Hi
What's the Pool configuration? It might be that you are trying to open many
connections and the first sample occurs too soon.
Try either:
1. Setting the connection pool to 1s and make sure you have a single thread
in your thread group.
2. Put a sleep of couple of seconds before the first JDBC sample occurs.

Best,
Shmuel Krakower.
www.Beatsoo.org - re-use your jmeter scripts for application performance
monitoring from worldwide locations for free.


On Tue, Jan 8, 2013 at 8:56 AM, Dzmitry_Kashlach
<[email protected]>wrote:

>    I have tried this approach. As I can understand, if I set port as Test
> Plan variable - it works. But I have another issue, related to reading data
> from database.
> and that is what I've received, when I run test-plan for the first time:
>
> <http://jmeter.512774.n5.nabble.com/file/n5715742/10.jpg>
>
>   At the same time, SQL query is processed correctly when I run test-plan
> for the second time, third time, etc.
> It seems like the problem is very similar to the issue with database port,
> but I cannot understand, how to fix it.
>   Does anybody have any ideas?
>
>
>
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