set to DEBUG to see hibernate and connection-pool logging output
log4j.logger.org.hibernate=ERROR
log4j.logger.org.apache.commons.dbcp=ERROR
#set to DEBUG to see Initiate-specific logging output
log4j.logger.com.initiatesystems=DEBUG
#set to DEBUG to set Initiate-specific verbose logging output
log4j.logger.verbose=ERROR
Quoted from: http://pic.dhe.ibm.com/infocenter/initiate/v9r5/index.jsp?topic=%2Fcom.ibm.datatrust.doc%2Ftopics%2Ft_datatrust_configuring_log4j_logging_apachetomcat.html

log4j API to log errors

I am running REST web service on Tomacat 6.0.32. I am using log4j API to log errors or anything else.
Basically you only need to include this line of code
static Logger logger = Logger.getLogger(TestLogging.class.getName());
logger.debug("String blah blah");
I run main method to test if it is working. So, the program writes log info into text file and on the console of NetBeans.
But if you deploy the project and then run it on the browser those logs do not appear no where; neither on console nor text file nor on Tomcat's logs.
The following is properties file:
# Set root category priority to DEBUG and set its only appender to A1
log4j.rootCategory=DEBUG, A1, file
log4j.additivity.logger=false
# A1 is set to be a ConsoleAppender (writes to system console).
log4j.appender.A1=org.apache.log4j.ConsoleAppender
# A1 uses PatternLayout.
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%p [%t] %F %L %x - %m%n
#### Second appender writes to a file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=eMart_logger.log
# Control the maximum log file size
log4j.appender.file.MaxFileSize=1MB
# Archive log files (one backup file here)
log4j.appender.R.MaxBackupIndex=1
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%p %d %t %F %L - %m%n
What is the problem?
Cheers

Use a FileAppender to get it to log to a file when you are running on a server.
http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/FileAppender.html