I am running scheduled search for last 24 hours.It never completes and show status as "completed" and Job inspector says
This search has encountered a fatal error and has been marked as zombied.
What is the reason for this.
See this previous Answers posting (found by searching for zombie on this site).
View solution in original post
I had this exact symptom and managed to fix it by disabling Transparent Huge Pages (THP) on a server.
Basically when server is pressed on memory or search is pushing some limits - THP comes into play in a weird ways causing silent failures.
See more here:
Thankyou. Appreciate it.