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jos_hua's avatar
jos_hua
Level 3
5 years ago

VM backup failing with status 23 and status 6

I had encountered the below error for nbu v8.1.2

23 Oct, 2019 2:27:46 PM - begin writing
23 Oct, 2019 2:27:46 PM - Info bptm (pid=980) start
23 Oct, 2019 2:28:01 PM - Error bpbrm (pid=4804) from client WINSERVER01: ERR - Error opening the snapshot disks using given transport mode: nbd:nbdssl:san:hotadd Status 23
23 Oct, 2019 2:28:02 PM - Error bptm (pid=980) socket operation failed - 10054 (at ../child.c.1287)
23 Oct, 2019 2:28:02 PM - Error bptm (pid=980) unable to perform read from client socket, connection may have been broken
23 Oct, 2019 2:28:07 PM - Info mediaserver.intranet.abc.net.it (pid=5076) StorageServer=PureDisk:mediaserver.intranet.abc.net.it; Report=PDDO Stats (multi-threaded stream used) for (mediaserver.intranet.abc.net.it): scanned: 3 KB, CR sent: 0 KB, CR sent over FC: 0 KB, dedup: 100.0%, cache disabled
23 Oct, 2019 2:28:08 PM - Error bpbrm (pid=4804) could not send server status message to client
23 Oct, 2019 2:28:10 PM - Critical bpbrm (pid=4804) unexpected termination of client WINSERVER01
23 Oct, 2019 2:28:10 PM - Info bpbkar32 (pid=0) done. status: 6: the backup failed to back up the requested files
23 Oct, 2019 2:28:10 PM - end writing; write time: 0:00:24
User backup failed (6)

i had checked firewall rules had already opened the 

  • tcp 443 & 902 for nbu master/media & vmware vcenter (able to telnet vcenter 445)
  • tcp 1556 & 13724 for nbu master/media (able to telnet master/media 1556/13724)

I had searched the knowledgebase and tried the technotes.

Please advise of any steps to resolve this issue?

Regards
Joshua

8.1.2
Windows Server 2016

16 Replies

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  • RiaanBadenhorst's avatar
    RiaanBadenhorst
    Level 6
    5 years ago

    Communication on port 902 is with the ESX hosts, not the vCenter. Please check the media server (backup host) can connect to the ESX hosts on 902.

    Is this new or existing install? in otherwords, has it worked and stopped, or never worked?

    • jos_hua's avatar
      jos_hua
      Level 3
      5 years ago

      I had re-checked and confirm that i can telnet from media server to ESX host port 902.

      This is an existing installation and it working and stopped recently.

      BR

  • jos_hua's avatar
    jos_hua
    Level 3
    5 years ago

    Thank you everyone for your helpful contributions!

    Finally resolved the problem after revisiting this KB article again.

    VMWare backup error: Error opening the snapshot disks using given transport mode: Status 23

    https://www.veritas.com/content/support/en_US/article.100010011

    Rechecked my HOSTS file to verify the entries of hostnames and ip addresses of each ESX hosts carefully and spotted an ip address of a ESX server was matched to the hostname of another ESX server.

    This silly typo mistake caused the NBU backup process to erroneously tried to access the snapshot files from the wrong ESX server's datastore.

    After amending the HOSTS file with correct matching ip address & hostname of ESX host, i could successfully backup my VMware VMs again.

    BR

    • Hamza_H's avatar
      Hamza_H
      Moderator
      5 years ago

      Great news !

      Glad you found the resolution, typo mistakes are the worst.. sometimes you think you configured it as it should be, but actually you didn't and at this point you get crazy and suspicious about what you learned.. (lol)..

      Have a good day :)!

      BR;

  • Hamza_H's avatar
    Hamza_H
    Moderator
    5 years ago

    Hello,

    In general, this issue occurs is when the selected transport is not configured:

    ERR - Error opening the snapshot disks using given transport mode: nbd:nbdssl:san:hotadd Status 23.

    Please post vxms logs from your VM backup host (verbo=3) should be enough,

     

    BR

     

  • Hamza_H's avatar
    Hamza_H
    Moderator
    5 years ago

    Also, you mentionned : 

    i had checked firewall rules had already opened the 

    • tcp 443 & 902 for nbu master/media & vmware vcenter (able to telnet vcenter 445)

    have you checked the telnet between the Vmbackup host and the vcenter over the port 902 in biderectionnel? not only the 443 port.

    • Hamza_H's avatar
      Hamza_H
      Moderator
      5 years ago

      and if you are able to telnet the ports, what is the ESX version? maybe you should look at this :

       

      https://www.veritas.com/support/en_US/article.100014849

      Snip :

      "VMware backup failed display status code 23 and 6 by NBD method.

      telnet to port 902 and 443 from backup host was working fine.
      VxMS logs shows error CnxAuthdConnect: Returning false because CnxAuthdProtoReadResponse2 failed

      Vcenter is not able to establish NFC connection to ESX server at port 902 as Connection is terminated by ESX server.

       
      ESX 5.5 was installed on HP ProLiant BL460c Server Blade
      This issue occurs with ESXi hosts running on HP hardware with below versions of AMS(Agentless Management Service):
      • hp-ams 500.9.6.0-12.434156
      • hp-ams-550.9.6.0-12.1198610
      • hp-ams 500.10.0.0-18.434156
      • hp-ams-550.10.0.0-18.1198610
       
      This is a known issue affecting ESXi 5.x.
      To resolve the issue, upgrade to AMS version 10.0.1.
       
      For more information, please access these external links:
      HP Agentless Management Service Offline Bundle for VMware vSphere 5.5
       
      ESXi host cannot initiate vMotion or enable services and reports the error: Heap globalCartel-1 already at its maximum size.Cannot expand (2085618)
       
      • jos_hua's avatar
        jos_hua
        Level 3
        5 years ago

        My ESX vmware v6.5 on Dell servers.

        guessing the technote may not applicable to my environment.

        BR

    • jos_hua's avatar
      jos_hua
      Level 3
      5 years ago
      • tcp 443 for nbu master/media & vmware vcenter (able to telnet vcenter 443)
      • tcp 902 Vmbackup host and the vcente (able to telnet 902)

      the firewall rules are bi-directional.

      BR