DM-Multipath failing device paths after encountering SCSI reservations.
Issue
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SCSI Reservations are causing multipath to fail even if there is no issue with underlying storage devices.
This issue is present only with kernel versions older thankernel-3.10.0-693.el7
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Numerous scsi devices failing and path flapping errors recorded during SCSI persistence reservations events on multipath device:
Dec 11 11:56:33 server1 kernel: sd 12:0:0:14: reservation conflict Dec 11 11:56:33 server1 kernel: sd 12:0:0:14: [sdar] tag#1 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK Dec 11 11:56:33 server1 kernel: sd 12:0:0:14: [sdar] tag#1 CDB: Write(10) 2a 00 59 fd ae 38 00 00 10 00 Dec 11 11:56:33 server1 kernel: blk_update_request: critical nexus error, dev sdar, sector 1509797432 Dec 11 11:56:33 server1 kernel: [416008.400797] device-mapper: multipath: Failing path 66:176. Dec 11 11:56:33 server1 kernel: device-mapper: multipath: Failing path 66:176. Dec 11 11:56:33 server1 multipathd: sdar: mark as failed Dec 11 11:56:33 server1 multipathd: <wwid>: remaining active paths: 3 [...] Dec 11 11:56:33 server1 multipathd: <wwid>: remaining active paths: 2
Environment
- Red Hat Enterprise Linux 7
- kernel versions older than
kernel-3.10.0-693.el7
- kernel versions older than
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