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Any tricks for simulating a "Connection Timeout Expired" message?


Any tricks for simulating a "Connection Timeout Expired" message?

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mk_rp
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wondering if anyone, during their travels, has ever found a way to simulate a "Connection Timeout Expired" message.
It's to help reproduce a problem I'm trying to debug in our app, and it would be great if I could force this error at-will.

thanks in advance
Grant Fritchey
Grant Fritchey
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Try using the WAITFOR command in T-SQL. That'll pause the execution of the query and you should see a timeout.

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mister.magoo
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Grant Fritchey (4/29/2014)
Try using the WAITFOR command in T-SQL. That'll pause the execution of the query and you should see a timeout.


Except that will be a Command Timeout, not a Connection Timeout.

Forcing a connection timeout could be as simple as adding a fake ip address to the hosts file on the test client machine for the DB Server, so that it never connects OR creating an alias on the client machine to achieve the same misdirection.

MM


select geometry::STGeomFromWKB(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  • mk_rp
    mk_rp
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    Thanks both of you! I should have thought of: "Forcing a connection timeout could be as simple as adding a fake ip address to the hosts file on the test client machine for the DB Server"

    That was the ticket.

    -MK
    mister.magoo
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    Glad to help, and I hope your debugging goes well!

    MM


    select geometry::STGeomFromWKB(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  • Grant Fritchey
    Grant Fritchey
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    mister.magoo (4/29/2014)
    Grant Fritchey (4/29/2014)
    Try using the WAITFOR command in T-SQL. That'll pause the execution of the query and you should see a timeout.


    Except that will be a Command Timeout, not a Connection Timeout.

    Forcing a connection timeout could be as simple as adding a fake ip address to the hosts file on the test client machine for the DB Server, so that it never connects OR creating an alias on the client machine to achieve the same misdirection.


    Well, the command shouldn't time out with defaults set within SQL Server, but your answer is what the OP wanted.

    ----------------------------------------------------
    The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood...
    Theodore Roosevelt

    The Scary DBA
    Author of: SQL Server Query Performance Tuning and SQL Server Execution Plans
    Product Evangelist for Red Gate Software
    Go


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