Hi @Manoj Dhake,
Glad to seeing you using the Waterline sandbox. You have the command right: waterline profileOnly <HDFS dir>.
To see what happened when you ran the command, you can get a very high-level look from the Dashboard page in the Waterline UI. If that shows that the job ran successfully, you might try refreshing the browser page (a hard refresh such as a command-r or control-r might be needed). If the job doesn't appear in the dashboard or it shows that it failed, you can look for more details in the jobs log: /var/log/waterline/wdi-inventory.log.
Because the sandboxes are pretty limited, it may be that the job is running out of resources. The wdi-inventory.log and corresponding MapReduce logs should make that clear if its the case.
Waterline Data Technical Support