Back-up van Avamar VM-image mislukt met foutmelding: "NBD_ERR_NETWORK_CONNECT"

Summary: VM-back-up mislukt met foutmelding:"Kan 'vpxa-nfcssl://[] /.Vmdk@:902' met vlaggen 0x1e NBD_ERR_NETWORK_CONNECT (2338)"

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Symptoms



  • VM-back-ups mislukken met de volgende fout: 
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:DISKLIB-LIB   : Failed to open 'vpxa-nfcssl://[<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk@<esx_name>.com:902' with flags 0x1e NBD_ERR_NETWORK_CONNECT (2338). 
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:NBD_ClientOpen: attempting to create connection to vpxa-nfc://[<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk@<esx_name>:902
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:CnxAuthdConnect: Returning false because CnxAuthdConnectTCP failed 2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:CnxConnectAuthd: Returning false because CnxAuthdConnect failed
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:Cnx_Connect: Returning false because CnxConnectAuthd failed
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:Cnx_Connect: Error message: Host address lookup for server esx-dc-ams003.avg.com failed: Name or service not known 2015-11-18 09:44:15 avvcbimage Warning <16041>: VDDK:[NFC ERROR] NfcNewAuthdConnectionEx: Failed to connect to peer. Error: Host address lookup for server esx-dc-ams003.avg.com failed: Name or service not known
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:NBD_ClientOpen: Couldn't connect to esx-dc-ams003.avg.com:902 Host address lookup for server esx-dc-ams003.avg.com failed: Name or service not known
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:DISKLIB-DSCPTR: : "vpxa-nfc://[<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk@<esx_name>:902" : Failed to open NBD extent.
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:DISKLIB-LINK  : "vpxa-nfc://[<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk@<esx_name>:902" : failed to open (NBD_ERR_NETWORK_CONNECT). 
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:DISKLIB-CHAIN : "vpxa-nfc://[<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk@<esx_name>:902" : failed to open (NBD_ERR_NETWORK_CONNECT).
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:DISKLIB-LIB   : Failed to open 'vpxa-nfc://[<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk@<esx_name>:902' with flags 0x1e NBD_ERR_NETWORK_CONNECT (2338).
2015-11-18 09:44:15 avvcbimage Error <0000>: [IMG0008] Failed to connect to virtual disk [<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk (13) (13) You do not have access rights to this file
2015-11-18 09:44:15 avvcbimage Info <19644>: Connecting virtual disk [san_storage_dc_ams_00_web] <VM_Name>/<VM_Name>.vmdk
2015-11-18 09:44:15 avvcbimage Error <0000>: [IMG0008] VixDiskLib_Open([<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk) returned (13) You do not have access rights to this file
2015-11-18 09:44:15 avvcbimage Info <9772>: Starting graceful (staged) termination, VixDiskLib_Open attempt to connect to virtual disk failed (wrap-up stage)
2015-11-18 09:44:15 avvcbimage Info <16052>: Terminating backup of all remaining virtual disks

 

Cause

  • De proxy is verbonden met esx op poort 902, maar probeert meer dan één keer verbinding te maken met de VM-schijf, maar dit mislukt vanwege een netwerkprobleem (d.w.z. pakketdaling) met de volgende fout:    
2015-11-18 09:44:15 avvcbimage Info <16041>: VDDK:DISKLIB-LIB   : Failed to open 'vpxa-nfc://[<Datastore_Name>] <VM_Name>/<VM_Name>.vmdk@<esx_Name>:902' with flags 0x1e NBD_ERR_NETWORK_CONNECT (2338).

 

Resolution

Tijdelijke oplossing:
  1. Host-VMotion: de virtuele machine waarvan geen back-up kon worden gemaakt (hierboven bekend als 'VM_Name') op een andere ESX-server.
  2. Maak een on-demand back-up van de gemigreerde virtuele machine.
  3. Zodra de transactie is voltooid, moet de klant zijn netwerkteam inschakelen om te controleren waarom er pakketten wegvallen tussen de proxy (hierboven aangeduid als "Proxy_Name") en de ESX (aangeduid met "esx_name").

Alternatieve tijdelijke oplossing:

Controleer de record van de ESX-server in DNS om te zien of de proxy die wordt gebruikt voor deze groepsback-up deze ESX-host kan oplossen met hetzelfde record.  

Om dit te doen:
  1. Open een putty naar de proxy die wordt gebruikt voor de back-up (d.w.z. Proxy_Name).
  2. Voer de opdracht nslookup <esx_FQN> uit.
  3. Als het resultaat negatief is, vraagt u de klant om het esx-record op de DNS te wijzigen of elk proxy /etc/hosts-bestand toe te voegen met het juiste esx-, FQN en IP-adres.

 

Additional Information

Avamar versie: 7.1.1.145

Affected Products

Avamar

Products

Avamar, Avamar Client for VMware
Article Properties
Article Number: 000064048
Article Type: Solution
Last Modified: 07 Nov 2025
Version:  3
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