Oracle Openstack 4.0.1: Logging in Horizon BUI gets "504 Gateway Time-out"

(Doc ID 2369070.1)

Last updated on MARCH 30, 2018

Applies to:

Oracle OpenStack for Oracle Linux - Version OpenStack 4.0.1 and later
Linux x86-64

Symptoms

Logging in Horizon BUI gets below error:
504 Gateway Time-out
The server didn't respond in time. 

Cause

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