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** [tickets:#2920] amfd: cyclic SC reboot after split brain**
**Status:** unassigned
**Milestone:** 5.18.08
**Created:** Thu Aug 30, 2018 03:33 AM UTC by Gary Lee
**Last Updated:** Thu Aug 30, 2018 03:33 AM UTC
**Owner:** nobody
After a split network event, both SCs can reboot endlessly, due to this
assertion:
2018-08-29 18:05:34.689 SC-2 osafamfd[263]: src/amf/amfd/sg_2n_fsm.cc:596:
avd_sg_2n_act_susi: Assertion 'a_susi_1->su == a_susi_2->su' failed.
2018-08-29 18:05:34.695 SC-2 osafamfnd[273]: ER AMFD has unexpectedly crashed.
Rebooting node
To reproduce, enable SC absence, and split a network into two partitions.
Partition 1 contains SC-1, PL-3
Partition 2 contains SC-2, PL-4,PL-5
Before the split, PL-3 is active for a 2N SG. PL-4 is standby.
During the split, SC-2 may assign PL-4 to be active.
After the network merges, SC-1 and SC-2 may both reboot after they detect spilt
brain.
`2018-08-30 13:30:15.008 SC-2 osafrded[178]: Rebooting OpenSAF NodeId = 0 EE
Name = No EE Mapped, Reason: Split-brain detected, OwnNodeId = 131599,
SupervisionTime = 60`
Then PL-3 and PL-4 will sync these duplicated active assignments to AMFD, and
cause the assertion in AMFD.
The user must then manually recover the cluster by doing a cluster reboot, or
rebooting one of PL-3 / PL-4.
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