This is the error inside this log file:
it could be that appserver port is in use. Could you please also share appserverlauncher.log from appserver_install/NSH/br folder it should contain more information.
Thanks for you response.Below are logs in appserverlauncher.
[25 Aug 2015 16:15:03,903] [main] [ERROR] [::]  Application server **** failed to start. Please check the deployment log for 'default' deployment and the deployment console log file 'console.log' for more details.
com.bladelogic.om.infra.mfw.util.BlException: Application server **** failed to start. Please check the deployment log for 'default' deployment and the deployment console log file 'console.log' for more details.
What change did you make before restarting appserver? Did you maybe run upgrade? If not, did you changed anything in blasadmin or infrastructure managment?
Could you please attach full console and appserver.log so we can see complete stack trace?
 Port already in use: 9836; nested exception is:
java.net.BindException: Address already in use: JVM_Bind
java.rmi.server.ExportException: Port already in use: 9836; nested exception is:
that seems to be the problem. what is bound to that port ?
Thanks for your reply.
I got the solution for that.Actually i have run secadmin command and by secadmin utility you can delete and modify an existing entry in the secure file.