I am using log4j2 to send logs to syslog using syslog appender in log4j2.xml file. The problem that I am facing is that the first word in the log message is truncated. You can use two formats in syslog appender RFC 5424 and BSD. When I use BSD, then the first word in the message is truncated. When I use RFC 5424, then there is too much unwanted information printed. Here is my log4j2.xml file. In this case I am using BSD format as it defaults to BSD. I don't know why or how it truncates the first word.
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="info">
<Appenders>
<Console name="LogToConsole" target="SYSTEM_OUT">
<PatternLayout pattern="%d{[yyyy-MM-dd HH:mm:ss+SS:SS]} [%-5p] %m%n"/>
</Console>
<Syslog name="syslogAppender" host="localhost" port="514" protocol="UDP"
facility="LOCAL0" id="myApp" />
</Appenders>
<Loggers>
<Root level="ALL">
<AppenderRef ref="syslogAppender"/>
<AppenderRef ref="LogToConsole" />
</Root>
</Loggers>
</Configuration>
Output in log file:
[2021-04-09T18:01:02+00:00][info] unavailiblity window to station
Expected Output:
[2021-04-09T18:01:02+00:00][info] Sending unavailiblity window to station
I am not sure what the problem is. If I use RFC 5424 then it prints too much unwanted information and I have no way to format it the way I want it. With RFC 5424 format, it produces the following output:
[2021-04-09T15:52:37+00:00][info] 2021-04-09T15:52:37.912Z ip-172-31-28-58 /home/user 24253 - - Sending unavailability window to station
I want to use the simple format. The BSD format works for me only if it does not truncate the first word.
Thanks
PatternLayout is the problem, use any other layout like RFC5424Layout etc
I have a spring boot application and using log4j2 to generate console and persists logs in a centos linux.
I wanted to maintain only 5mb of log files in archive.
But the problem is, my archived log files are 5mb in total. but my main console log which is saving in the main log file i.e wc-notification.out is going beyond 1mb.
so my disk gets full and it causes an issue.
The brute force method solution is:
whenever restarting(hard stop and start) my spring boot application, the log is cleared in from wc-notification.out.
my log4j2 configuration xml file:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO" monitorInterval="30">
<Properties>
<Property name="LOG_PATTERN">
[ %d{yyyy-MMM-dd HH:mm:ss a} ] - [%t] %-5level %logger{36} - %msg%n
</Property>
</Properties>
<Appenders>
<Console name="ConsoleAppender" target="SYSTEM_OUT" follow="true">
<PatternLayout pattern="${LOG_PATTERN}"/>
</Console>
<RollingFile name="FileAppender" fileName="/home/ec2-user/apps/wc-notification-service/wc-notification.out"
filePattern="/home/ec2-user/apps/wc-notification-service/archives_test/wc-notification.out-%d{yyyy-MM-dd}-%i">
<PatternLayout>
<Pattern>${LOG_PATTERN}</Pattern>
</PatternLayout>
<Policies>
<SizeBasedTriggeringPolicy size="1MB" />
</Policies>
<DefaultRolloverStrategy>
<Delete basePath="logs" maxDepth="1">
<IfFileName glob="wc-notification.out-*.log" />
<IfLastModified age="1m" />
</Delete>
</DefaultRolloverStrategy>
</RollingFile>
</Appenders>
<Loggers>
<Root level="info">
<!--<AppenderRef ref="ConsoleAppender" /> -->
<AppenderRef ref="FileAppender" />
</Root>
</Loggers>
</Configuration>
somehow, the files are in range of 1mb, and the roll strategy is working, it is deleting the file
but, my disk space is still occupied with the space. what can be the reason?
As you are providing your own log4j2.xml configuration file, you are overwriting the Spring Boot default logging configuration, and it is safe to assume that it will be configuration used by Log4j2.
Your configuration is almost correct. If you want to achieve the desired behavior, I would suggest you the following changes:
Be aware that you are pointing your Delete action basePath to the wrong location, it should point to the directory in which your logs are stored.
The IfFileName glob pattern is wrong as well, it should match your logs filenames.
Finally, your are using the IfLastModified condition. As its name implies, this condition has to do with the last modification date of the logs files, not with their size. Please, consider to use instead IfAccumulatedFileSize (or maybe IfAccumulatedFileCount). See the relevant documentation.
