When the lustre servers have OST configured with multipath devices, there are I/O errors that can lead to a server crash.
The following error appears in the system log:
Mar 31 00:02:44 oss01 kernel: blk_cloned_rq_check_limits: over max size limit.
Mar 31 00:02:44 oss01 kernel: device-mapper: multipath: Failing path 8:160.

Followed by several I/O errors
Mar 31 00:17:30 oss01 kernel: blk_update_request: I/O error, dev dm-17, sector 1182279680
Mar 31 00:17:30 oss01 kernel: blk_update_request: I/O error, dev dm-17, sector 1182291968
Mar 31 00:17:30 oss01 kernel: blk_update_request: I/O error, dev dm-17, sector 1182267392
Mar 31 00:17:30 oss01 kernel: blk_update_request: I/O error, dev dm-17, sector 1182304256
Mar 30 21:04:22 oss01 kernel: LDISKFS-fs (dm-17): Remounting filesystem read-only