DB Connection Timeout simulation

Is there an way to simulate a db connection timeout?

I'm encounter开发者_高级运维ing problems with a timeouted db connection on a productive system and need to simulate a similar situation.

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One way that this could be simulated is by killing the connection directly in the database:

Oracle:

select * from v$session
where machine like '%machinename%'
order by sid desc

-- SID, SERIAL
alter system kill session '1080,16345'

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Try to connect to a non-existing host or port, and you will get the connection timeout.