server - Error when starting JBoss -

get below error when starting jboss. tried reuploading jars, wars , modules. wasn't of help.

starting jboss-as: exception in thread "main" java.lang.exceptionininitializererror    @ java.lang.class.initializeclass(libgcj.so.10)    @ __redirected.__jaxpredirected.initall(__jaxpredirected.java:87)    @ org.jboss.modules.module$1.run(module.java:85)    @ org.jboss.modules.module$1.run(module.java:72)    @ java.security.accesscontroller.doprivileged(libgcj.so.10)    @ org.jboss.modules.module.<clinit>(module.java:72)    @ java.lang.class.initializeclass(libgcj.so.10)    @ org.jboss.modules.main.main(main.java:255) caused by: java.lang.illegalargumentexception: problem configuring datatypefactory    @ __redirected.__datatypefactory.<clinit>(__datatypefactory.java:70)    @ java.lang.class.initializeclass(libgcj.so.10)    ...7 more caused by: javax.xml.datatype.datatypeconfigurationexception: java.lang.classnotfoundexception: gnu.xml.datatype.jaxpdatatypefactory    @ javax.xml.datatype.datatypefactory.newinstance(libgcj.so.10)    @ __redirected.__datatypefactory.<clinit>(__datatypefactory.java:62)    ...8 more caused by: java.lang.classnotfoundexception: gnu.xml.datatype.jaxpdatatypefactory    @ java.lang.class.forname(libgcj.so.10)    @ javax.xml.datatype.datatypefactory.newinstance(libgcj.so.10)    ...9 more 

i solved above issue updating java. using java 1.5 updated java 1.7.xx. not getting error more, application works fine.

i curious know causes issue, if answer helpful