I've written a wrapper around Flyway I call Nomad. I am well pleased with Flyway, save the incessant logging it performs outside of Maven. I created an issue here. Each user of Nomad must make their own configuration of log4j to silence Flyway. This is problematic if not done, for instance, during Spec testing. However, getting the configuration just right is a challenge and, moreover, having to do this breaks the abstraction of my library.
My question is this: how can I permanently silence flyway so that any user of Nomad is not burdened with the task? I've found that this log4j.xml sometimes works:
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ISO8601} %t %-5p %c{1} - %m%n"/>
</layout>
</appender>
<logger name="org.springframework" additivity="false">
<level value="error"/>
<appender-ref ref="console"/>
</logger>
<root>
<priority value="error"/>
<appender-ref ref="console"/>
</root>
</log4j:configuration>
This stifles Flyway to the point of being helpful, rather than overly chatty. The misdirection is still broken, but not often.
The way you have done it in log4j.xml seems good. I don't see anything wrong.
Since the project uses Maven, I recommend you adding a property file instead log4j.properties, that you place that in src/main/resources
The contents can be:
log4j.rootCategory=DEBUG, stderr
log4j.appender.stderr=org.apache.log4j.ConsoleAppender
log4j.appender.stderr.target=System.err
log4j.appender.stderr.layout=org.apache.log4j.PatternLayout
log4j.appender.stderr.layout.ConversionPattern=[%d] %-5p %c %x: %m%n
# Silence springframework messages.
org.springframework=ERROR
Perhaps that will work better with you. It becomes easier to manage too.
Flyway's only non-logging framework dependency is Spring. As Mohamed Mansour pointed out you can suppress all but the ERROR messages with a simple Log4J configuration setting.
For Spring (as pointed out by Mohamed Mansour):
org.springframework=ERROR
For Flyway:
com.googlecode.flyway=ERROR
Related
I have configured logback xml for a spring boot project.
I want to configure another appender based on the property configured. We want to create an appender either for JSON logs or for text log, this will be decided either by property file or by environment variable.
So I am thinking about the best approach to do this.
Using filters to print logs to 1 of the file (either to JSON or to Txt). But this will create both of the appenders. I want to create only 1 appender.
Use "If else" blocks in logback XML file. To put if else around appenders, loggers seems untidy and error prone. So will try to avoid as much as possible.
So now exploring options where I can add appender at runtime.
So I want to know if it is possible to add appender at runtime. And will it be added before spring boots up or it could be done anytime in the project.
What could be the best approach to include this scenario.
As you're already using Spring, I suggest using Spring Profiles, lot cleaner than trying to do the same programmatically. This approach is also outlined in Spring Boot docs.
You can set an active profile from either property file:
spring.profiles.active=jsonlogs
or from environment value:
spring_profiles_active=jsonlogs
of from startup parameter:
-Dspring.profiles.active=jsonlogs
Then have separate configurations per profile:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="stdout-classic" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{dd-MM-yyyy HH:mm:ss.SSS} %magenta([%thread]) %highlight(%-5level) %logger{36}.%M - %msg%n</pattern>
</encoder>
</appender>
<appender name="stdout-json" class="ch.qos.logback.core.ConsoleAppender">
<encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
<layout class="ch.qos.logback.contrib.json.classic.JsonLayout">
<timestampFormat>yyyy-MM-dd'T'HH:mm:ss.SSSX</timestampFormat>
<timestampFormatTimezoneId>Etc/UTC</timestampFormatTimezoneId>
<jsonFormatter class="ch.qos.logback.contrib.jackson.JacksonJsonFormatter">
<prettyPrint>true</prettyPrint>
</jsonFormatter>
</layout>
</encoder>
</appender>
<!-- begin profile-specific stuff -->
<springProfile name="jsonlogs">
<root level="info">
<appender-ref ref="stdout-json" />
</root>
</springProfile>
<springProfile name="classiclogs">
<root level="info">
<appender-ref ref="stdout-classic" />
</root>
</springProfile>
</configuration>
As the previous answer states, you can set different appenders based on Spring Profiles.
