I have an RollingFile Appender defined in my log4j2.xml.
<RollingFile name="RollingFile" fileName="/logs/app.log"
filePattern="logs/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz">
<PatternLayout>
<Pattern>%d{HH:mm:ss.SSS} - %-5p - %m - [%l]%n</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="10 MB" />
</Policies>
<DefaultRolloverStrategy max="20" />
</RollingFile>
What I want to do is to pass this parameter to the JVM at startup:
-Dapp_home=/home/admin/server
The documentation is pretty straight forward. And from what I understand it should work like this:
<RollingFile name="RollingFile" fileName="${jvmrunargs:app_home}/logs/app.log"
But it doesn't. I verified that it is working in general by using the absolut path.
In an other application where I use log4j (1.x) it works like this:
log4j.appender.file.File=${app_home}/logs/app.log
Take a look at the System Properties Lookup section of the documentation. If you define a variable as system property using -D like this:
-Dapp_home=/home/admin/server
use
${sys:app_home}
in your Log4j 2 configuration to access it.
Related
Is there any way to change the location of the log file for one particular appender of log4j in a Storm cluster environment?
Suppose I want to keep all logger files of RollingFileInfoappender at /logs/storm directory.
Yes, sure. You can add a log4j2.xml file to your resources-folder and specify the appenders as you like.
For instance:
<RollingFile name="mylog"
fileName="path/to/log.file"
filePattern="path/to/log.file.%i.gz"
append="false"
createOnDemand="true">
<PatternLayout>
<pattern>${patternNoTime}</pattern>
</PatternLayout>
<Policies>
<SizeBasedTriggeringPolicy size="100 MB"/>
</Policies>
<DefaultRolloverStrategy max="4"/>
</RollingFile>
I have simple question.
How to have log file name dynamically supplied from code?
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn" name="MyApp" packages="">
<Appenders>
<RollingFile name="RollingFile" fileName="${logfilename}.log"
filePattern="logs/$${date:yyyy-MM}/app-%d{yyyy-MM-dd-HH}-%i.log.gz">
<PatternLayout>
<Pattern>%d %p %c{1.} [%t] %m%n</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy interval="6" modulate="true"/>
<SizeBasedTriggeringPolicy size="250 MB"/>
</Policies>
</RollingFile>
</Appenders>
<Loggers>
<Root level="error">
<AppenderRef ref="RollingFile"/>
</Root>
</Loggers>
Here file name is logs/app.log.
How to make it dynamic with date and time appended as well in file name? Though pattern is applied but it doesn't work.
Here logs is the directory which log4j library automatically creates, can it be dynamic as well?
EDIT In parameter fileName I have placed ${logfilename}.log and setting system property as below:
System.setProperty("logfilename", "a_cool_logname");
Now it is creating file with name ${logfilename}.log which is definitely not required.
Thanks
**Property File Look like this **
log4j.rootLogger=DEBUG, FA
#Console Appender WE WRE NOT USING IT
log4j.appender.CA=org.apache.log4j.ConsoleAppender
log4j.appender.CA.layout=org.apache.log4j.PatternLayout
log4j.appender.CA.layout.ConversionPattern=%d{dd MM yy HH:mm} %-5p %m%n
#File Appender
log4j.appender.FA=org.apache.log4j.FileAppender
log4j.appender.FA.File=${fName}
#log4j.appender.FA.MaxFileSize=5MB
#log4j.appender.FA.MaxBackupIndex=3
log4j.appender.FA.layout=org.apache.log4j.PatternLayout
log4j.appender.FA.layout.ConversionPattern=%d{dd MM yy HH:mm} %8p %10m%n
# Set the logger level of File Appender to WARN
log4j.appender.FA.Threshold = INFO
log4j.appender.FA.Threshold = DEBUG
**And set Properties in JAVA **
System.setProperty("fName", "d:\\siemens\\" + getDateTime() + c.getSimpleName() +".log");
PropertyConfigurator.configure("log4j.properties");
let me know if u need further query thanks
Sometimes, while rolling log files, there seems to be some issue occurring like: 'Unable to delete log file', 'Unable to move log file'.
