The search request was unable to connect to the Search Service

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ERROR MESSAGE:

1. Error on Server status for query server in Search Administration.

2. While search getting error "The search request was unable to connect to the Search Service."

RESOLUTION:

  1. Accessed the URL from the Index server https://queryservername:56738/SharedServices1(whatever_ssp_name_is)/Search/Searchadmin.asmx and got 404 page cannot be found error.
  2. The Port Number 56737, 56738 was not opened between the Index & Query servers.
  3. Got the port opened between the INdex & Query servers and the error message on Search Administration  got disappeared.
  4. But still we were not able to propagate the content.
  5. Found that the TCP/UDP 445 port number was not opened between the servers.
  6. Got the ports opened between servers and the Indexed items got propagated successfully.
  7. We were able to search on the website without any error.