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inactive session blocking other session

User183345Apr 25 2011 — edited Apr 25 2011

Hi,
We have oracle 10.2.0.1 and 10.1.0.2 application server.
At times few sessions wait for tx:enq lock. Upon looking at the blocking session in V$session,the state is inactive and sql_id is null and type is user.How to find out what is the blocking session and what it is doing?The event that is shown is SQL*Net message from client and the state is waiting.

I can kill the session but i want to know why the other sessions are blocked by this inactive one?

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Locked on May 23 2011

Added on Apr 25 2011

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