title: CRM 365 multiple Sandbox Worker Processes
body: <p>After updating our CRM 2016 environment to version 8.2.1.176 (Dynamics 365) we encountered the CallManagerInfo error described by Maco in this question <a href="https://stackoverflow.com/questions/42764033/crm-365-callmanagerinfo-error-in-plugins">CRM 365 callManagerInfo error in plugins</a>.</p>
  
  <p>So I tried out the solution provided and set the registry key on both our application servers. This seemed to fix the problem but now I'm coming across another issue.
  I already noticed that in the eventlog of the application servers sometimes errors came up about "Invalid Trace directory" but because I wasn't using tracing at the moment I ignored it at first.</p>
  
  <p>Then one of our application servers was getting extremely slow and I had trouble connecting to it via RDP. It calmed down after some more minutes and I checked a few things and then saw that there were quite a lot Sandbox Worker Processes running. Restarting the Sandbox Processing Service didn't really help because after a few seconds there were again a lot of Worker Processes running and also the tracing eventlog error messages came up again.</p>
  
  <p>After some searching I found some suggestions to set tracing on and set some other regkeys but nothing helped so far. Everything I tried is described in this blog post <a href="https://blog.qualtechsoftware.com/high-number-of-sandbox-worker-processes-dynamics-365/" rel="nofollow noreferrer">https://blog.qualtechsoftware.com/high-number-of-sandbox-worker-processes-dynamics-365/</a></p>
  
  <p>But what I found out is that when I set the Singlebox regkey from the callManagerInfo back to 1 and restart the service only one Worker process will run. The name of the regkey seems to imply something like that. :)</p>
  
  <p>I'm not completely sure yet if the many Worker Processes caused the slow-down but on one server there are already over 80 precesses running which doesn't look right to me. I changed the regkey now back to the old value in our QA environment but I'm pretty sure that then the CallManagerInfo errors will come up again.</p>
  
  <p>So is this there any way to get rid of both problems?
  I also activated tracing for some because it was suggested in the article and when checking the files they contained this</p>
  
  <pre><code>[2017-09-08 14:57:03.371] Process:Microsoft.Crm.Sandbox.WorkerProcess |Organization:00000000-0000-0000-0000-000000000000 |Thread:   13 |Category: Exception |User: 00000000-0000-0000-0000-000000000000 |Level: Error |ReqId: 00000000-0000-0000-0000-000000000000 |ActivityId:     b2b6cdd8-4dee-4b05-827e-a83887cc2f9e | WarmUpMockListener.Execute  ilOffset = 0x1A
      at WarmUpMockListener.Execute(SandboxCallInfo callInfo, SandboxSdkContext requestContext, String operation, Byte[] serializedRequest)  ilOffset = 0x1A
      at   ilOffset = 0xFFFFFFFF
      at SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]&amp; outputs)  ilOffset = 0x222
      at DispatchOperationRuntime.InvokeBegin(MessageRpc&amp; rpc)  ilOffset = 0xC4
      at ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&amp; rpc)  ilOffset = 0x48
      at MessageRpc.Process(Boolean isOperationContextSet)  ilOffset = 0x65
      at Wrapper.Resume(Boolean&amp; alreadyResumedNoLock)  ilOffset = 0x1B
      at ThreadBehavior.ResumeProcessing(IResumeMessageRpc resume)  ilOffset = 0x8
      at ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)  ilOffset = 0x79
      at ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)  ilOffset = 0x9
      at QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()  ilOffset = 0x33
      at ThreadPoolWorkQueue.Dispatch()  ilOffset = 0xA4
  &gt;Crm Exception: Message: Test, ErrorCode: -2147220970
  </code></pre>
  
  <p>The message "Test" doesn't look like it intended. So it looks like some kind of bug in the Sandox Service. :(</p>
  
  <p>Any suggestions?</p>