Nhibernate session is not thread safe.

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


On Friday, 30 October 2020 at 12:46:48 UTC-5 [email protected] wrote:

> Hi,
>
> I'm using rabbitmq and nhibernate in a .net core project. I run 
> asynchronous queries for database operations on some consumers. For 
> example, I am sending a single message to the queue, the message is 
> processed successfully, but when I send 100 messages, database operations 
> start getting errors after a while.
>
> I tested the similar structure as follows. I did database transactions 100 
> times in a loop and it didn't give an error. But when I tried it in 
> parallel loop, it gave an error like in rabbitmq.
>
> Is this from Nhibernate or is there a different logic? Nhibernate not 
> thread-safe?
>
> Sample Code with Error :
>
> Parallel.For(0, 100, async act =>
>             {
>                 var ws = await 
> _workspaceRepository.GetWorkspaceByIdAsync(66);
>                 System.Console.WriteLine($"GetWorkspaceByIdAsync : 
> {ws.Name}");
>                 var keywords = await 
> _workspaceKeywordRepository.GetForbiddenKeywordsByWorkspaceAsync(66);
>                 
> System.Console.WriteLine($"GetForbiddenKeywordsByWorkspaceAsync : 
> {keywords.Count}");
>                 var IsforbiddenKeyword = await 
> HasForbiddenKeywordAsync(66, "facebook", "instagram");
>                 System.Console.WriteLine($"HasForbiddenKeywordAsync : 
> {IsforbiddenKeyword}");
>             });
>

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