Event Id 53530 is logged and connection to SQL database is lost in Skype for Business Server 2015 Persistent Chat Server

Applies To
Skype for Business Server 2015

Symptoms

When you use Microsoft Skype for Business Server 2015 Persistent Chat Server, you may receive the following event:

Note

  • Time: Date/Time
  • ID: 53530
  • Level: Error
  • Source: LS Persistent Chat Server
  • Machine: ServerName
  • Message: The Persistent Chat database connection was lost.
  • The Skype for Business Server 2015, Persistent Chat lost connection to the database using connection string:
  • Data Source=sql.contoso.com;Initial Catalog=mgc;Integrated Security=SSPI;
  • Cause: An unexpected error occurred that caused the loss of the Persistent Chat database connection.
  • Resolution:
  • Check the state of the database.

Cause

This issue occurs because the procProcessADUpdates stored procedure takes more than 30 seconds to run. Default Skype for Business Server 2015 Persistent Chat Server time-out is 30 seconds so that the stored procedure execution will be aborted.

Resolution

To fix this issue, install the December 2017 cumulative update 6.0.9319.510 for Skype for Business Server 2015, core components.