Multipath failing paths with the `blk_cloned_rq_check_limits: over max segments limit` errors

Solution Verified - Updated -

Issue

  • Continuous path flapping observed for DM-multipath devices in the logs following the over max segments limit errors.

    host1 kernel: [990993.139225] blk_cloned_rq_check_limits: over max segments limit.
host1 kernel: [990993.167545] device-mapper: multipath: Failing path 67:96.
host1 multipathd: 67:96: mark as failed
host1 multipathd: mpatha: Entering recovery mode: max_retries=6
host1 multipathd: mpatha: remaining active paths: 0
host1 multipathd: maptha: sdaf - tur checker reports path is up
host1 multipathd: 67:96: reinstated
host1 multipathd: mpatha: queue_if_no_path enabled
host1 multipathd: mpatha: Recovered to normal mode
host1 multipathd: mpatha: remaining active paths: 1

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • SAN LUNs with DM-Multipathing.
  • Systems with Emulex FC HBA

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