[slf4j-dev] [Bug 122] Exception regarding SINGLETON object in slf4j 1.5.2 and 1.5.6

bugzilla-daemon at pixie.qos.ch bugzilla-daemon at pixie.qos.ch
Mon Dec 15 11:29:26 CET 2008


http://bugzilla.slf4j.org/show_bug.cgi?id=122





--- Comment #3 from Ceki Gulcu <listid at qos.ch>  2008-12-15 11:29:25 ---

As mentioned in [1], mixing mixing different versions of slf4j artifacts can
cause problems. For example, if you are using slf4j-api-1.5.6.jar, then you
should also use slf4j-simple-1.5.6.jar, using slf4j-simple-1.4.2.jar will not
work. 

>From the stack trace you provide, I suspect that you are using an older version
of slf4j-api, version 1.4.x. Is slf4j-api-1.4.x.jar on your class path?

You should ascertain that slf4j-api.jar, and the slf4j binding you are using
have the same versions. 

[1] http://www.slf4j.org/codes.html#version_mismatch


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