Host hangs, why?

Question

linux

Rented server on fastvps. the server works somewhere around 15-18 hours and freezes, only reboot helps.
At this moment, even via ssh, it is not possible to connect.
vmkwarning.log

[[email protected]:/var/log] cat vmkwarning.log
0:00:00:00.000 cpu0:1)WARNING: Serial: 813: Serial port com2 failed during initialization.
0:00:00:00.000 cpu0:1)WARNING: Serial: 814: Serial port com2 will be disabled.
0:00:00:05.387 cpu0:32768)WARNING: IOAPIC: 748: pin 0 is not masked
0:00:00:05.428 cpu0:32768)WARNING: VMKAcpi: 783: No IPMI PNP id found
2017-09-14T19:17:05.076Z cpu0:33128)WARNING: LinuxSignal: 541: vmkdevmgr: ignored unexpected signal flags 0x2 (sig 17)
2017-09-14T19:17:05.807Z cpu7:33149)WARNING: VMK_PCI: 698: device 0000:00:14.0 failed to allocate 8 MSIX interrupts
2017-09-14T19:17:05.807Z cpu7:33149)WARNING: LinPCI: LinuxPCI_EnableMSIX:862: 0000:00:14.0: Interrupt allocation failed with Not supported
2017-09-14T19:17:07.178Z cpu1:33147)WARNING: LinScsiLLD: scsi_add_host:573: vmkAdapter (usb-storage) sgMaxEntries rounded to 255. Reported size was 65535
2017-09-14T19:17:07.424Z cpu0:33209)WARNING: ScsiScan: 1651: Failed to add path vmhba1:C0:T4:L0 : Not found
2017-09-14T19:17:07.485Z cpu4:33209)WARNING: ScsiScan: 1651: Failed to add path vmhba1:C0:T5:L0 : Not found
2017-09-14T19:17:09.250Z cpu6:33080)WARNING: NetDVS: 660: portAlias is NULL
2017-09-14T19:17:09.449Z cpu2:33251)WARNING: Tcpip: 927: Failed to unset the ip address (error = 49)
2017-09-14T19:17:09.474Z cpu6:33080)WARNING: NetPortset: 1793: vSwitch0: already exists
2017-09-14T19:17:09.474Z cpu6:33080)WARNING: Net: 2159: can't create portset: Already exists
2017-09-14T19:17:18.772Z cpu1:33402)WARNING: Supported VMs 128, Max VSAN VMs 400, SystemMemoryInGB 32
2017-09-14T19:17:18.772Z cpu1:33402)WARNING: MaxFileHandles: 3840, Prealloc 1, Prealloc limit: 32 GB, Host scaling 
2017-09-14T22:31:04.223Z cpu4:33474)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
  Expecting message of type INIT (0).
2017-09-16T09:33:24.139Z cpu0:32803)WARNING: IOMMUIntel: 2766:  DMAR Fault IOMMU Unit #0: R/W=R, Device 0000:00:02.0 Faulting addr = 0xdb345000 Fault Reason = 0xc -> Reserved fields set in PTE actively set for Read or Write.
2017-09-16T09:33:24.139Z cpu0:32803)WARNING: IOMMUIntel: 2823: IOMMU context entry dump for 0000:00:02.0 Ctx-Hi = 0x102 Ctx-Lo = 0x120d2a001
2017-09-16T09:33:24.139Z cpu2:32805)WARNING: IOMMU: 1765: IOMMU Fault detected for 0000:00:02.0 (unnamed/) IOaddr: 0xdb345000 Mask: 0xc Domain: 0x4301f470c5a0.
2017-09-16T14:42:26.570Z cpu0:33474)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  
2017-09-17T15:40:38.003Z cpu7:33474)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-09-17T16:57:54.445Z cpu7:33474)WARNING: Migrate: 322: Remote machine's migration version (0x5a) not supported.  Only ESX 2.1 and newer are supported.
2017-09-18T07:24:59.930Z cpu1:219498)WARNING: NetDVS: 660: portAlias is NULL
