HADR_NOTIFICATION_WORKER_EXCLUSIVE_ACCESS

Description

For databases utilizing Availability Groups. Used internally while Windows Failover Clustering is waiting for exclusive access to the Availability Group runtime state. This wait is uncommon, investigation is required if the values are excessive.

Resolved by

DBAs

Suggested solutions

  1. Examine Windows Failover Clustering logs for any issues
  2. Check the SQL Server error log for more information
  3. Examine wait statistics on the instance for other Availability Group issues. Investigate accordingly

Additional research

AlwaysOn Availability Groups Troubleshooting and Monitoring Guide

See more

Consider using ApexSQL Monitor, a Windows and SQL Server monitoring tool able to track SQL Server wait types, including the individual query wait statistics

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