System.IO.IOException: Pipe is broken

Hi DrewbleIT,

Thank you for reaching us out, By any chance what was the OS of those machines where you observed this? can you share some event logs? Also any errors being observed on endpoint level?

Good evening, 

The logs noted are at the endpoint level. However we also see broken pipes with MS Exchange and other .net apps.

Win 10

Server 12'/16'

We are also enrolled in the EAP.

We did also open a case which i can share if it would be helpful.

Hi DrewbleIT

Could you please PM me the case number that you have already registered? 

Hello. We have also observed the same behavior within our organization. The Mimecast for Outlook plugin specifically crashes and provides logs just like ignitor's. 

After doing some sleuthing, it appears that the Sophos.Encryption.BitLockerService.exe is using up specific resources that is killing the Mimecast plugin. I have opened a support case with Mimecast, but their solution is to remove or stop Sophos which we obviously do not want to do. I will open a support case with Sophos with more findings.

Hello. We have also observed the same behavior within our organization. The Mimecast for Outlook plugin specifically crashes and provides logs just like ignitor's. 

After doing some sleuthing, it appears that the Sophos.Encryption.BitLockerService.exe is using up specific resources that is killing the Mimecast plugin. I have opened a support case with Mimecast, but their solution is to remove or stop Sophos which we obviously do not want to do. I will open a support case with Sophos with more findings.

We'll test stopping the Sophos.Encryption.BitLockerService.exe internally to help confirm. 

Justin Rutkowski Here's the odd thing for us. This is impacting servers as well and servers do not have Sophos.Encryption.BitLockerService.exe to my knowledge. 

Justin Rutkowski - Are you by chance a Sophos MTR Customer? 

Sophos Support Case 03493304 if needed by members of support. Yes we are MTR Customers.

In my testing it appeared to be this service that was the cause of the error: Sophos Device Encryption Service (it calls upon the Sohops.Encryption.BitlockerService.exe I listed above). I set the service to Manual instead of Automatic Delayed Start, and while Sophos freaked out, I did not receive the Mimecast error. Looks like this service is running/set to Automatic Delayed Start even if the device is not configured with Sophos Bitlocker encryption.

Can you give this a try as well? Disable the MTR service. We had to do this on the server side and are currently testing the workstation side. I currently believe it's the MTR service but we are testing both! 

We confirmed that disabling the MTR service seemed to resolve the issue as well on workstations. Have not tested the encryption service yet. 

Hi Drew, Justin,

I just came across this post from looking for answers!  I finally found so thanks for the post.  What is the latest with your case?  We are also MTR customer and also using the Mimecast Plugin and it started to happen around the same time for our desktops too.  I haven't looked at any of our servers for errors yet.  I have a ticket logged with Mimecast but I guess this will be for Sophos to resolve.

Looking forward to the latest update.  Will play around with the services you mention and report back.

Thanks and Regards (happy new years eve)

Good day Paul Haley-

Unfortunately I have not had any new information from Sophos since confirming that it's related to the MTR service. 

Happy New years eve to you all well!

We are not using encryption, so that service is not present on our systems.  I can also confirm stopping the MTR service stops the msddsk.exe from repeatedly crashing.  BTW you can manually run the process to start it up but will only run for a maximum of 10-15 mins before it faults again.  My Sophos Support Case 03496588.