Seems like good idea: - remove long dead dependency - a bit cleaner code - hadoop also moved to slf4j
Quickly looking at codebase to get idea of amount of work required, here are some numbers: - LOG.debug : ~1800 - LOG.trace : ~500 - LOG.info: ~3000 Looking at this patch ( https://issues.apache.org/jira/secure/attachment/12901002/HBASE-19449.1.patch), seemed like tedious and repetitive task, was wondering if someone has automated it already. Looks like this can help reduce a huge part of grunt work: https://www.slf4j.org/migrator.html. But before progressing, as a basic validation, can we see: - an example of old vs new log lines (that there is no diff, or we are comfortable with what's there) - an example of changes in properties file Maybe starting with hbase-examples module for quick POC. -- Appy
