[LU-5758] enabling avoid_asym_router_failure prvents the bring up of ORNL production systems

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Affects Version/s: Lustre 2.4.3, Lustre 2.5.3
• Labels: soak
• Environment: Any 2.4/2.5 clients running against 2.4.3 or 2.5.3 servers.

Epic/Theme

ORNL

• Severity: 3
• Assignee: Liang Zhen (Inactive)
• Reporter: James A Simmons

Description

With the deployment of Lustre 2.5 center wide at ORNL we encountered problems being up the production system due to avoid_sym_router_failure
being enabled by default. The LNET fabric would fail to come up when enabled. Once it was turned off by default everything returned to normal. This would a useful feature at have for this scale of a system. This problem can be easily reproduced at smaller scale in both non-FGR and FGR set ups.

Issue Links

• is related to: LU-6060 ARF doesn't detect lack of interface on a router
• is related to: LU-5485 first mount always fail with avoid_asym_router_failure