I've deployed, deleted, redeployed the same vm several times. Last night when I tried again it worked. Today I tried, and it failed.
The GUI shows that the upload disk task succeeded, and the Import VApp "failed - operation timed out"
I see hundreds of lines like these in the vmkernel.log
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2018-12-06T18:22:20.242Z cpu12:67681)BC: 3576: Pool 0: Blocking due to no free buffers. nDirty = 594 nWaiters = 1
2018-12-06T18:24:00.182Z cpu8:65577)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x12 (0x439d00734180, 0) to dev "naa.600508e0000000008a77d90fc40a6808" on path "vmhba2:C1:T2:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:24:00.182Z cpu8:65577)ScsiDeviceIO: 2968: Cmd(0x439d00734180) 0x12, CmdSN 0x17b080 from world 0 to dev "naa.600508e0000000008a77d90fc40a6808" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
2018-12-06T18:29:00.181Z cpu8:66033)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x12 (0x439d006d7c80, 0) to dev "naa.600508e0000000008a77d90fc40a6808" on path "vmhba2:C1:T2:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:29:00.181Z cpu8:66033)ScsiDeviceIO: 2968: Cmd(0x439d006d7c80) 0x12, CmdSN 0x17b0c7 from world 0 to dev "naa.600508e0000000008a77d90fc40a6808" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
2018-12-06T18:34:00.181Z cpu12:65727)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x12 (0x439d04ad4380, 0) to dev "naa.600508e0000000008a77d90fc40a6808" on path "vmhba2:C1:T2:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:34:00.181Z cpu12:65727)ScsiDeviceIO: 2968: Cmd(0x439d04ad4380) 0x12, CmdSN 0x17b0db from world 0 to dev "naa.600508e0000000008a77d90fc40a6808" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
2018-12-06T18:34:01.098Z cpu14:65583)ScsiDeviceIO: 2954: Cmd(0x439d04ad4380) 0x1a, CmdSN 0x17b0de from world 0 to dev "mpx.vmhba40:C0:T0:L1" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x24 0x0.
2018-12-06T18:34:01.386Z cpu10:65579)ScsiDeviceIO: 2954: Cmd(0x439d04ad4380) 0x1a, CmdSN 0x17b0df from world 0 to dev "mpx.vmhba40:C0:T0:L2" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x24 0x0.
2018-12-06T18:37:10.258Z cpu2:67644)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x1a (0x439500ae6ac0, 67532) to dev "naa.600508e000000000d977296bf50a580d" on path "vmhba2:C1:T3:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:37:10.258Z cpu2:67644)ScsiDeviceIO: 2968: Cmd(0x439500ae6ac0) 0x1a, CmdSN 0x1f108 from world 67532 to dev "naa.600508e000000000d977296bf50a580d" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
2018-12-06T18:37:10.270Z cpu2:67644)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x1a (0x439500ae6ac0, 67532) to dev "naa.600508e0000000008a77d90fc40a6808" on path "vmhba2:C1:T2:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:37:10.270Z cpu2:67644)ScsiDeviceIO: 2968: Cmd(0x439500ae6ac0) 0x1a, CmdSN 0x1f10c from world 67532 to dev "naa.600508e0000000008a77d90fc40a6808" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
2018-12-06T18:38:00.179Z cpu9:66102)NMP: nmp_ResetDeviceLogThrottling:3439: Error status H:0x0 D:0x2 P:0x0 Sense Data: 0x5 0x24 0x0 from dev "mpx.vmhba40:C0:T0:L2" occurred 1 times(of 1 commands)
2018-12-06T18:38:00.179Z cpu9:66102)NMP: nmp_ResetDeviceLogThrottling:3439: Error status H:0x0 D:0x2 P:0x0 Sense Data: 0x5 0x24 0x0 from dev "mpx.vmhba40:C0:T0:L1" occurred 1 times(of 1 commands)
2018-12-06T18:39:00.181Z cpu11:1812430)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x12 (0x439d006b1480, 0) to dev "naa.600508e0000000008a77d90fc40a6808" on path "vmhba2:C1:T2:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:39:00.181Z cpu11:1812430)ScsiDeviceIO: 2968: Cmd(0x439d006b1480) 0x12, CmdSN 0x17b113 from world 0 to dev "naa.600508e0000000008a77d90fc40a6808" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
2018-12-06T18:39:00.903Z cpu11:65580)ScsiDeviceIO: 2954: Cmd(0x439d006b1480) 0x1a, CmdSN 0x17b115 from world 0 to dev "mpx.vmhba40:C0:T0:L0" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x24 0x0.
2018-12-06T18:44:00.181Z cpu12:65616)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x12 (0x439d007b8a80, 0) to dev "naa.600508e0000000008a77d90fc40a6808" on path "vmhba2:C1:T2:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:44:00.181Z cpu12:65616)ScsiDeviceIO: 2968: Cmd(0x439d007b8a80) 0x12, CmdSN 0x17b127 from world 0 to dev "naa.600508e0000000008a77d90fc40a6808" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
2018-12-06T18:49:00.182Z cpu13:66041)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x12 (0x439d04ba7880, 0) to dev "naa.600508e0000000008a77d90fc40a6808" on path "vmhba2:C1:T2:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:49:00.182Z cpu13:66041)ScsiDeviceIO: 2968: Cmd(0x439d04ba7880) 0x12, CmdSN 0x17b13b from world 0 to dev "naa.600508e0000000008a77d90fc40a6808" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
2018-12-06T18:54:00.183Z cpu8:65577)NMP: nmp_ThrottleLogForDevice:3647: Cmd 0x12 (0x439d00725000, 0) to dev "naa.600508e0000000008a77d90fc40a6808" on path "vmhba2:C1:T2:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0. Act:NONE
2018-12-06T18:54:00.183Z cpu8:65577)ScsiDeviceIO: 2968: Cmd(0x439d00725000) 0x12, CmdSN 0x17b14f from world 0 to dev "naa.600508e0000000008a77d90fc40a6808" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x0 0x0.
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