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E-Series: systemd attempts to unmount filesystem after path failure on Linux

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Applies to

  • Linux 
  • Red Hat Enterprise Linux (RHEL) 7.0, 7.1 or 7.2
  • SUSE 12.0, 12.1
  • DMMP

Issue

systemd attempts to unmount the filesystem after a path failure (with other paths still online):

In the following example, systemd attempts to unmount /iomnt-mpathcw (multipath device mpathcw) shortly after a path is restored, bringing current paths to 3:

Jan 20 11:17:23 ICTM19Z1S02H3.ict.englab.netapp.com multipathd[1822]: mpathcw: sdgo - rdac checker reports path is up
Jan 20 11:17:23 ICTM19Z1S02H3.ict.englab.netapp.com multipathd[1822]: 132:64: reinstated
Jan 20 11:17:23 ICTM19Z1S02H3.ict.englab.netapp.com multipathd[1822]: mpathcw: remaining active paths: 3
Jan 20 11:17:23 ICTM19Z1S02H3.ict.englab.netapp.com multipathd[1822]: mpathcw: load table [0 37748736 multipath 4 pg_init_retries 50 queue_if_no_path retain_attached_hw_handler 1 rdac 3 2 service-time 0 1 1 68:32 1 service-time 0 1 1 132:64 1 service-time 0 2 1 134:64 1 70:32 1]


systemd attempts to unmount:

Jan 20 11:17:26 ICTM19Z1S02H3.ict.englab.netapp.com systemd[1]: Trying to enqueue job iomnt\x2dmpathcw.mount/stop/replace
Jan 20 11:17:26 ICTM19Z1S02H3.ict.englab.netapp.com systemd[1]: Installed new job remote-fs.target/stop as 1850
Jan 20 11:17:26 ICTM19Z1S02H3.ict.englab.netapp.com systemd[1]: Installed new job iomnt\x2dmpathcw.mount/stop as 1849
Jan 20 11:17:26 ICTM19Z1S02H3.ict.englab.netapp.com systemd[1]: Enqueued job iomnt\x2dmpathcw.mount/stop as 1849
Jan 20 11:17:26 ICTM19Z1S02H3.ict.englab.netapp.com systemd[1]: dev-disk-by\x2did-dm\x2duuid\x2dmpath\x2d360080e50002909c400007a255695b068.device changed plugged -> dead
Jan 20 11:17:26 ICTM19Z1S02H3.ict.englab.netapp.com systemd[1]: dev-disk-by\x2did-dm\x2dname\x2dmpathcw.device changed plugged -> dead
Jan 20 11:17:26 ICTM19Z1S02H3.ict.englab.netapp.com systemd[1]: dev-dm\x2d37.device changed plugged -> dead
Jan 20 11:17:26 ICTM19Z1S02H3.ict.englab.netapp.com systemd[1]: sys-devices-virtual-block-dm\x2d37.device changed plugged -> dead

 

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