I don't think that this is JBoss related.
Maybe the JVM crash, could you look for a hs_err_pid*.log file? It will be in the folder where the process is started.
Which Java version do you use?
I would recommend to use an actual JVM and upgrade to a newer JBoss/WildFly version as 7.1.1 is an older version
This is solved , by changing the java memory settings ie JAVA_OPTS="-Xms2048m -Xmx2048m -XX:MaxPermSize=512m
Thanks for all your help