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Download and update of DAT file causing Rockwell FactoryTalk dual redundant servers to switch

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I have a couple of virtual servers with Windows 2016 Standard operating system. The servers are configured as dual redundant FactoryTalk HMI servers (FT View Site Edition V11.00).

Each morning at approximately 10:02, the servers switch over from ACTIVE to STANDBY, so for example, if server01 is ACTIVE, it switches to STANDBY and server02 which was STANDBY switches to ACTIVE. It happens every morning, even though there are no stored procedures or scheduled tasks to do this on any of the servers.

Some investigation has shown that at this time, McAfee EPo AV (V8.8) downloads and installs its daily DAT file. When this happens, the RNASERVER.EXE on the ACTIVE server starts communicating to all FactoryTalk clients, spikes the bandwidth, loses connection to the clients and switches to the STANDBY server.

Has anyone else seen this happening, and more importantly, how did you stop it from happening?

Whats the connection between the rnaaeserver.exe and the DAT update that send it into a bandwidth spike?
 

 

 
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Re: Download and update of DAT file causing Rockwell FactoryTalk dual redundant servers to switch

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Hi

I found the issue. It was CPU and RAM resources on the two servers. Although they met the recommended Rockwell specification, that recommendation does not take into account what the IT department also run on the servers, ie Anti Virus protection and backups.

The specs are now 8 cores with 16Gb RAM with Win Server 2016.

Martin.

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Re: Download and update of DAT file causing Rockwell FactoryTalk dual redundant servers to switch

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Hi @MartinShaw66 

Regarding cluster type environment please check https://kc.mcafee.com/corporate/index?page=content&id=KB52783

Both the server should have same VSE version. If it is already there then I am expecting due to McScript_inuse.exe invocation during the DAT update time there is a spike happening causing the failover.

You can Follow the article KB66044 and check the status.

If the issue persist the I would suggest to open a SR with us so that we can do further check. 

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Re: Download and update of DAT file causing Rockwell FactoryTalk dual redundant servers to switch

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Unfortunately, the links you suggest refer to cluster failover. This is not what I am experiencing.

When the DAT updates, RNAAESERVER.EXE somehow gets overloaded which causes a failover of the FactoryTalk application. I think this is a specific issue with the Rockwell software and its reaction to the way McAfee updates its DAT files.

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Re: Download and update of DAT file causing Rockwell FactoryTalk dual redundant servers to switch

Jump to solution

Hi

I found the issue. It was CPU and RAM resources on the two servers. Although they met the recommended Rockwell specification, that recommendation does not take into account what the IT department also run on the servers, ie Anti Virus protection and backups.

The specs are now 8 cores with 16Gb RAM with Win Server 2016.

Martin.

View solution in original post

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