[LU-17306] LAST ID synchronization between MDT-OST

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.16.0
• Affects Version/s: Upstream
• Labels: patch
• Severity: 3
• Assignee: Alexander Boyko
• Reporter: Alexander Boyko

Description

During the cleanup orphan phase after MDT start, reconnection leads to unsynchronized last id between MDT and OST. This means that MDT could assign non existing objects to a client for a file create operation.

Oct 25 15:20:31 capstorn075 kernel: LustreError: 358076:0:(ofd_dev.c:1570:ofd_create_hdl()) capstor-OST0087: dropping old orphan cleanup request
Oct 25 15:22:20 capstorn075 kernel: Lustre: capstor-OST0087: MDS LAST_ID [0x2540000400:0xb6941:0x0] (747841) is 352 behind OST LAST_ID [0x2540000400:0xb6aa1:0x0] (748193), trust the OST