Problem
With some MettleCI command line options you may receive some messages that look like errors preceded by SLF4J:
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c:\Jenkins\Builds\workspace\wwi_jenkins_ds117>C:\dm\mci\cli\mettleci.cmd remote execute -host demo4-engn.datamigrators.io -username **** -password **** -script "config\cleanup.sh" MettleCI Command Line. Build 96 (C)2019 Data Migrators Pty Ltd SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. Connecting to demo4-engn.datamigrators.io on port 22 exit code = 0
Solution
Despite their somewhat alarming wording these messages are innocuous logging messages from one of the open source Java modules used within MettleCI and can be safely ignored. A future release of MettleCI will suppress these messages.