I thought that maybe my username ("libresource") was too long because even ps only showed my uid instead of my name. I changed it to libresrc (exactly 8 chars), but starting didn't succeed either. But a new log message appeared:
JONAS_BASE set to /home/libresrc/libresrc/JOnAS/
2006-02-09 13:52:10,320 : Server.<init> : JVM used is 1.5.0_06 version of Sun Microsystems Inc. vendor on Linux 2.6.14-gentoo-r5/i386 OS.
2006-02-09 13:52:10,362 : PolicyProvider.init : Using JOnAS PolicyConfigurationFactory provider and JOnAS Policy provider
2006-02-09 13:52:17,340 : ServiceManager.startRegistry : registry service started
connection null Chunk[data: "error">invalid link : B@92bbba offset: 2 top: 231(Illegal character in scheme name at index 1: B@92bbba offset: 2 top: 231) Chunk[data: "error">invalid link : B@92bbba offset: 2 top: 231(Illegal character in scheme name at index 1: B@92bbba offset: 2 top: 231)
JOnAS server jonas unreachable
Maybe this helps?