Unexpected log messages on stdout

jboss-eap-5.3/jboss-as/bin/run.sh --host=localhost -c default

[rsvoboda@steve 630ER2]$ java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)

...
13:33:56,713 INFO  [Http11Protocol] Starting Coyote HTTP/1.1 on http-localhost%2F127.0.0.1-8080
13:33:56,731 INFO  [AjpProtocol] Starting Coyote AJP/1.3 on ajp-localhost%2F127.0.0.1-8009
13:33:56,833 INFO  [ServerImpl] JBoss (Microcontainer) [5.3.0 (build: SVNTag=JBPAPP_5_3_0 date=201403010857)] Started in 17s:386ms
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor37]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor25]
[Unloading class sun.reflect.GeneratedConstructorAccessor73]
[Unloading class sun.reflect.GeneratedConstructorAccessor6]
[Unloading class sun.reflect.GeneratedConstructorAccessor82]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor12]
[Unloading class sun.reflect.GeneratedConstructorAccessor5]
[Unloading class sun.reflect.GeneratedConstructorAccessor9]
[Unloading class sun.reflect.GeneratedConstructorAccessor10]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor46]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor6]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor34]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor3]
[Unloading class sun.reflect.GeneratedMethodAccessor225]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor47]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor11]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor50]
[Unloading class sun.reflect.GeneratedConstructorAccessor16]
[Unloading class sun.reflect.GeneratedConstructorAccessor13]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor52]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor2]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor32]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor38]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor13]
[Unloading class sun.reflect.GeneratedConstructorAccessor85]
[Unloading class sun.reflect.GeneratedConstructorAccessor47]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor1]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor44]
[Unloading class sun.reflect.GeneratedConstructorAccessor79]
[Unloading class sun.reflect.GeneratedConstructorAccessor50]
[Unloading class sun.reflect.GeneratedConstructorAccessor57]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor5]
[Unloading class sun.reflect.GeneratedConstructorAccessor26]
[Unloading class sun.reflect.GeneratedConstructorAccessor51]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor48]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor15]
[Unloading class sun.reflect.GeneratedConstructorAccessor14]
[Unloading class sun.reflect.GeneratedMethodAccessor247]
[Unloading class sun.reflect.GeneratedConstructorAccessor28]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor42]
[Unloading class sun.reflect.GeneratedMethodAccessor224]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor10]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor17]
[Unloading class sun.reflect.GeneratedConstructorAccessor15]
[Unloading class sun.reflect.GeneratedMethodAccessor180]
[Unloading class sun.reflect.GeneratedMethodAccessor252]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor35]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor4]
[Unloading class sun.reflect.GeneratedMethodAccessor183]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor7]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor23]
...