When IB SM Master Failover happens Exalogic side the external request reaches to OTD VIP fails and only recovers after 15 min

(Doc ID 2347519.1)

Last updated on JANUARY 12, 2018

Applies to:

Oracle Traffic Director - Version 11.1.1.7.0 and later
Information in this document applies to any platform.

Symptoms

when IB SM failover happens Exalogic side and during this period of time, the OTD backup server/keepalived attempts to become Master and Primary OTD server/keepalived become Backup. But after SM master-backup heartbeats resume the OTD VIP gets transfer to Primary and here are the entries shows in messages file.

Dec 10 13:23:03 pnap09 kernel: [mlx4_vnic] Received event 0x11 (device mlx4_0 port 1)
Dec 10 13:23:03 pnap09 kernel: [mlx4_vnic] Received event 0x11 (device mlx4_0 port 2)
Dec 10 13:23:07 pnap09 Keepalived_vrrp[31259]: VRRP_Instance(otd-vrrp-router-1) Transition to MASTER STATE
Dec 10 13:23:07 pnap09 Keepalived_vrrp[31127]: VRRP_Instance(otd-vrrp-router-1) Transition to MASTER STATE
Dec 10 13:23:07 pnap09 Keepalived_vrrp[30397]: VRRP_Instance(otd-vrrp-router-1) Transition to MASTER STATE
Dec 10 13:23:08 pnap09 Keepalived_vrrp[31259]: VRRP_Instance(otd-vrrp-router-1) Entering MASTER STATE
Dec 10 13:23:08 pnap09 Keepalived_vrrp[31127]: VRRP_Instance(otd-vrrp-router-1) Entering MASTER STATE
Dec 10 13:23:08 pnap09 Keepalived_vrrp[30397]: VRRP_Instance(otd-vrrp-router-1) Entering MASTER STATE
Dec 10 13:23:12 pnap09 Keepalived_vrrp[30397]: VRRP_Instance(otd-vrrp-router-1) Received higher prio advert
Dec 10 13:23:12 pnap09 Keepalived_vrrp[30397]: VRRP_Instance(otd-vrrp-router-1) Entering BACKUP STATE
Dec 10 13:23:12 pnap09 Keepalived_vrrp[31259]: VRRP_Instance(otd-vrrp-router-1) Received higher prio advert
Dec 10 13:23:12 pnap09 Keepalived_vrrp[31259]: VRRP_Instance(otd-vrrp-router-1) Entering BACKUP STATE
Dec 10 13:23:12 pnap09 Keepalived_vrrp[31127]: VRRP_Instance(otd-vrrp-router-1) Received higher prio advert
Dec 10 13:23:12 pnap09 Keepalived_vrrp[31127]: VRRP_Instance(otd-vrrp-router-1) Entering BACKUP STATE

So when this failover problem happens the external request reaching to OTD Failover VIP fails and no entries logged in OTD server logs. The internal requests reaches to OTD servers.

Cause

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