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Logback is the most commonly used provider. It is generally configured by an XML document named logback.xml. See Configuration.
See HELM template https://git.onap.org/logging-analytics/tree/reference/provider/helm/logback
Log4j 2.X
Log4j 2.X is somewhat less common than Logback, but equivalent. It is generally configured by an XML document named log4j.xml. See Configuration.
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