Guys,
Here is notification of a possible incompatibility between log4j and nlog4j.
I've been encountering it within IDEA, as I try to integrate one
library, which contains a dependency to ApacheDS, within another
application, which contains a dependency to vanilla log4j.
In IDEA the problem occurs as a NoSuchMethodError for simple logging
statements:
java.lang.NoSuchMethodError:
org.apache.log4j.Logger.debug(Ljava/lang/String;)V
The implementation of org.apache.log4j.Category (and
org.apache.log4j.Logger) differs between nlog4j and log4j. When running
within IDEA the problem is noticed late in the piece.
I've written a quick test application, which has two classes. One with a
dependency on org.apache.log4j.Logger with its own log4j library (ver
1.2.8) and another class with an nlog4j 1.2.14 dependency. It results in a
Exception in thread "main" java.lang.IncompatibleClassChangeError
Note - this is at runtime, not during compilation.
I'm going to follow up this problem with the nlog4j team later this
evening. I'm just letting people know of the possible issue.
SLF4J should be able to run happily within applications already using
Log4j. If it can't it means that ApacheDS wont be compatible with
pre-existing applications relying upon log4j, unless we remove SLF4J or
unless it is repaired.
Cheers,
Nick
--
ATLASSIAN - http://www.atlassian.com/
Confluence - the enterprise wiki - tried it yet?
http://www.atlassian.com/confluence/
--
