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Apache Log4j 2 is not compatible with the previous versions. Please have the following in mind
when upgrading to Log4j 2 in your project:
- Java 6 is required
- The XML configuration has been simplified and is not compatible with Log4j 1.x
- Configuration via property files is not supported.
- Configuration via JSON or YAML is supported.
- Although Log4j 2 is not directly compatible with Log4j 1.x a compatibility bridge
has been provided to reduce the need to make coding changes.
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