Occasional NPE in org.apache.commons.modeler.Registry during startup

Sometimes (but less than half the times), I get the following in the log when JBoss is started:

2006-11-09 17:38:14,453 INFO [org.apache.coyote.http11.Http11Protocol] Starting Coyote HTTP/1.1 on http-0.0.0.0-8080
2006-11-09 17:38:14,468 INFO [org.apache.coyote.http11.Http11Protocol] Starting Coyote HTTP/1.1 on http-0.0.0.0-8443
2006-11-09 17:38:14,468 INFO [org.apache.coyote.http11.Http11Protocol] Starting Coyote HTTP/1.1 on http-0.0.0.0-9443
2006-11-09 17:38:14,484 INFO [org.jboss.system.server.Server] JBoss (MX MicroKernel) [4.0.3SP1 (build: CVSTag=JBoss_4_0_3_SP1 date=200510231054)] Started in 19s:531ms
2006-11-09 17:38:14,500 WARN [org.apache.commons.modeler.Registry] No metadata found for org.apache.coyote.RequestInfo
2006-11-09 17:38:14,500 ERROR [org.apache.commons.modeler.Registry] Error registering jboss.web:type=RequestProcessor,worker=http-0.0.0.0-8443,name=HttpRequest2
java.lang.NullPointerException
at org.apache.commons.modeler.Registry.registerComponent(Registry.java:862)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.init(Http11Protocol.java:709)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.getInitData(LeaderFollowerWorkerThread.java:48)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:673)
at java.lang.Thread.run(Thread.java:595)
2006-11-09 17:38:14,500 WARN [org.apache.coyote.http11.Http11Protocol] Error registering request