No coverage report found after executing tests

[smadala]

Description

• Test run failing with following error in std err

"Object reference not set to an instance of an object.
Test Run Failed."

This is observed in cloudbuild exchange queues.

Steps to reproduce

• Enable code coverage for with multiple vstest.console instances in parallel.
• If time taken to start datacollector.exe more than 5 sec. tests fail with following error.

System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.SocketCommunicationManager.ReceiveMessage()
   at Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.DataCollection.DataCollectionRequestSender.SendBeforeTestRunStartAndGetResult(String settingsXml, ITestMessageEventHandler runEventsHandler)
   at Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.DataCollection.ProxyDataCollectionManager.<>c__DisplayClass13_0.<BeforeTestRunStart>b__0()
   at Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.DataCollection.ProxyDataCollectionManager.InvokeDataCollectionServiceAction(Action action, ITestMessageEventHandler runEventsHandler) Test Run Failed

Expected behavior

Code coverage should generate without any error.

Actual behavior

"Object reference not set to an instance of an object.
Test Run Failed."