[LU-4966] handle server registration errors gracefully

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Labels: llnl
• Assignee: WC Triage
• Reporter: Niu Yawei (Inactive)

Description

If some server registered successfully on MGS, but it got an error registration reply (MGS revoking config locks timeout or other networking problems), then the server will always get -EADDRINUSE error when it try to register next time, because the server index has been occupied on MGS in the first registration.

Current solution for above situation is to use writeconf option to force registration.

We need to get this improved and make MGS able to handle this gracefully.

Issue Links

• is related to: LU-1257 OST registration snafu
• is related to: LU-9838 target registration mount fails with -108 but then succeeds if retried immediately
• is related to: LU-15112 attempt to register an OST with duplicated index should fail but it does not
• is related to: LU-14928 Allow MD target re-registered after writeconf
• is related to: LU-17240 change test-framework to format and mount targets in parallel