This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
That is not what uttam asked. Did you make any changes to JBoss AS? If you made no changes to JBoss AS, then I suspect that your download of JBoss AS got corrupted somehow. Remove what you have and download it again.