Hi Marc,

Thank you so much.

Unfortunately the error still occurs, but slightly different.

I've the following code inside my Transforming event:

private void IndexProviderSiteIndexOnTransformingIndexValues(object sender, IndexingItemEventArgs e)
        {
            using (var scope = _scopeProvider.CreateScope(autoComplete: true))
            {
                using (var umbracoContextReference = _contextFactory.EnsureUmbracoContext())
                {
                    var tagService = Current.Factory.GetInstance<ITagService>();

                    var tags = tagService.GetAllTags(null, "en-US");

                    if (e.ValueSet.Category == IndexTypes.Content)
                    {
                        Parse(e);
                    }
                }
            }
        }

Exception was thrown on the closing curly brance of the using (var scope = _scopeProvider.CreateScope(autoComplete: true)) line with the following error:

System.NullReferenceException: 'Object reference not set to an instance of an object.'

I had a look at the Log Viewer and there I found this log entry:

Error indexing queue items System.NullReferenceException: Object reference not set to an instance of an object. at Umbraco.Core.Scoping.Scope.<>cDisplayClass71_0.2() in d:\a\1\s\src\Umbraco.Core\Scoping\Scope.cs:line 437 at Umbraco.Core.Scoping.Scope.TryFinally(Int32 index, Action[] actions) in d:\a\1\s\src\Umbraco.Core\Scoping\Scope.cs:line 472 at Umbraco.Core.Scoping.Scope.TryFinally(Int32 index, Action[] actions) in d:\a\1\s\src\Umbraco.Core\Scoping\Scope.cs:line 476 at Umbraco.Core.Scoping.Scope.TryFinally(Int32 index, Action[] actions) in d:\a\1\s\src\Umbraco.Core\Scoping\Scope.cs:line 476 at Umbraco.Core.Scoping.Scope.RobustExit(Boolean completed, Boolean onException) in d:\a\1\s\src\Umbraco.Core\Scoping\Scope.cs:line 420 at Umbraco.Core.Scoping.Scope.Dispose() in d:\a\1\s\src\Umbraco.Core\Scoping\Scope.cs:line 363

Another problem related to this is that is seems taht the following error 'randomly' occurs:

An error occured
Lock request time out period exceeded. The statement has been terminated.

Exception Details
System.Data.SqlClient.SqlException: Lock request time out period exceeded. The statement has been terminated.

Another thing I currently don't understand is that when I attach the debugger and add a breakpoint to the using (var scope line on the Slave Umbraco and then publish a page on the Master Umbraco, the breakpoint will hit once, but I got two null reference exceptions on the closing curly brace of the using (var scope line.

So I'm totally confused right now. Thanx for any further help or suggestions.

Corne

Small update:

When I add a Thread.Sleep of 2 seconds as the first line of code inside the TransformingValues method it works fine.

Also I tested the replica with blanc umbraco 8.6.3 installation with only the search stuff: IndexComponent, Composer and a ServerRegistrar instance to tell Umbraco which installation replica or master.

Very weird..

Also, I see a lot of messages in the log now when using scopeprovider without actually doing stuff with the scope:

Missed "ScopeContext" Object "0d7ee66e"

Hi Corné,

Did you ever get this resolved? We're running into a similar issue and have a feeling this eventually leads to Examine index failures. WIll be good to know if you had this sorted on your end and possibly share some insights.