For these reasons, your logs are not being deleted correctly and the disk space occupied is greater than the desired amount. Without deletion, your log files are being rotated every 1 MB as configured by your SizeBasedTriggeringPolicy, and will keep until the value of the max attribute of DefaultRolloverStrategy, 7 by default, is reached, and always, plus the amount of your current log file.
In summary, please, try a configuration like this:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO" monitorInterval="30">
<Properties>
<Property name="LOG_PATTERN">
[ %d{yyyy-MMM-dd HH:mm:ss a} ] - [%t] %-5level %logger{36} - %msg%n
</Property>
</Properties>
<Appenders>
<Console name="ConsoleAppender" target="SYSTEM_OUT" follow="true">
<PatternLayout pattern="${LOG_PATTERN}"/>
</Console>
<RollingFile name="FileAppender" fileName="/home/ec2-user/apps/wc-notification-service/wc-notification.out"
filePattern="/home/ec2-user/apps/wc-notification-service/wc-notification.out-%d{yyyy-MM-dd}-%i">
<PatternLayout>
<Pattern>${LOG_PATTERN}</Pattern>
</PatternLayout>
<Policies>
<SizeBasedTriggeringPolicy size="1MB" />
</Policies>
<DefaultRolloverStrategy>
<Delete basePath="/home/ec2-user/apps/wc-notification-service">
<IfFileName glob="wc-notification.out-*" />
<IfAccumulatedFileSize exceeds="5 MB" />
</Delete>
</DefaultRolloverStrategy>
</RollingFile>
</Appenders>
<Loggers>
<Root level="info">
<!--<AppenderRef ref="ConsoleAppender" /> -->
<AppenderRef ref="FileAppender" />
</Root>
</Loggers>
</Configuration>
The solution relies in storing all your logs in the same location. It will affect your RollingFile filePattern attribute.
Please, be careful with the delete action, it can delete not only your log files, but all that matches your glob pattern.
In addition, although maybe irrelevant fo your use case, be aware that if the filePattern of your archive files ends with ".gz", ".zip", ".bz2", among others, the resulting archive will be compressed using the compression scheme that matches the suffix, which can allow you to store more archives for the same space if required.
For your comments, it seems you encountered a problem when using large file sizes: please, see this bug, I think that clearly describes your problem.
My best advice will be to reduce the size of the logs files to one that it is properly working, or try a more recent version of the library.
I am aware that you are using Spring Boot to manage your dependencies:
please, verify your maven tree and see the actual version library you are using and change it if necessary.
You need to leverage the DeleteAction of the RollingFileAppender. I would recommend taking a look at the documentation as there are a lot of good examples.
The reason for your behavior is as follows: look at your parameters
appender.gateway.policies.size.size=1MB
appender.gateway.strategy.type = DefaultRolloverStrategy
appender.gateway.strategy.max = 5
What you are asking here is log file should be allowed to grow up to 1M. Once it reaches 1M size it is copied to file logfile.log-1 and a new file logfile.log is created. As the files get produced you required that you want to keep only 5 last files. The older files get deleted automatically. So it looks like the behavior is exactly as you configured. What you can do is to configure to keep more than 5 files back and possibly in a different folder where you have sufficient space.
Just for information to people who are facing similar issue, i just changing my logging mechanism to logback. it works like an charm and have no issue.
the reference link which i used: spring boot with logback
First time trying to use log4j version log4j-1.2.17.jar.
On an existing application the client has log4j in place and there is a log4j.properties file which specifies a light log output. What I want to do is depending on the log level (ERROR & WARN) output a more refined entry.
On the log4j site I came across this but I think it is to be in some .xml file. I need some assistance in understanding how I can put in place the formatting option to alter based on log level.
You don't need to declare separate loggers to achieve this. You can set the logging level on the AppenderRef element.
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<File name="file" fileName="app.log">
<PatternLayout>
<Pattern>%d %p %c{1.} [%t] %m %ex%n</Pattern>
</PatternLayout>
</File>
<Console name="STDOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%m%n"/>
</Console>
</Appenders>
<Loggers>
<Root level="trace">
<AppenderRef ref="file" level="DEBUG"/>
<AppenderRef ref="STDOUT" level="INFO"/>
</Root>
</Loggers>
</Configuration>
Would I put this xml content into the web.xml file or another file?
a) If another file what file name and where would it go?
How do I get log4j to realize that I need it to use the xml file?
Will the use of the xml ignore the log4j.properties file?
