When use the hot deploy option a have the folowin exception while deploying log4j:

14:30:58,762 INFO [STDOUT] log4j: setFile called: velocity.log, true
14:30:58,762 INFO [STDOUT] log4j: setFile ended
14:30:58,763 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,788 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,789 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,789 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,789 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,789 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,789 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,789 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,789 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,819 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,820 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,825 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].
14:30:58,825 INFO [STDOUT] log4j:ERROR Attempted to append to closed appender named [null].

When I reastart jboss, the deployment process run with no problems.