Error: java.nio.file.FileSystemException a.log -> directory\a-2011-08-09-2.log: The process cannot access the file because it is being used by another process.
Following is the log4j configuration:
<RollingFile name="a" fileName="${sys:catalina.base}/logs/a.log" append="true" createOnDemand="true" filePattern="${sys:catalina.base}/logs/a-%d{yyyy-MM-dd}-%i.log">
<PatternLayout>
<Pattern>%d{ISO8601}|%-5p|%i|%T|%s|%R|%t|%c{1} - %m%n</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="10MB"/>
</Policies>
<DefaultRolloverStrategy max="25"/>
</RollingFile>
I use log4j2 to log my programs. In my xml configuration file, I have this appender:
<RollingFile name="General" fileName="log/logs/giornale.log" filePattern="log/logs/log-%d{yyyyMMdd}.log">
<PatternLayout>
<Pattern>%d{HH:mm:ss,SSS} [%t] %-5level %logger{-1} - %msg%n</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
</Policies>
</RollingFile>
What I need is a way to configure it, so that it will delete automatically all files older than n days.
I already found some questions like this, but they don't help, since they don't say how to do it via xml configuration.
To make it short, where exactly am I suppose to indicate parameters like "MaxBackupIndex" in the above snippet? Or which other parameter should I use (and where can I put it)?
Add the following tag under 'RollingFile' tag. Remove the 'policies' tag. You probably don't need it.
<DefaultRolloverStrategy>
<Delete basePath="log/logs" maxDepth="2">
<IfLastModified age="60d" />
</Delete>
</DefaultRolloverStrategy>
With this configuration, logs older than 60 days will be auto-deleted.
Refer to the log4j2 docs for more configuration information.
You can add the DefaultRolloverStrategy to your xml as -
<RollingFile name="General" fileName="log/logs/giornale.log" filePattern="log/logs/log-%d{yyyyMMdd}.log">
<PatternLayout>
<Pattern>%d{HH:mm:ss,SSS} [%t] %-5level %logger{-1} - %msg%n</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
</Policies>
<DefaultRolloverStrategy max="<specify maximum archive count>"/>
</RollingFile>
As well you can use the combination of time and size based roll over for logs using -
<Policies>
<TimeBasedTriggeringPolicy interval="6" modulate="true"/>
<SizeBasedTriggeringPolicy size="250 MB"/>
</Policies>
..a sample configuration that uses a RollingFileAppender with both the
time and size based triggering policies, will create up to 7 archives
on the same day (1-7) that are stored in a directory based on the
current year and month, and will compress each archive using gzip and
will roll every 6 hours when the hour is divisible by 6
I have this appender
<RollingFile name="Application" fileName="/home/user/log/abc.log" filePattern="/var/log/mylog/abc-%d{yyy-MM-dd}-%i.log.gz">
<PatternLayout>
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} abc %-10level %class{36} %L %M - %msg%xEx%n</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="5 MB" />
</Policies>
<DefaultRolloverStrategy max="9999"/>
</RollingFile>
when the 5 MB are reached and there is no space on /var/log/mylog I get the error "ERROR renaming file from xx to yy If I make space afterwards, the logger does not try again to rename the file. Any ideas how I could solve that?
I use log4j2 2.2
This is not an answer. I don't have enough reputation to make a comment.
SUGGESTION: Log4j2 allows you to automatically delete files older then X days. I've been struggling with this some time ago. The issue has been resolved here:
Log4j2 - Configure RolloverStrategy to delete old log files
Maybe this will be helpful for you.
If you configure a FailoverAppender and put your RollingFileAppender within it then you can configure the FailoverAppender to retry at an interval you configure. In the meantime, the log events can be routed to a secondary appender that can do something else. See http://logging.apache.org/log4j/2.x/manual/appenders.html#FailoverAppender.
try removing ":" here {yyyy-MM-dd HH:mm:ss.SSS}
something like below
<PatternLayout>
<Pattern>%d{yyyy-MM-dd} abc %-10level %class{36} %L %M - %msg%xEx%n</Pattern>
</PatternLayout>