2017-09-18T12:42:19.938Z cpu7:33474)WARNING: Migrate: 322: Remote machine's migration version (0x5a) not supported.  Only ESX 2.1 and newer are supported.
2017-09-19T08:27:54.259Z cpu7:33474)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-09-20T03:34:06.979Z cpu7:33474)WARNING: Migrate: 322: Remote machine's migration version (0xe025) not supported.  Only ESX 2.1 and newer are supported.
2017-09-20T03:34:23.006Z cpu7:33474)WARNING: Migrate: 322: Remote machine's migration version (0xe025) not supported.  Only ESX 2.1 and newer are supported.
2017-09-20T07:40:33.022Z cpu7:32828)WARNING: SP: 1524: Smashing barrier dealloc-Barrier.
2017-09-20T07:41:16.805Z cpu3:328845)WARNING: NetDVS: 660: portAlias is NULL
2017-09-20T08:20:51.900Z cpu7:33474)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-09-20T08:20:52.406Z cpu7:33474)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-09-20T08:20:52.900Z cpu7:33474)WARNING: Migrate: 356: Invalid message type for new connection: 16817152.  Expecting message of type INIT (0).
2017-09-20T21:40:16.943Z cpu5:32796)WARNING: ScsiDeviceIO: 1243: Device naa.600605b00b4b7410ff015fdef936a721 performance has deteriorated. I/O latency increased from average value of 773 microseconds to 168688 microseconds.
2017-09-21T12:43:01.977Z cpu6:395630)WARNING: NetDVS: 660: portAlias is NULL
2017-09-21T12:43:20.857Z cpu7:32826)WARNING: SP: 1524: Smashing barrier dealloc-Barrier.
2017-09-21T12:43:20.956Z cpu4:395684)WARNING: NetDVS: 660: portAlias is NULL
2017-09-21T21:34:19.167Z cpu7:33474)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-09-21T21:34:19.663Z cpu7:33474)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-09-21T21:34:20.158Z cpu7:33474)WARNING: Migrate: 356: Invalid message type for new connection: 16817152.  Expecting message of type INIT (0).
2017-09-22T08:18:12.124Z cpu3:32828)WARNING: SP: 1524: Smashing barrier dealloc-Barrier.
2017-09-22T08:18:44.357Z cpu6:445019)WARNING: NetDVS: 660: portAlias is NULL
2017-09-28T13:28:38.158Z cpu0:33249)WARNING: Tcpip: 927: Failed to unset the ip address (error = 49)
2017-09-28T13:28:46.621Z cpu3:33392)WARNING: Supported VMs 128, Max VSAN VMs 400, SystemMemoryInGB 32
2017-09-28T13:28:46.621Z cpu3:33392)WARNING: MaxFileHandles: 3840, Prealloc 1, Prealloc limit: 32 GB, Host scaling 
2017-09-28T13:30:18.418Z cpu6:35304)WARNING: NetDVS: 660: portAlias is NULL
2017-09-29T16:44:16.983Z cpu2:33464)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-09-29T16:44:17.468Z cpu2:33464)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-09-29T16:44:17.993Z cpu2:33464)WARNING: Migrate: 356: Invalid message type for new connection: 16817152.  Expecting message of type INIT (0).
2017-09-30T08:45:29.995Z cpu5:33464)WARNING: Migrate: 356: Invalid message type for new connection: 542393671.  Expecting message of type INIT (0).
2017-10-01T03:29:14.336Z cpu5:33464)WARNING: Migrate: 322: Remote machine's migration version (0xe025) not supported.  Only ESX 2.1 and newer are supported.
