Foxhound 5.0 FAQ
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Question: Why does "Duplicate Foxhound sampling sessions" appear after a High Availability failover?

Answer: This can occur normally when the target database is running on the secondary (mirror) server and failover occurs; for example:

  • Foxhound is successfully gathering samples from both the primary and secondary (mirror) servers in a High Availability (HA) setup.

  • The primary server fails, and the secondary (mirror) server automatically becomes the primary server as part of the failover process.

  • The Foxhound sampling session that was connected to the old primary server loses its connection (because the primary server failed).

  • That Foxhound sampling session automatically connects to the server which used to be the secondary (mirror) server and now is the primary server.

  • The other Foxhound sampling session remains connected to the server which used to be the secondary (mirror) server and now is the primary server.

  • ...which means both Foxhound sessions are connected to the same database, hence the "Duplicate Foxhound sampling sessions" message.
Foxhound Sampling Session #1...

Connection string name: HA_Demo_16_Primary
Connection string:      SERVER=primary_demo; UID=dba; PWD=sql; HOST=Computer1:55501,Computer2:55502; DRIVER=SQL Anywhere Native;

Sampling OK ...
 Machine: XPS ...
  Server: partner2_demo ...
Database: demo ...
Updatable primary database. Arbiter is connected.  Partner is disconnected, synchronizing.  
Duplicate Foxhound sampling sessions. There is more than one Foxhound connection to this target database. 
Foxhound Sampling Session #2...

Connection string name: HA_Demo_16_Secondary
Connection string:      SERVER=secondary_demo; UID=dba; PWD=sql; HOST=Computer1:55501,Computer2:55502; DRIVER=SQL Anywhere Native;
	
Sampling OK ...
 Machine: XPS ...
  Server: partner2_demo ...
Database: demo ...
Updatable primary database. Arbiter is connected.  Partner is disconnected, synchronizing.  
Duplicate Foxhound sampling sessions. There is more than one Foxhound connection to this target database. 


This page was last updated on June 19, 2016.      Foxhound 5.0 FAQ Home      Foxhound Home      RisingRoad      Breck.Carter@gmail.com