I just created log4j.xml file like ,
<?xml version="1.0" encoding="UTF-8"?>
<log4j:configuration>
<appender name="fileAppender" class="org.apache.log4j.RollingFileAppender">
<param name="Threshold" value="ALL" />
<param name="MaxFileSize" value="512KB" />
<param name="MaxBackupIndex" value="10" />
<param name="File" value="F:/Core_logs/application_log.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{MMM-dd-yyyy HH:mm:ss:SSS} %-5p %m%n"/>
</layout>
</appender>
<!--sets the priority log level for org.springframework -->
<logger name="org.springframework">
<level value="info" />
</logger>
<!--sets the default priority log level -->
<root>
<priority value="all"></priority>
<appender-ref ref="fileAppender" />
</root>
</log4j:configuration>
But I have the exception as ,
java.io.FileNotFoundException: F:\Spring_Core_logs\pointel_Aop.log (The system cannot find the path specified)
If I created a folder Core_logs manually in the particular location means, it works fine and log file created.
How to create the folder , if the folder is not exist in a particular location?
EDIT:
This here could also help you/looks like the best solution for you:
Configuring Java FileHandler Logging to create directories if they do not exist
It seems like log4j version 1.2.15 does it. Look for an answer below from Arun P Johny, he posted a piece of code from the log4j sourcecode. I overlooked it because it was not accepted as an answer.
Log4j.xml file for creating in your eclipse
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">
<appender name="fileAppender" class="org.apache.log4j.FileAppender">
<param name="Threshold" value="INFO" />
<param name="Append" value="true" />
<param name="File" value="logfile.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%c{1}] %m %n" />
</layout>
</appender>
<root>
<level value="INFO"/>
<appender-ref ref="fileAppender"/>
</root>
</log4j:configuration>"UTF-8"?>
Related
I would like to configure the logs for a simple app running in a tomcat and i'd like to send all logs except error level ones to one file, and the errors to other one.
How should i configure the log4j.xml to make it works?
<appender name="regular-container" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="regularLogs.log" />
</appender>
<appender name="error-container" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="errorLogs.log" />
</appender>
<logger name="regular-container">
?????????????????????
</logger>
<logger name="error-container">
?????????????????????
</logger>
Try this log4j.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="true"
xmlns:log4j='http://jakarta.apache.org/log4j/'>
<appender name="errorsOnly" class="org.apache.log4j.RollingFileAppender">
<param name="file" value="errorLogs.log" />
<param name="threshold" value="ERROR" />
</appender>
<appender name="regular" class="org.apache.log4j.RollingFileAppender">
<param name="file" value="regularLogs.log" />
<param name="threshold" value="DEBUG" />
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="errorsOnly" />
<appender-ref ref="regular" />
</root>
</log4j:configuration>
Note that this includes FATAL logging in errorsOnly, though I assume that's okay. Having errorsOnly first with threshold set to ERROR means error level or above are handled by errorsOnly. DEBUG or higher not yet handled by errorsOnly are then handled by regular. I found a similar issue providing another example.
Thanks for answer, but it didnt work. Using filter parameter for each appender, yes.
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="levelMin" value="ERROR" />
<param name="levelMax" value="FATAL" />
</filter>
Problem:
We got 2 logs printed in the file like this:
Analysis
1)These 2 logs are printed one after the other in the code and here too but the time difference is 7 minutes which is huge.
2)This has been observed when there is only one War file as well as multiple wars in the Tomcat.
Below is the log4j configuration file to analyse the issue clearly:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="false">
<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%5p %d{ISO8601} [%t][%x] %c - %m%n" />
</layout>
</appender>
<appender name="callback" class="org.apache.log4j.rolling.RollingFileAppender">
<param name="file" value="${catalina.base}/logs/subs_engine.log" />
<param name="append" value="true" />
<param name="encoding" value="UTF-8" />
<rollingPolicy class="org.apache.log4j.rolling.TimeBasedRollingPolicy">
<param name="FileNamePattern"
value="${catalina.base}/logs/%d{yyyy-MM-dd_HH}_subs_engine.gz" />
</rollingPolicy>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%5p %d{ISO8601} [%t][%x] %c:%L - %m%n" />
</layout>
</appender>
<root>
<priority value="info" />
<appender-ref ref="callback" />
</root>
</log4j:configuration>
Can anyone guide me how to solve or debug this problem:
Is this the problem of log4j?
