Bug Check 0x133 DPC_WATCHDOG_VIOLATION error on Lync/Skype for Business Edge server


When a Microsoft Lync or Skype for Business (any version) Edge server is running on modern hardware with multiple processor groups enabled, the computer crashes with the following Bug Check 0x133 DPC_WATCHDOG_VIOLATION error:

Time:     6/24/2016 6:28:09 AM 
ID:       1001
Level:    Error
Source: Microsoft-Windows-WER-SystemErrorReporting
Machine:  USIDMLLYC203

Message: The computer has rebooted from a bugcheck. The bugcheck was: 0x00000133 (0x0000000000000000, 0x0000000000000501, 0x0000000000000500, 0x0000000000000000). A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 062416-18468-01.


This issue occurs because low-level Edge server code is specifically designed to work with hardware that's configured for only a single processor group. This low-level code resides in the Media Relay driver component on Edge servers.


To avoid this issue, disable the "processor groups" feature in the Edge server's BIOS.

More Information

For more information about this error, see Bug Check 0x133 DPC_WATCHDOG_VIOLATION.

To disable multiple processor groups, go to the "Numa Configuration" section in the BIOS. By default, Numa Configuration is set to Clustered on some modern systems, which creates multiple processor groups. Set this option to flat.

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