Hi Rachit,
I've tested it on my hana instance (rev. 70) and found the reason why the job log is not displayed.
First, I also created a xsjob and the xsjob will run the insert function in a xsjs every second. When I clicked "Active" and "Save", the following happens:
1. The result table is inserted a record per second, which means the job is running.
2. There is log in _SYS_XS.JOB_LOG, also a record per second. All of them show "SUCCESS" status. _SYS_XS.JOB_LOG is the system table to store the job log.
3. There is no job log displayed when I clicked "Refresh", the same with your attachment.
When you press F12 in Chrome and change to "Network" tab, you will find the reason. The call function failed. When you see the source of sap/hana/xs/admin in the repo, you can find that there is no db/joblog.xsodata which shoud expose the content of _SYS_XS.JOB_LOG.
So, that's the reason why the job log is not displayed on the web, but it is actually running successfully. I think it is a bug in rev. 70. Don't know whether it is fixed in later version.
Best regards,
Wenjun