Log messages

i am seeing this messgae swith Qlogic as well as Emulex HBA while running IO with NETAPP filers.
i am seeing some significant IO delay at the time when it displays these messages.

i am running test with RHEL7.3 SnapShot2/SnapShot3.

Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 13/11> sid: x20600 did: x50e0a oxid: xffff Data: xb x17a3 x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 7/0> sid: x20600 did: x50e0c oxid: xffff Data: x17 x18be x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 16/1> sid: x20600 did: x50e09 oxid: xffff Data: x9 xa2d x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.1: 1:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 14/39> sid: x20700 did: x60107 oxid: xffff Data: x11 x1507 x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.1: 1:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 17/0> sid: x20700 did: x50f0a oxid: xffff Data: xa x1188 x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.1: 1:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 17/10> sid: x20700 did: x50f0a oxid: xffff Data: xa xf5a x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 16/0> sid: x20600 did: x50e09 oxid: xffff Data: x9 x1792 x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 7/12> sid: x20600 did: x50e0c oxid: xffff Data: x17 x1389 x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 16/10> sid: x20600 did: x50e09 oxid: xffff Data: x9 x8e8 x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 17/38> sid: x20600 did: x50905 oxid: xffff Data: x13 x993 x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 7/11> sid: x20600 did: x50e0c oxid: xffff Data: x17 xdb9 x0 x1e
Sep 20 04:30:24 ibmx3550-229-141 kernel: lpfc 0000:1a:00.0: 0:(0):3376 FCP could not issue IOCB err 1FCP cmd x2a 9/39> sid: x20600 did: x50907 oxid: xffff Data: x11 x1082 x0 x1e

can some one explain me what these messages mean?
does it have any thing to do with IO delay?