When the DFSR service crashes, Distributed File System Replication (DFSR) replication is stopped, and event ID 1000 is logged in the event log. The log entry resembles the following:
If you installed May 2016 update rollup 3156418 on Windows Server 2012 R2, the DFSRS.exe process may consume a high percentage of CPU processing power (up to 100 percent). This may cause the DFSR service to become unresponsive to the point at which the service cannot be stopped. When this problem occurs, you must hard-boot affected computers to restart them.
To fix these problems, install the July 2016 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2.
Microsoft has confirmed that these are problems in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.