However, if you do not want to rely on that feature, you can use environments variables as described in the Logback manual. I.e.:
<appender name="json" class="ch.qos.logback.core.ConsoleAppender">
<encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
<layout class="ch.qos.logback.contrib.json.classic.JsonLayout">
<jsonFormatter class="ch.qos.logback.contrib.jackson.JacksonJsonFormatter">
<prettyPrint>true</prettyPrint>
</jsonFormatter>
<appendLineSeparator>true</appendLineSeparator>
</layout>
</encoder>
</appender>
<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>
%cyan(%d{HH:mm:ss.SSS}) %gray([%thread]) %highlight(%-5level) %magenta(%logger{36}) - %msg%n
</pattern>
</encoder>
</appender>
<root level="info">
<!--
! Use the content of the LOGBACK_APPENDER environment variable falling back
! to 'json' if it is not defined
-->
<appender-ref ref="${LOGBACK_APPENDER:-json}"/>
</root>
I have a Spring web app running on Wildfly 8.* and for some reason it won't print to the console. I see all the console logs and stack traces fine but the System messages just don't appear.
The problem might be with my log4j setup so I'll post that config;
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration PUBLIC
"-//APACHE//DTD LOG4J 1.2//EN" "http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/doc-files/log4j.dtd">
<log4j:configuration debug="true"
xmlns:log4j='http://jakarta.apache.org/log4j/'>
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="console" />
</root>
</log4j:configuration>
I've ran apps on JBoss 7.1 before however without this problem so I'm really at a loss on what could be wrong.
Feel free to ask about any of my other config not sure what would be needed.
Edit:
logger.org.jboss.as.config.level=DEBUG
logger.org.jboss.as.config.useParentHandlers=true
logger.jacorb.config.level=ERROR
logger.jacorb.config.useParentHandlers=true
logger.org.apache.tomcat.util.modeler.level=WARN
logger.org.apache.tomcat.util.modeler.useParentHandlers=true
logger.com.arjuna.level=WARN
logger.com.arjuna.useParentHandlers=true
handler.CONSOLE=org.jboss.logmanager.handlers.ConsoleHandler
handler.CONSOLE.level=INFO
handler.CONSOLE.formatter=COLOR-PATTERN
handler.CONSOLE.properties=autoFlush,target,enabled
handler.CONSOLE.autoFlush=true
handler.CONSOLE.target=SYSTEM_OUT
handler.CONSOLE.enabled=true
handler.FILE=org.jboss.logmanager.handlers.PeriodicRotatingFileHandler
handler.FILE.level=ALL
handler.FILE.formatter=PATTERN
handler.FILE.properties=append,autoFlush,enabled,suffix,fileName
handler.FILE.constructorProperties=fileName,append
handler.FILE.append=true
handler.FILE.autoFlush=true
handler.FILE.enabled=true
handler.FILE.suffix=.yyyy-MM-dd
handler.FILE.fileName=C\:\\wildfly-8.2.0.Final\\standalone\\log\\server.log
formatter.PATTERN=org.jboss.logmanager.formatters.PatternFormatter
formatter.PATTERN.properties=pattern
formatter.PATTERN.pattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} %-5p [%c] (%t) %s%E%n
formatter.COLOR-PATTERN=org.jboss.logmanager.formatters.PatternFormatter
formatter.COLOR-PATTERN.properties=pattern
formatter.COLOR-PATTERN.pattern=%K{level}%d{HH\:mm\:ss,SSS} %-5p [%c] (%t) %s%E%n
Here is my logging config in my standalone deployments folder.
I had a log4j.properties file at the root level of the .war (WEB-INF/classes) from years ago that caused the same issue - deletion fixed it
Since you are using a logging framework, there are 2 ways to fix it:
Remove the logging framework and all the configuration files (why would I do that)
Move your log4j.properties file from src/main/resources to WEB-INF folder.
Quoting: JBoss Docs, Section 'Per Deployment Logging'
Per-deployment logging allows you to add a logging configuration file to your deployment and have the logging for that deployment configured according to the configuration file. In an EAR the configuration should be in the META-INF directory. In a WAR or JAR deployment the configuration file can be in either the META-INF or WEB-INF/classes directories.
