[LU-7815] pinger thread evict the export between MDTs.

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.9.0
• Affects Version/s: Lustre 2.8.0
• Labels: dne2 soak
• Severity: 3
• Assignee: Di Wang
• Reporter: Di Wang

Description

In DNE failover tests, we found MDT is being evicted by another MDT because of pinger timeout.

Lustre: soaked-MDT0007: haven't heard from client soaked-MDT0004-mdtlov_UUID (at 192.168.1.110@o2ib10) in 230 seconds. I think it's dead, and I am evicting it. exp ffff88080c87d800, cur 1456388330 expire 1456388180 last 1456388100
Lustre: soaked-MDT0006: haven't heard from client soaked-MDT0004-mdtlov_UUID (at 192.168.1.110@o2ib10) in 232 seconds. I think it's dead, and I am evicting it. exp ffff88078f6f3c00, cur 1456388331 expire 1456388181 last 1456388099

which actually should not happen. It looks like we should not add MDS-MDS export to obd_chain_timed list. I will cook a patch soon.