Intermittent NullReferenceException in asp.net identity

Asked Jun 16 '17 at 10:24

Active Jun 16 '17 at 11:04

Viewed 39 times

I am seeing an intermittent issue that we cannot reliably reproduce in ASP.NET Identity (MVC 5.2.3).

The top of the stack trace suggests the issue is occurring on retrieving the password hash from the database:

System.NullReferenceException: Object reference not set to an instance of an object.
    at Portal.Web.Identity.IdentityStorageContext.<>c.<get_PasswordHash>b__6_0()
    at System.Threading.Tasks.Task`1.InnerInvoke()
    at System.Threading.Tasks.Task.Execute()

SQL server isn't logging any errors. Trying the action again succeeds. We have noticed it occuring on both live and pre-prod.

IdentityStorageContext.cs extract:

public Task<string> PasswordHash
{
     get { return Task<string>.Factory.StartNew(() => identityUser.PasswordHash); }
}

Any ideas?

edited Jun 16 '17 at 11:04

asked Jun 16 '17 at 10:24

m.edmondson

30,382
27
123
206

Is `Portal.Web.Identity.IdentityStorageContext` yours? – Patrick Hofman Jun 16 '17 at 10:31
Yes, I've added the code above – m.edmondson Jun 16 '17 at 11:03
I guess `identityUser` is null then. – Patrick Hofman Jun 16 '17 at 11:05
@Patrick Hofman - I know what a null reference is! I was looking for ideas on how to debug an intermittent issue. – m.edmondson Jun 16 '17 at 12:33
Use exception handling together with a logging framework. Nothing else we can make from this. Sorry. – Patrick Hofman Jun 16 '17 at 12:35

Intermittent NullReferenceException in asp.net identity

0 Answers0