Failover Takes Long Due To Connection Blocking

Mar 27, 2007

We are using SQL Server 2005 mirroring with the witness server.

In most cases whenever a failover was triggered we saw it happen in a matter

of a few seconds. However, the last time it took about 15 minutes - we suspect

due to Connection being blocked.

Would appreciate any information on what could cause this?



We have 2 databases that run on the server.



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We are having problems getting the ADO.NET client to failover in a timely manner in a web application. Here's what happens:

1) Database fails over in 3 to 5 seconds
2) Clients attempt to login to primary and receive SQL server not available errors
3) The clients slowly start to connect and succeed without errorson the secondary.
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5) When we failback to the primary, it all happens within a few seconds (no problems)

If we recycle IIS, this problem goes away

Here's what we have tried
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And yes, we are running a script to sync up the SIDS so that doesn't appear to be a problem. What seems to be happening is the primary server is getting stuck in the ADO.NET application memory. The problem is we don't know how to fix it.

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Regards

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HTML Code:
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