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Editorial Team
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Asked: 2026-05-31T20:31:03+00:00

We are using log4j+commons-logging in our current projects. Now we are mirgrating from log4j

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We are using log4j+commons-logging in our current projects. Now we are mirgrating from log4j to Logback, so can we just use replace log4j.properties with logback.xml or we have to convert log4j to SLF4J?

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  1. Editorial Team

    You can use SLF4J and its log4j-over-slf4j module.

    From the documentation:

    log4j-over-slf4j

    SLF4J ship with a module called log4j-over-slf4j. It allows log4j users to migrate existing applications to SLF4J without changing a single line of code but simply by replacing the log4j.jar file with log4j-over-slf4j.jar, as described below.

    You also need Logback behind SLF4J and Logback configuration (logback.xml/logback.groovy etc.)

    A similar module exists for commons-logging also. (See Gradual migration to SLF4J from Jakarta Commons Logging (JCL).)

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