I know it is a lot of questions but there is only me on the project and the client has a production crisis that needs to be figured out today so I don't have time to go off to read and do tutorials with the client calling me every hour. I figured it may help to get this logging more useful. As the logs are right now I have a date and message output to the log but no idea where the entries are created from without doing extensive searches through the code.
You could do this by defining multiple non-additive Loggers so that the first one only logs errors, the next one warnings and the final one infos and debug.
I'm using Log4J 2.0 to create logs for a project that I'm doing. The logs are small and I have a requirement to maintain them for 3 months. I'd like to have the current month's log with 3 archives (each containing a month's worth of logs).
The problem that I need help with is configuring log4j to rotate the logs at the beginning of the month (or the end of the month).
Pretty much every thing that I've found researching this problem is for log4j 1.x and talks about a datePattern parameter that doesn't appear to exist in 2.0.
Here's my log4j2.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<configuration status="warn" name="NKMS" packages="">
<appenders>
<FastRollingFile name="LogFile" fileName="logs/Tier2HttpServer.log" filePattern="logs/app-%d{yyyy-MM-dd}.log.gz">
<ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
<PatternLayout pattern="%d %p %c{1.} [%t] %m%n"/>
<Policies>
<TimeBasedTriggeringPolicy/>
<SizeBasedTriggeringPolicy size="250 MB"/>
</Policies>
<DefaultRolloverStrategy max="4"/>
</FastRollingFile>
<Console name="STDOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
</Console>
</appenders>
<loggers>
<logger name="mil.navy.nrl.itd.xml_filter" level="trace"/>
<root level="trace">
<appender-ref ref="STDOUT"/>
<appender-ref ref="LogFile"/>
</root>
</loggers>
</configuration>
I'm writing INFO and above to the log file and debug to the console (for now). The files are written to just fine, but they appear to rollover daily (which appears to be the default).
I've tried changing the FastRollingFile:filePattern to "'.'yyyy-MM" but that causes weird things to happen (only a single entry is written to file and an archive is immediately created).
I downloaded the source for log4j-2.0-beta8 and the PatternProcessor parses a RolloverFrequency that contains the enum RolloverFrequency.MONTHLY, but there again, I can't figure out how to implement / use it.
As always, any assistance or advice that you can provide would be GREATLY APPRECIATED!
-Ace
You may have found a bug. I would expect the filePattern of "logs/app-%d{yyyy-MM}.log.gz" to give you what you're looking for.
To clarify my understanding of the problem: The initial log event immediately triggers a rollover (creating an archive file). Instead, it should collect log events into the log file and not roll over until the end/beginning of the month. Is that description correct? Is there any other issue in addition to this initial unnecessary rollover?
Could I ask you to raise a JIRA ticket for this? https://issues.apache.org/jira/browse/LOG4J2
I need to configure logger to roll the logs by time (hourly or daily), by size and on start. I searched a lot and red log4j docs, now i am confused.
Looks like it can be done by following ways:
using Simon library
creating custom classes
using log4j 2 beta
I can't add new 3rd party libs to my project (log4j 2 beta is already added) so i consider the last two options.
What exactly classes should i create if i go with the 2nd option? Should it be appender, rollingPolicy or triggeringPolicy?
Will log4j2 really support that?
Thanks for help, Yuri
I don't think you need to create any classes, you should be able to achieve what you want with configuration only. The Log4J2 documentation provides a number of examples.
Here is a good place to start: http://logging.apache.org/log4j/2.x/manual/appenders.html#RollingFileAppender
If this is not sufficient, don't hesitate to ask a question on the log4j-2 user mailing list.
Config example:
<?xml version="1.0" encoding="UTF-8"?><configuration name="install" status="info">
<appenders>
<!-- ################# InstallAppender ############################### -->
<RollingFile name="InstallAppender"
fileName="${sys:installation.path}/installation/logs/post_install.log"
filePattern="${sys:installation.path}/installation/logs/post_install.log">
<PatternLayout>
<pattern>%d{dd/MM/yyyy HH:mm:ss} %-5p [%t] [%c{1}] %m%n</pattern>
</PatternLayout>
<Policies>
<OnStartupTriggeringPolicy/>
</Policies>
<DefaultRolloverStrategy max="1"/>
</RollingFile>
</appenders>
<loggers>
<root level="info">
<appender-ref ref="InstallAppender"/>
</root>
</loggers>