https://support.symantec.com/en_US/article.TECH200710.html
You can put in place the suggested values outlined in TECH200710. It will force the hang jobs to timeout.
I have the same issue and have an open case with support. i made several changes but nothing helped. implemented queries, added another media server (and balance the work), set limits (vcenter and datastore), change buffer size. implemented some regi...