java - Suppress all Logback output to console?

Question

How can I configure Logback to suppress all of its output to the console (standard output)? In particular, I wish to suppress (or redirect) Logback's own log messages such as the following:

16:50:25,814 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
16:50:25,814 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/opt/dap/domains/ap0491/uat1/domain/instance-config/logback.xml]
16:50:25,816 |-WARN in ch.qos.logback.classic.LoggerContext[default] - Resource [logback.xml] occurs multiple times on the classpath.
16:50:25,816 |-WARN in ch.qos.logback.classic.LoggerContext[default] - Resource [logback.xml] occurs at [file:/opt/dap/domains/ap0491/uat1/domain/instance-config/logback.xml]
16:50:25,816 |-WARN in ch.qos.logback.classic.LoggerContext[default] - Resource [logback.xml] occurs at [file:/opt/dap/domains/ap0491/uat1/domain/instance-config/logback.xml]
16:50:25,923 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
16:50:25,924 |-INFO in ch.qos.logback.classic.turbo.ReconfigureOnChangeFilter@1a15291 - Will scan for changes in file [/opt/dap/domains/ap0491/uat1/domain/instance-config/logback.xml] every 60 seconds. 

I need to disable all logging to standard output because our production environment disallows applications from printing any messages to standard output.

Note I'm using Logback 0.9.21, SLF4J 1.6.0, and our application runs in WebLogic 10.3.2.

Answer 1

Those messages only show if at least one of the following is true:

• you have debugging enabled in the logback.xml file
• you have an error in your configuration. That is the case here - logback complains about multiple configuration files found.
• there is a classpath problem if your environment provides conflicting files. (this one occurred to me yesterday and was the real cause of this question).
• (there is a bug in logback - has happened)

Correct the issue and those messages should go away.