The following configuration files are allowed:
logging.properties
jboss-logging.properties
log4j.properties
log4j.xml
jboss-log4j.xml
I usually have trouble configuring logs per deployment in wildfly, but you can use the logging system from wildfly, changing logging configuration of your standalone ou domain config files to this would do the trick:
<root-logger>
<level name="TRACE"/>
<handlers>
<handler name="CONSOLE"/>
<handler name="FILE"/>
</handlers>
</root-logger>
I am running an example using log4j 2.0-rc1 and log4j.properties file, but log4j lib always runs it with the default configuration (log level, appender, etc). I also tried changing the name to log4j2.properties and nothing happened.
Log4j 2 doesn't support the Log4j v1 ".properties" format anymore (yet, since v2.4, Log4j supports a Property format, but its syntax is totally different from v1 format). New formats are XML, JSON, and YAML, see the documentation (note: if you used one of these formats in a file called ".properties", it may be confusing).
To specify the location of your configuration file, do you use the system property log4j.configurationFile, the Log4j class ConfigurationFactory, or something else?
Did you read this manual page? It explains that:
Although the Log4j 2 configuration syntax is different than that of Log4j 1.x, most, if not all, of the same functionality is available.
So it seems that a legacy Log4j1.x log4j.propertiesfile is not supported as is, it must be migrated to v2.x format. The migration seems quite easy though, looking at the example in the link I gave above. Here is an extract:
Example of Log4j v1.x config file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
<appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
</layout>
</appender>
<category name="org.apache.log4j.xml">
<priority value="info" />
</category>
<Root>
<priority value ="debug" />
<appender-ref ref="STDOUT" />
</Root>
</log4j:configuration>
Same config file migrated to Log4j v2:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Appenders>
<Console name="STDOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
</Console>
</Appenders>
<Loggers>
<Logger name="org.apache.log4j.xml" level="info"/>
<Root level="debug">
<AppenderRef ref="STDOUT"/>
</Root>
</Loggers>
</Configuration>
As of version 2.4, Log4J2 does now, again, support .property files. See here in the documentation for property configuration.
Configuration with Properties
As of version 2.4, Log4j now supports configuration via properties files. Note that the property syntax is NOT the same as the syntax used in Log4j 1. Like the XML and JSON configurations, properties configurations define the configuration in terms of plugins and attributes to the plugins.
Log4j 2 uses a new configuration file format. You need to use XML (default), JSON (with additional libraries), or even YAML (again, libraries). Check out the documentation.
I've recently switched from log4j to logback and am wondering if there is an easy way to run logback in debug mode, similar to log4j's log4j.debug property. I need to see where it is picking up my logback.xml from.
The docs mention using a StatusPrinter to print out logback's internal status, but that would require code changes.
[EDIT]
This has been fixed in Logback 1.0.4. You can now use -Dlogback.debug=true to enable debugging of the logback setup.
-- Old Answer --
Unfortunately, there is no way to enable debugging via a System property. You have to use <configuration debug="true"> in the logback.xml. Please submit a feature request.
This is how I do it. I set a system property called 'log.level', then I reference it in logback.xml.
Edit: The downside is that you MUST have 'log.level' always set. The way I deal with this is to check in my main method and set it to INFO if not already set, be sure to do this before you first logging calls. Then I can override on the command line, and have a sensible default.
Here is how it looks in my logback.xml:
<configuration>
<logger name="com.mycompany.project" level="${log.level}" />
<logger name="httpclient" level="WARN" />
<logger name="org.apache" level="WARN" />
<logger name="org.hibernate" level="WARN" />
<logger name="org.hibernate.cfg.AnnotationBinder" level="WARN" />
<logger name="org.hibernate.cfg.annotations" level="WARN" />
<logger name="org.quartz" level="WARN" />
<logger name="org.springframework" level="WARN" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%-16thread] %-5level %-35.35logger{30} - %msg%n</pattern>
</encoder>
</appender>
<root level="${log.level:-INFO}">
<appender-ref ref="STDOUT" />
</root>
</configuration>
You can set the status listener class via system property:
java -Dlogback.statusListenerClass=ch.qos.logback.core.status.OnConsoleStatusListener ...
See: Logback manual
I could not make it work using the chosen answer. However, the following worked:
java -Dlogback.configurationFile=/path/to/config-debug.xml com.domain.Main
Just add a file (config-debug.xml in this example) somewhere on your server and leave it there when you need to debug. Like the following.
