8.8. Logging Configuration

Each GeoMesa binary distribution comes bundled with an SLF4J logging implementation in the lib directory. If you already have an SLF4J implementation on your Java classpath you may see errors at runtime and will have to exclude one of the JARs. This can be accomplished by simply deleting the bundled lib/slf4j-reload4j-1.7.36.jar.

Note that if no SLF4J implementation is installed logging will not work, and you will see this error:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See https://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

In this case you may download SLF4J here. Extract slf4j-reload4j-1.7.36.jar and place it in the lib directory of the binary distribution.