We are using log4j-1.2.17.jar
#Edit:
Logger.sysLog(LogValues.APP_DEBUG, Utility.class.getName(),"Inside loadHttpReqToBean.");
Logger class Calling syslog method
I have a question on the log4j XML configuration. I want to have a HTMLLayout. But in the generated HTML file, there is no Line No. category. But I want to see it. I searched and it seems like to set LocationInfo to be true. But I don't know how to modify my XML.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >
<log4j:configuration>
<appender name="log" class="org.apache.log4j.FileAppender">
<param name="File" value= "log4j.html"/>
<param name="Append" value= "false" />
<layout class="org.apache.log4j.HTMLLayout"/>
</appender>
<appender name="stdout" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d [%06r] [%F:%L] %-10c %x %m%n" />
</layout>
</appender>
<root>
<priority value="debug"/>
<appender-ref ref="log"/>
<!--appender-ref ref="stdout"/-->
</root>
</log4j:configuration>
In the javadoc 1 of org.apache.log4j.HTMLLayout states:
The LocationInfo option takes a boolean value. By default, it is set to false which means there will be no location information output by this layout. If the the option is set to true, then the file name and line number of the statement at the origin of the log statement will be output.
So, you just need to set it to true. Therefore, the configuration of your appender could be similar to:
<appender name="log" class="org.apache.log4j.FileAppender">
<param name="file" value="log4j.html"/>
<param name="threshold" value="debug"/>
<param name="immediateFlush" value="true"/>
<param name="append" value="false"/>
<layout class="org.apache.log4j.HTMLLayout">
<param name="Title" value="false"/>
<param name="LocationInfo" value="true"/>
</layout>
</appender>
Notes
https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/HTMLLayout.html
DailyRollingFileAppender can be used to generate new log files daily.RollingFileAppender has the implementation to create new log files when the size of the file exceeds a given value.However I need to implement both of these together using log4j.
This is the XML configuration file I've used to generate daily logs.How can I modify it to include the maxsize also??
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="true"
xmlns:log4j='http://jakarta.apache.org/log4j/'>
<appender name="fileAppender1" class="org.apache.log4j.DailyRollingFileAppender">
<param name="append" value="true"/>
<param name="file" value="D:/calculator/logs/log"/>
<param name="DatePattern" value="'_'yyyy-MM-dd" />
<param name="immediateFlush" value="true"/>
<param name="threshold" value="info"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{1}] %m%n%n"/>
</layout>
</appender>
<root>
<priority value="info"></priority>
<appender-ref ref="fileAppender1" />
</root>
</log4j:configuration>
If you want to roll a file after reaches 100KB (e.g.), try to add:
<param name="MaxFileSize" value="100KB"/>
I have a huge code base which serves info requests about colleges. There is a base framework code, and we have some separate packages for college1, college2, etc.,
Whenever there is a request for some info about college X, both framework code and college specific code both are triggered. I want to see logs generated for all requests for Company X to go to one location, and company Y to go to one location.
How do I use JUL or apache's logging.properties file to achieve this ? How do I ensure logs written by common framework libraries for company X go to one location, and logs written by common framework libraries for company Y go to some other location ?
I would have an xml file that contain the appenders to specify what packages go into what log file.
You can then load the xml file in your application entry point. Below is an example I have used in my current project
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- appenders -->
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out" />
<param name="threshold" value="error" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%t] %p %c - %m%n" />
</layout>
</appender>
<appender name="codebaseXAppender" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="codebaseX.log" />
<param name="MaxFileSize" value="10MB" />
<param name="MaxBackupIndex" value="10"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%t] %d %p %c - %m%n"/>
</layout>
</appender>
<appender name="codebaseYAppender" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="codebaseY.log" />
<param name="MaxFileSize" value="10MB" />
<param name="MaxBackupIndex" value="10"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%t] %d %p %c - %m%n"/>
</layout>
</appender>
<!-- Root Logger -->
<root>
<priority value="error" />
<appender-ref ref="console" />
</root>
<!-- Application logger -->
<logger name="com.codebasePackageX" additivity="true">
<level value="info" />
<appender-ref ref="codebaseXAppender" />
</logger>
<!-- Application logger -->
<logger name="com.codebasePackageY" additivity="true">
<level value="info" />
<appender-ref ref="codebaseYAppender" />
</logger>
</log4j:configuration>