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<!-- encoders are assigned the type
ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
<encoder>
<pattern>%d{dd-MMM-yyyy HH:mm:ss.SSS} %-5level [%thread] %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="debug">
<appender-ref ref="STDOUT" />
</root>
</configuration>
Run your application using the afore mentioned -D parameter.
When things are back to normal, remove the -D parameter and restart your application.
Source: Chapter 3: Logback configuration
Well, It's pretty easy. Either you can use
log.level = debug
inside the application.properties of Spring boot.
or you can also set this in the configuration file of logback.xml
<root level="${log.level}">
<appender-ref ref="ANY_APPENDER" />
</root>
In eclipse you can have multiple run configurations. Open your main class. Go to Debug dropdown on eclipse toolbar and select Debug configurations. Click the New launch configuration icon at the top left. Give your launch configuration a better name. Click the Arguments tab under the name and enter -Dlog.level=debug or whatever you want. Click Close or Debug
You can do this again and specify -Dlog.level=warn for example.
Is there a way to configure log4j so that it outputs different levels of logging to different appenders?
I'm trying to set up multiple log files. The main log file would catch all INFO and above messages for all classes. (In development, it would catch all DEBUG and above messages, and TRACE for specific classes.)
Then, I would like to have a separate log file. That log file would catch all DEBUG messages for a specific subset of classes, and ignore all messages for any other class.
Is there a way to get what I'm after?
This should get you started:
log4j.rootLogger=QuietAppender, LoudAppender, TRACE
# setup A1
log4j.appender.QuietAppender=org.apache.log4j.RollingFileAppender
log4j.appender.QuietAppender.Threshold=INFO
log4j.appender.QuietAppender.File=quiet.log
...
# setup A2
log4j.appender.LoudAppender=org.apache.log4j.RollingFileAppender
log4j.appender.LoudAppender.Threshold=DEBUG
log4j.appender.LoudAppender.File=loud.log
...
log4j.logger.com.yourpackage.yourclazz=TRACE
Perhaps something like this?
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- general application log -->
<appender name="MainLogFile" class="org.apache.log4j.FileAppender">
<param name="File" value="server.log" />
<param name="Threshold" value="INFO" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p %t [%-40.40c] %x - %m%n"/>
</layout>
</appender>
<!-- additional fooSystem logging -->
<appender name="FooLogFile" class="org.apache.log4j.FileAppender">
<param name="File" value="foo.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p %t [%-40.40c] %x - %m%n"/>
</layout>
</appender>
<!-- foo logging -->
<logger name="com.example.foo">
<level value="DEBUG"/>
<appender-ref ref="FooLogFile"/>
</logger>
<!-- default logging -->
<root>
<level value="INFO"/>
<appender-ref ref="MainLogFile"/>
</root>
</log4j:configuration>
Thus, all info messages are written to server.log; by contrast, foo.log contains only com.example.foo messages, including debug-level messages.
I had this question, but with a twist - I was trying to log different content to different files. I had information for a LowLevel debug log, and a HighLevel user log. I wanted the LowLevel to go to only one file, and the HighLevel to go to both a file, and a syslogd.
My solution was to configure the 3 appenders, and then setup the logging like this:
log4j.threshold=ALL
log4j.rootLogger=,LowLogger
log4j.logger.HighLevel=ALL,Syslog,HighLogger
log4j.additivity.HighLevel=false
The part that was difficult for me to figure out was that the 'log4j.logger' could have multiple appenders listed. I was trying to do it one line at a time.
Hope this helps someone at some point!
For the main logfile/appender, set up a .Threshold = INFO to limit what is actually logged in the appender to INFO and above, regardless of whether or not the loggers have DEBUG, TRACE, etc, enabled.
As for catching DEBUG and nothing above that... you'd probably have to write a custom appender.
However I'd recommend not doing this, as it sounds like it would make troubleshooting and analysis pretty hard:
If your goal is to have a single file where you can look to troubleshoot something, then spanning your log data across different files will be annoying - unless you have a very regimented logging policy, you'll likely need content from both DEBUG and INFO to be able to trace execution of the problematic code effectively.
By still logging all of your debug messages, you are losing any performance gains you usually get in a production system by turning the logging (way) down.
Demo link: https://github.com/RazvanSebastian/spring_multiple_log_files_demo.git
My solution is based on XML configuration using spring-boot-starter-log4j. The example is a basic example using spring-boot-starter and the two Loggers writes into different log files.