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Home > Success Center > Network Performance Monitor (NPM) > Unexpected SQL Error. Connection Timeout Expired

Unexpected SQL Error. Connection Timeout Expired

Created by Wilard Bao, last modified by Leif Amland on Sep 01, 2016

Views: 1,052 Votes: 0 Revisions: 5

Overview

The following error occurs when NPM is trying to connect to SQL.

Environment

  • NPM v10.x
  • NPM v11.x
  • NPM v12.x

Cause 

This issue is caused by a connection problem from NPM to SQL.

Resolution

  1. Open Database Manager and click Add default server.
    If the same error message appears, the connection to SQL needs to be fixed.
  2. Use telnet to verify if port 1433 is open.
  3. If it still does not connect, verify if there is something that is blocking the server from establishing a connection to the SQL server.

 

Resolution #2: Run the configuration wizard again and select all 3 choices, database/website/services and this should resolve the error.

 

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