The index service seems to be unavaliable. Please check the index service.

[vijaybadugu]

When i try to add an item or delete an item , i am getting the error "

The index service seems to be unavaliable. Please check the index service." In ArcGIS Portal 10.7 ". 

Please suggest the solution 

[JonathanQuinn]

At 10.7.1, we updated how we reindex which should resolve index related problems, (corruption, mostly). If there's a couple item difference between the store count and index count, reindexing won't fix that. The best course of action is to work with Support to identify which items it can't add to the index.

[PeggyWang]

I got the same error message when I tried to add an item in Portal for ArcGIS 10.7, in Linux OS.

"The index service seems to be unavaliable. Please check the index service."

The solutions above seem to fix the problems on Windows. Is there any solution for Linux OS?