A brand new test environment is up and running and the gateway application is now working as expected.
So, for me it appears to have been a problem with something in RHEL 6.10 or something we did to it. I do not recall seeing a requirement for RHEL 7 in the documentation just that “linux” was supported. I would not be entirely surprised if I have managed to miss this though.
Anyway, all good now, except I will have to upgrade the production SHCluster nodes to RHEL 7 as well... which really had to be done anway... i have just been putting it off!
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