few of the ArcGIS Server instance unable to start

[Ramakrishnankamal_raj]

We have two ArcGIS servers 10.2.2 configured under a site, publishing the same set of services.  At times while we restart the service some of the services in any of the server fails to initiate (this occurs very intermittently).  Under the server logs we could observer the following. 

Unable to instantiate class for xml schema type: CIMDEGeographicFeatureLayer

Invalid xml registry file: d:\program files\arcgis\server\bin\XmlSupport.dat

Unable to instantiate class for xml schema type: CIMGISProject

Invalid xml registry file: d:\program files\arcgis\server\bin\XmlSupport.dat

Unable to instantiate class for xml schema type: CIMDocumentInfo

Invalid xml registry file: d:\program files\arcgis\server\bin\XmlSupport.dat

Thanks,

Kamal Raj

[StevenGraf1]

You might check your Ram and CPU usage on that machine.  If they are maxing out, your services will fail to start.

-Steven

[Ramakrishnankamal_raj]

Thanks Steve for your inputs. But our servers are using only 35% of RAM

and 10% CPU in an average.

[StevenGraf1]

Check out this post.  It has a lot of good information.  There is also a comment with the same exact error messages you have.  How many services are you running on your site?

Large ArcGIS Server 'Site': stability issues

-Steven