This is a known issue with 8.x - when a pod is restarted / redeployed, the custom jar you copied manually is not carried over.
There is an open support request about this issue. As far as I know, the fix is not ready yet.
7.x and 8.x deployment models are a bit different, so such workarounds with manually copying files may not be applicable in 8.x.
I C. Thank you llian.
is there a URL to link to this known issue on official website?
Not sure if there is an externally visible URL accessible from the official website. I see you are VMware employee, so I can send you PM with the issue number in VMware's internal bug tracking system.