Can Maven be made less verbose?

Question

Maven spews out far too many lines of output to my taste (I like the Unix way: no news is good news).

I want to get rid of all [INFO] lines, but I couldn't find any mention of an argument or config settings that controls the verbosity of Maven.

Is there no LOG4J-like way to set the log level?

Solution 1

You can try the -q switch.

-q,--quiet Quiet output - only show errors

Solution 2

-q as said above is what you need. An alternative could be:

-B,--batch-mode Run in non-interactive (batch) mode Batch mode is essential if you need to run Maven in a non-interactive, continuous integration environment. When running in non-interactive mode, Maven will never stop to accept input from the user. Instead, it will use sensible default values when it requires input.

And will also reduce the output messages more or less to the essentials.

Solution 3

My problem is that -q is too quiet. I'm running maven under CI

With Maven 3.6.1 (April 2019), you now have an option to suppress the transfer progress when downloading/uploading in interactive mode.

mvn --no-transfer-progress ....

or in short:

mvn -ntp ... ....

That is what Ray proposed in the comments with MNG-6605 and PR 239.

Solution 4

Official link : https://maven.apache.org/maven-logging.html

You can add in the JVM parameters :

-Dorg.slf4j.simpleLogger.defaultLogLevel=WARN

Beware of UPPERCASE.

Solution 5

Use the -q or --quiet command-line options

View more solutions

Comments

[codeturner]

@sheki: To clarify, this option does not disable logger debug messages - you need turn that off via your logger settings. For example, if you're using logback, including a src/test/resources/logback-test.xml file in your project will let you customize your logging level to 'off' during the test phase. This will clean everything up.

[Guss]

My problem is that -q is too quiet. I'm running maven under CI, and I want to see the steps it takes (to track progress), but the download indicators are making mess of the non-ANSI display. Is there a way to only turn off the download progress indicators?

[ankon]

@Guss: If you only want the Downloading/Downloaded messages to go away, use -B to enable batch mode (you should have that in your CI system anyways!), and then set MAVEN_OPTS="-Dorg.slf4j.simpleLogger.log.org.apache.maven.cl‌​i.transfer.Slf4jMave‌​nTransferListener=wa‌​rn" to kill the progress information for the downloads.

[Auke]

In maven 3.5.x I actually need to enable --batch-mode (-B) for the -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.S‌​lf4jMavenTransferLis‌​tener=warn trick to work.

[Stanislav]

it is used for non-interactive mode, which helps when automating runs

[Ray]

if you are inclined I've submitted a proposed solution compatible with interactive mode issues.apache.org/jira/browse/MNG-6605 , github.com/apache/maven/pull/239

[user1511417]

-q kind of works here (mvn 3.6.0, java 11.0.6) . Unfortunately I still get warnings like this: WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.google.inject.internal.cglib.core. etc.

[Hilikus]

This solution suppresses upload messages as well as downloads, which is usually not desired in a deploy task