OCSG Cluster Mode Failover Time Too Long
(Doc ID 2002729.1)
Last updated on AUGUST 24, 2020
Applies to:Oracle Communications Services Gatekeeper - Version 188.8.131.52 to 5.1.0 [Release 5.0 to 5.1]
Information in this document applies to any platform.
When one Oracle Communications Services Gatekeeper (OCSG) Network Tier (NT) node experiencea hardware/network crashes, like unplug cable or reboot machine, the Application Tier (AT) is out of service for a period of time.
Even after turning the cluster heartbeat “period length” to minimum value, the time is around 20 seconds.
It's not acceptable if the out of service time is more than 1 second in active-active deployment.
High Availability (HA) tests in 2x2 cluster environment.
1) REST / Parlay QoS-applyQos: Disable Ethernet of one NT during traffic run
2) REST / Parlay QoS-applyQos: shutdown of one NT Server during traffic run
Both cases fais with below symptoms:
Requests sent to AT1 and AT2 get no response,no matter what kind communication services.
This symptoms last for about 5 minutes, after this period of time the system recovers.
Killing the NT server doesn't have such service interrupt issue
Same issue observed on OCSG 184.108.40.206 and 5.1.
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