Why Am I not able to see stdout, stderr for spark driver

I was trying to run my first sample spark application today in bigdata-labs.
I was checking for driver logs, which generally can be seen in stdout or stderr at driver end. But was not able to find them in the below link
http://gw01.itversity.com:18080/history/application_1489159605590_0250/executors/

Also, stdout and stderr present at the executors are not accessible. The link’s are not accessible.
Please shed some insight, if I am missing anything.

Thanks,
Ashok

@itversity Request you to help on this.