2017-10-01T03:29:35.357Z cpu0:33464)WARNING: Migrate: 322: Remote machine's migration version (0xe025) not supported.  Only ESX 2.1 and newer are supported.
2017-10-01T06:13:56.416Z cpu0:33464)WARNING: Migrate: 322: Remote machine's migration version (0xe025) not supported.  Only ESX 2.1 and newer are supported.
2017-10-01T06:14:17.133Z cpu2:33464)WARNING: Migrate: 322: Remote machine's migration version (0xe025) not supported.  Only ESX 2.1 and newer are supported.
0:00:00:00.000 cpu0:1)WARNING: Serial: 813: Serial port com2 failed during initialization.
0:00:00:00.000 cpu0:1)WARNING: Serial: 814: Serial port com2 will be disabled.
0:00:00:05.387 cpu0:32768)WARNING: IOAPIC: 748: pin 0 is not masked
0:00:00:05.429 cpu0:32768)WARNING: VMKAcpi: 783: No IPMI PNP id found
2017-10-01T07:04:58.405Z cpu2:33127)WARNING: LinuxSignal: 541: vmkdevmgr: ignored unexpected signal flags 0x2 (sig 17)
2017-10-01T07:04:59.089Z cpu1:33148)WARNING: VMK_PCI: 698: device 0000:00:14.0 failed to allocate 8 MSIX interrupts
2017-10-01T07:04:59.089Z cpu1:33148)WARNING: LinPCI: LinuxPCI_EnableMSIX:862: 0000:00:14.0: Interrupt allocation failed with Not supported
2017-10-01T07:05:00.153Z cpu0:33207)WARNING: ScsiScan: 1651: Failed to add path vmhba1:C0:T4:L0 : Not found
2017-10-01T07:05:00.194Z cpu1:33207)WARNING: ScsiScan: 1651: Failed to add path vmhba1:C0:T5:L0 : Not found
2017-10-01T07:05:01.957Z cpu2:33079)WARNING: NetDVS: 660: portAlias is NULL
2017-10-01T07:05:02.210Z cpu0:33249)WARNING: Tcpip: 927: Failed to unset the ip address (error = 49)
2017-10-01T07:05:10.751Z cpu0:33394)WARNING: Supported VMs 128, Max VSAN VMs 400, SystemMemoryInGB 32
2017-10-01T07:05:10.751Z cpu0:33394)WARNING: MaxFileHandles: 3840, Prealloc 1, Prealloc limit: 32 GB, Host scaling factor: 1
2017-10-01T07:05:10.751Z cpu0:33394)WARNING: DOM memory will be preallocated.
2017-10-01T07:05:11.105Z cpu2:33435)WARNING: APEI: 247: Could not initialize HEST
2017-10-01T07:05:11.211Z cpu7:33457)WARNING: FTCpt: 476: Using IPv6 address to start server listener
2017-10-01T07:05:12.824Z cpu0:33669)WARNING: ScsiScan: 1651: Failed to add path vmhba1:C0:T4:L0 : Not found
2017-10-01T07:05:12.865Z cpu0:33669)WARNING: ScsiScan: 1651: Failed to add path vmhba1:C0:T5:L0 : Not found
2017-10-01T07:05:24.883Z cpu6:35246)WARNING: NetDVS: 660: portAlias is NULL
2017-10-01T07:06:19.154Z cpu7:35306)WARNING: NetDVS: 660: portAlias is NULL
0:00:00:00.000 cpu0:1)WARNING: Serial: 813: Serial port com2 failed during initialization.
0:00:00:00.000 cpu0:1)WARNING: Serial: 814: Serial port com2 will be disabled.
0:00:00:05.388 cpu0:32768)WARNING: IOAPIC: 748: pin 0 is not masked
0:00:00:05.429 cpu0:32768)WARNING: VMKAcpi: 783: No IPMI PNP id found
2017-10-01T12:17:38.403Z cpu4:33127)WARNING: LinuxSignal: 541: vmkdevmgr: ignored unexpected signal flags 0x2 (sig 17)

Answer 1

What does tech support say?

Answer 2

Immediately suggestive is the line that it cannot add disks and cannot create vSwicth0