http://bugzilla.qos.ch/show_bug.cgi?id=73 Summary: LOGBack 0.9.5 doesn't work with SLF4J 1.4.0 Product: logback-core Version: unspecified Platform: All OS/Version: All Status: NEW Severity: blocker Priority: P1 Component: Other AssignedTo: logback-dev@qos.ch ReportedBy: agerwe@acxiom.com With the addition of the trace level in SLF4J 1.4.0, the constants for the log level constants in org.slf4j.spi.LocationAwareLogger were changed from 0, 1, 2, 3 to 10, 20, 30, 40. Unfortuantely, constant values like integers are actually compiled into classes and not read at runtime from the defining class: you need to upgrade all your binaries if you change the values of constants. The case statement at line 745 in ch.qos.logback.classic.Logger no longer works unless manually recompiled against the new Log4j. If you try to use LOGBack-classic 0.9.5 from iBiblio with SLF4J 1.4.0 (which seems to be missing :-(), you will not be able to log anything: every non-TRACE log attempt will fail with "n is not a valid integet" [sic] where n is 10, 20, 30 or 40. It would have been *much* wiser to simply set TRACE to -1 or even 4 rather than changing the existing constants and creating a big headache and forced binary upgrades that are very difficult to debug. -- Configure bugmail: http://bugzilla.qos.ch/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee.