JBoss AS won't start on Java 1.5 (in contrast to 1.4)

[robbbert]

Ubuntu Linux 6.06
Sun JDK 1.5_06, resp. 1.4_12
JBoss AS 4.0.4 GA

When I try to start a freshly unzipped distribution of JBoss AS (by using run.sh), the following exception gets thrown:

=========================================================================

 JBoss Bootstrap Environment

 JBOSS_HOME: /media/hde1/home/robert/opt/jboss-4.0.4.GA

 JAVA: /usr/lib/j2sdk1.5-sun/bin/java

 JAVA_OPTS: -server -Xms128m -Xmx512m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Dprogram.name=run.sh

 CLASSPATH: /media/hde1/home/robert/opt/jboss-4.0.4.GA/bin/run.jar:/usr/lib/j2sdk1.5-sun/lib:/usr/lib/j2sdk1.5-sun/external-jars:/usr/lib/j2sdk1.5-sun/jre/lib/ext

=========================================================================

Failed to boot JBoss:
java.lang.NullPointerException
 at java.util.Properties$LineReader.readLine(Properties.java:365)
 at java.util.Properties.load(Properties.java:293)
 at org.jboss.Version.loadProperties(Version.java:262)
 at org.jboss.Version.<init>(Version.java:59)
 at org.jboss.Version.getInstance(Version.java:71)
 at org.jboss.system.server.ServerImpl.<init>(ServerImpl.java:72)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
 at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
 at java.lang.Class.newInstance0(Class.java:350)
 at java.lang.Class.newInstance(Class.java:303)
 at org.jboss.system.server.ServerLoader.createServer(ServerLoader.java:274)
 at org.jboss.system.server.ServerLoader.load(ServerLoader.java:253)
 at org.jboss.Main.boot(Main.java:188)
 at org.jboss.Main$1.run(Main.java:464)
 at java.lang.Thread.run(Thread.java:595)

In contrast, when I edit the JAVA_HOME property in $JBOSS_HOME/bin/run.conf to point to the Sun JDK 1.4, JBoss AS starts without this error.

org.jboss.Version.loadProperties() (in $JBOSS_HOME/bin/run.jar):

InputStream in =
 Version.class.getResourceAsStream("/org/jboss/version.properties");

Debugging the server in Eclipse shows that the error occurs because the stream object is null when loaded via Java 1.5.

Please note that the classpath is the same in both cases.

Any ideas?

Thanks
Robert