How to change maven logging level to display only warning and errors

Question

I want to prevent maven from displaying INFO messages  I want to see only WARNINGS and ERRORS  if any     How can I achieve this  preferably by changing the command line that calls maven

User · Answer

Linux   mvn validate clean install   egrep -v      INFO       or  mvn validate clean install   egrep -v      INFO      DEBUG       Windows   mvn validate clean install   findstr  V  R     INFO      DEBUG

User · Answer

You can achieve this with MAVEN OPTS  for example MAVEN OPTS -Dorg slf4j simpleLogger defaultLogLevel warn mvn clean  Rather than putting the system property directly on the command line    At least for maven 3 3 1    Consider using    mavenrc for setting MAVEN OPTS if you would like logging changed for your login across all maven invocations

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I have noticed when using the 2 20 1 version of the maven sunfire plugin  all warnings are written down to a dumpstream file  e g   myproject target surefire-reports 2017-11-11T23-02-19 850 dumpstream

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Answering your question I made a small investigation because I am also interested in the solution  Maven command line verbosity options According to http   books sonatype com mvnref-book reference running-sect-options html running-sect-verbose-option  -e for error -X for debug -q for only error  Maven logging config file Currently maven 3 1 x uses SLF4J to log to the System out   You can modify the logging settings at the file    MAVEN HOME  conf logging simplelogger properties  According to the page   http   maven apache org maven-logging html Command line setup I think you should be able to setup the default Log level of the simple logger via a command line parameter  like this    mvn clean package -Dorg slf4j simpleLogger defaultLogLevel debug  But I could not get it to work  I guess the only problem with this is  maven picks up the default level from the config file on the classpath  I also tried a couple of other settings via System properties  but all of them were unsuccessful  Appendix You can find the source of slf4j on github here   slf4j github The source of the simplelogger here   slf4j jcl-over-slf4j src main java org apache commons logging impl SimpleLog java The plexus loader loads the simplelogger properties

User · Answer

you can achieve this by using below in the commandline itself   x000D   x000D   -e for error x000D  -X for debug x000D  -q for only error x000D   x000D   x000D    e g     x000D   x000D  mvn test -X -DsomeProperties  SomeValue   For Debug level Logs  x000D  mvn test -e -DsomeProperties  SomeValue   For Error level Logs  x000D  mvn test -q -DsomeProperties  SomeValue   For Only Error Logs  x000D   x000D   x000D

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If you are using Logback  just put this logback-test xml file into src test resources directory    lt configuration gt   lt appender name  STDOUT  class  ch qos logback core ConsoleAppender  gt       lt encoder gt           lt pattern gt  d HH mm ss SSS    thread   -5level  logger 36  -  msg n lt  pattern gt       lt  encoder gt   lt  appender gt   lt root level  INFO  gt       lt appender-ref ref  STDOUT    gt   lt  root gt   lt  configuration gt

User · Answer

Go to simplelogger properties in   MAVEN HOME  conf logging  and set the following properties   org slf4j simpleLogger defaultLogLevel warn org slf4j simpleLogger log Sisu warn org slf4j simpleLogger warnLevelString warn   And beware  warn  not warning

User · Answer

Unfortunately  even with maven 3 the only way to do that is to patch source code   Here is short instruction how to do that   Clone or fork Maven 3 repo   git clone https   github com apache maven-3 git   Edit org apache maven cli MavenCli logging  and change  cliRequest request setLoggingLevel  MavenExecutionRequest LOGGING LEVEL INFO      to  cliRequest request setLoggingLevel  MavenExecutionRequest LOGGING LEVEL WARN      In current snapshot version it s at line 270  Then just run  mvn install   your new maven distro will be located in  apache-maven target   folder  See this diff for the reference  https   github com ushkinaz maven-3 commit cc079aa75ca8c82658c7ff53f18c6caaa32d2131

User · Answer

Changing the info to error in simplelogging properties file will help in achieving your requirement   Just change the value of the below line  org slf4j simpleLogger defaultLogLevel info    to  org slf4j simpleLogger defaultLogLevel error

User · Answer

The simplest way is to upgrade to Maven 3 3 1 or higher to take advantage of the   maven projectBasedir   mvn jvm config support   Then you can use any options from Maven s SL4FJ s SimpleLogger support to configure all loggers or particular loggers  For example  here is a how to make all warning at warn level  except for a the PMD which is configured to log at error   cat  mvn jvm config -Dorg slf4j simpleLogger defaultLogLevel warn -Dorg slf4j simpleLogger log net sourceforge pmd error   See here for more details on logging with Maven

[maven-2] How to change maven logging level to display only warning and errors?

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