multipath devices failing with error - 'blk_cloned_rq_check_limits: over max size limit.'

Solution Verified - Updated -

Issue

  • Every day multipathd loses many paths with blk_cloned_rq_check_limits errors as shown below:

    Jan 11 13:15:09 testhost kernel: blk_cloned_rq_check_limits: over max size limit.
    Jan 11 13:15:09 testhost kernel: device-mapper: multipath: Failing path 130:0.
    Jan 11 13:15:09 testhost multipathd: 130:0: mark as failed
    Jan 11 13:15:09 testhost multipathd: mpathag: remaining active paths: 3
    Jan 11 13:15:09 testhost kernel: blk_cloned_rq_check_limits: over max size limit.
    Jan 11 13:15:09 testhost kernel: device-mapper: multipath: Failing path 129:160.
    Jan 11 13:15:09 testhost multipathd: 129:160: mark as failed
    Jan 11 13:15:09 testhost multipathd: mpathy: remaining active paths: 3
    Jan 11 13:15:09 testhost kernel: blk_cloned_rq_check_limits: over max size limit.
    

    [...]

  • We have already configured 4096 max_sectors_kb value in /etc/multipath.conf file, added a udev rule as well to tune the max_sectors_kb value as shown in "How to set custom 'max_sectors_kb' option for devices under multipathd control?" but still the same issue persists.

Environment

  • Red Hat Enterprise Linux 6.9

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