nHibernate session and multithreading

Question

I had a method with a lot of persistence calls that used a nHibernate session, it worked, was alright. But I needed to refactor this method, extracting a method from a conte

Answer 1

Sessions are not thread safe in NHibernate by design. So it should be ok as long as you have a session used by only one thread.

I'm not sure what you're thingResolver does, but if it does some persistance calls on the same session you've created in the originating thread - this most probably the cause of your problems, you could create a separate session in your new thread so that it would be a session per thread if my assumption is true.

NHibernate reference has it in section 10.2

http://nhibernate.info/doc/nh/en/index.html#transactions

Answer 2

You can have one NHibernate SessionFactory for multiple threads as long as you have a separate NHibernate session for each thread.

here is an example that will give exceptions because it uses the same session for each thread:

https://forum.hibernate.org/viewtopic.php?p=2373236&sid=db537baa5a57e3968abdda5cceec2a24

The solution is to store sessions on the LocaldataStoreSlot, that way you can have a session-per-request model.