I'm trying to add a new block to a Cocoon web app and every time I try
to do a 'mvn jetty:run' command I get a 'java.lang.AbstractMethodError'
and the web app just seems to stop serving web pages (error list shown
at end of this message).
The block in question makes calls to the Sesame [1] RDF triplestore.
The important thing is that, like a lot of modern Java apps, Sesame
makes use of SLF4J [2] to do its logging. I'm not familiar with the
various logging frameworks but I think I've accidently walked into a
minefield here! Cocoon seems to use Log4j, Jetty might be using
something else and my block might need slf4j. Add to this that I've
seen a report about slf4j not playing well with the Reloading Class
Loader (RCL) and I think I'm well and truly stuffed!
Please, if anyone knows how to get a library that uses slf4j to play
nicely in a Cocoon environment I'd be very grateful ;-)
Regards,
David Legg
Errors...
...
[INFO] [jetty:run]
[INFO] Configuring Jetty for project: meerkat-browser
...
2008-07-15 16:57:35.032::INFO: Logging to STDERR via
org.mortbay.log.StdErrLog
[INFO] Starting jetty 6.1.7 ...
2008-07-15 16:57:35.112::INFO: jetty-6.1.7
...
2008-07-15 16:57:36.964::WARN: failed
[EMAIL PROTECTED]/,D:\projects\meerkat\meerkat-browser\target\rcl\webapp}
java.lang.AbstractMethodError:
org.slf4j.impl.SimpleLogger.trace(Ljava/lang/String;)V
at
org.apache.commons.logging.impl.SLF4JLog.trace(SLF4JLog.java:82)
at
org.springframework.core.CollectionFactory.createConcurrentMapIfPossible(CollectionFactory.java:195)
...
[1] http://www.openrdf.org/
[2] http://www.slf4j.org/
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