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Distributed Engine on Linux showing disconnected on FME FLOW

  • April 22, 2026
  • 6 replies
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shraddha.patel
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I have installed FME Core on windows machine and distributed engine on Linux machine. I am getting following error in my logs “ERROR : FME Engine failed to register with FME Flow 'FME-CORE-DEV' on port 7070. Failed to verify message authenticity” Engine appears on FME FLOW but it is not active and always appers as disconnected.

6 replies

hkingsbury
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  • April 22, 2026

It’s not a situation I’m particularly familiar with, but my first thought would be firewalls and networking issues.

I’d also ask the question of is a remote engine better in this scenario than a distributed engine? 

They’re both similar, but interface back to the core in different ways. There’s some additional detail here:

A Guide to Choosing Your FME Flow Deployment Architecture – FME Support Center


shraddha.patel
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  • April 23, 2026

I checked FME Core can communicate with distributed FME Engine. From FME Engine I can able to ping FME CORE. 


shraddha.patel
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  • April 23, 2026

This is what is looks like now
 

 


shraddha.patel
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  • April 23, 2026

Engine is registered with core but it is “Disconnected”


hkingsbury
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  • April 23, 2026

I wouldn’t trust pinging the machine at that uses a seperate protocol (IMCP) to what FME uses (TCP).

It’s better to use the following in powershell (if windows)

Test-NetConnection <ip> -Port <port>

or (in linux)

nc -vz <ip> <port>

With that being said, because the core can see it, it suggests that (some of) the ports are open. I’d suggest checking that all ports listed here (FME Flow Ports) are open between both machines. Note that a port range is also required (specified in fmeFlowConfig)


shraddha.patel
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  • April 24, 2026

Thank you for response. I found the cause. My FME Linux distribution has firewall active and it was blocking incoming traffic.