NHibernate exception "Session is closed! Object name: 'ISession'."

Question

I am getting the folloinwg error from NHibernate:

System.ObjectDisposedException: Session is closed! Object name: 'ISession'.
   at NHibernate.Impl.AbstractSessionImpl.ErrorIfClosed()
   at NHibernate.Impl.AbstractSessionImpl.CheckAndUpdateSessionStatus()
   at NHibernate.Impl.SessionImpl.FireSave(SaveOrUpdateEvent event)
   at NHibernate.Impl.SessionImpl.Save(Object obj)

I am using NHibernate in .net windows service.
I am not able to trace the excact problem for the exception. This exception occurs very often.
Any one can help me on this to fix this exception?

nrk

Yes.. I am opening the connection. Actually i am doing a file import application, in that I am doing record insertion batch-wise (200) with session and commiting the session and those records are available in DB also,, but after 2 or 3 batches it's giving this exception. I am not able to figure it out. — nRk
– nRk, Commented Mar 31, 2010 at 12:28

Berryl · Accepted Answer · 2010-03-31 14:05:50Z

6

I am guessing you are wrapping your session in a using construct more than once, something like below. Can you post some of your session usage code?

HTH,
Berryl

Wrong - the session is closed after the first using construct:

using(var session = _sessionFactory.GetCurrentSession()
using(var tx = _session.BeginTransaction(){
    ... do something
    tx.Commit();
}


using(var session = _sessionFactory.GetCurrentSession()
using(var tx = _session.BeginTransaction(){
    ... do something else
}

Better- the session is closed after it's work is done

var session = _sessionFactory.GetCurrentSession();

using(var tx = _session.BeginTransaction(){
    ... do something
    tx.Commit();
}


using(var tx = _session.BeginTransaction(){
    ... do something else
    tx.Commit()
}
session.Close()

answered Mar 31, 2010 at 14:05

Berryl

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UpTheCreek · Accepted Answer · 2010-03-31 12:31:23Z

2

As the error says - it looks like you are trying to save an object when your ISession is closed. Are you sure you are opening it? Or perhaps it is being closed prematurely?

Update: Have you checked the NHibernate Logs?

edited Mar 31, 2010 at 12:31

answered Mar 31, 2010 at 12:24

UpTheCreek

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4 Comments

nRk Over a year ago

looks similar like that, but making cascading= none fixed the issue.

UpTheCreek Over a year ago

Glad you got it working. If I were you though, I'd be sure to take a look at the nhibernate log4net logs, to maybe get some more info in whats going on, see: stackoverflow.com/questions/743323/nhibernate-enabling-log4net

UpTheCreek Over a year ago

@vapcguy See above link

vapcguy Over a year ago

@UpTheCreek - Thanks -- in other words, ensure you're logging them yourself, using log4NET, or other.

vapcguy · Accepted Answer · 2014-09-19 21:51:25Z

0

We had this same issue. Changing the App Pool Managed Pipeline to Classic solved it for us.

answered Sep 19, 2014 at 21:51

vapcguy

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