'.NET v4.5' failed to stop a listener channel for protocol 'http' in the allotted time

I have a Windows Server 2012 R2 Standard running on AWS using IIS 6.2 (Build 9200).

Several times the website stops responding, looking in the event log I found this, not sure if this is the problem but look likely.  Restarting IIS fixes the problem but I have to log into do it.  And of course the site is down the whole time.

Suggestions?  I am running an MVC 5 application.

"A worker process '4360' serving application pool '.NET v4.5' failed to stop a listener channel for protocol 'http' in the allotted time.  The data field contains the error number."

- System
  - Provider
   [Name]  Microsoft-Windows-WAS
   [Guid]  {524B5D04-133C-4A62-8362-64E8EDB9CE40}
   [EventSourceName]  WAS
 - EventID 5138
   [ Qualifiers]  32768
   Version 0
   Level 3
   Task 0
   Opcode 0
   Keywords 0x80000000000000
 - TimeCreated
   [ SystemTime]  2017-08-09T16:17:11.000000000Z
   EventRecordID 54596
   Correlation
 - Execution
   [ ProcessID]  0
   [ ThreadID]  0
   Channel System
   Computer <clipped>
   Security
 - EventData
  AppPoolID .NET v4.5
  ProcessID 4360
  param3 0
  ProtocolID http
   B4050780
--------------------------------------------------------------------------------
Binary data:
In Words
0000: 800705B4   
In Bytes
0000: B4 05 07 80 

Binary data:

In Words

0000: 800705B4

In Bytes

0000: B4 05 07 80 ´..€