SearchExecutor.ExecuteQueries - Bug in SPO

Hi,

unfortunately I have fallen in this deep rabbit hole to have to report a bug in SPO - which I could not do successfully complete since three weeks as one support team after the other just tell me thats not in their responsibility

😞 

Scenario:

We use JSOM to send one request via the SearchExecutor which contains multiple keyword queries.

Results:

In approx 10-20% of all cases, the response is fine - each keyword query has results/no error - in all other cases only one query returns results but all other return a server-side SPException.

The query exception details are:

Message:

Attempted to make calls on more than one thread in single threaded mode. (Exception from HRESULT: 0x80010102 (RPC_E_ATTEMPTED_MULTITHREAD))

Stack trace:

   at Microsoft.SharePoint.SPGlobal.HandleComException(COMException comEx)   at Microsoft.SharePoint.Library.SPRequest.FetchActiveFeaturesFromSessionCache(String bstrUrl, Int32 scope, ISP2DSafeArrayWriter p2DWriter)   at Microsoft.SharePoint.SPWeb.FetchActiveFeaturesFromRequest(SPFeatureScope scope)   at Microsoft.SharePoint.SPFeatureCollection.FetchActiveFeaturesFromSessionCache(SPWeb webCachedSession)   at Microsoft.SharePoint.SPFeatureCollection.EnsureFeaturesData(Boolean force)   at Microsoft.SharePoint.SPFeatureCollection.get_Item(Guid featureId)   at Microsoft.SharePoint.Publishing.PublishingHttpModule.IsSitePublishingSite(SPSite site)   at Microsoft.SharePoint.Publishing.CatalogUrlRewriter.GetCatalogPropertiesToRetrieve(SPContext currentSPContext)   at Microsoft.Office.Server.Search.Query.Query.PreQueryAppendProperties()   at Microsoft.Office.Server.Search.Query.Query.ExecuteQuery()   at Microsoft.Office.Server.Search.Query.SearchExecutor.ExecuteQueryInternal(Query query, SearchExecutorLogEvent evt)   at Microsoft.Office.Server.Search.Query.SearchExecutor.ExecuteQueryTask(Query query, Guid correlationId, Guid parentCorrelationId, WindowsIdentity windowsIdentity, SearchExecutorLogEvent evt)   at Microsoft.Office.Server.Search.Query.SearchExecutor.<>c__DisplayClass38_1.<ExecuteQueries>b__0(Object obj)   at System.Threading.Tasks.Task`1.InnerInvoke()   at System.Threading.Tasks.Task.Execute()

This happens on three different tenants and is totally independent from the search keyword itself - sending the same query multiple times returns sometimes 1 of 3 successfully, sometimes 1 of 8 ...

I would be really glad to get the right direction / contact / whatsoever to report this issue - and provide a repro / demonstration if necessary.

Thanks in advance

Rainer