All hosts are disconnected from vCenter Server after changing the DNS server

Products

• VMware vCenter Server

Issue/Introduction

Symptoms:

• All the hosts appear as Disconnected/Not responding in vCenter Server after changing/removing the DNS Server
• You are able to connect to the host directly using the vSphere Client or SSH
• Running the NSlookup host name command reports the unknown server error and points to the old DNS Server IP address
• In the vpxd.log file, you see entries similar to:

2012-06-29T02:28:11.182-07:00 [01072 info 'Default' opID=HB-host-9@5841-b9f5298] [VpxdHostSync] Synchronizing host: Host Name (Host Name, IP Address)

2012-06-29T02:28:11.182-07:00 [02896 error 'HttpConnectionPool'] [ConnectComplete] Connect error The requested name is valid, but no data of the requested type was found.

2012-06-29T02:28:11.182-07:00 [01072 error 'Default' opID=HB-host-9@5841-b9f5298] [VpxdClientAdapter] Got vmacore exception: The requested name is valid, but no data of the requested type was found.

2012-06-29T02:28:11.182-07:00 [01072 error 'Default' opID=HB-host-9@5841-b9f5298] [VpxdClientAdapter] Backtrace:

--> backtrace[00] rip 000000018013deba (no symbol)

--> backtrace[01] rip 0000000180101518 (no symbol)

--> backtrace[02] rip 0000000180101a5e (no symbol)

--> backtrace[03] rip 000000018008930b (no symbol)

--> backtrace[04] rip 000000018013d366 (no symbol)

--> backtrace[05] rip 0000000180160ba5 (no symbol)

--> backtrace[06] rip 000000018021c803 (no symbol)

--> backtrace[07] rip 000000018021c3dc (no symbol)

--> backtrace[08] rip 00000001801541a8 (no symbol)

--> backtrace[09] rip 00000001801549d6 (no symbol)

--> backtrace[10] rip 0000000180154eed (no symbol)

--> backtrace[11] rip 0000000180155c70 (no symbol)

--> backtrace[12] rip 000000018014e575 (no symbol)

--> backtrace[13] rip 0000000073e02fdf (no symbol)

--> backtrace[14] rip 0000000073e03080 (no symbol)

--> backtrace[15] rip 000000007753652d (no symbol)

--> backtrace[16] rip 00000000779cc521 (no symbol)

Environment

VMware vCenter Server 4.1.x
VMware vCenter Server 5.0.x

Cause

This issue occurs if:

• The DNS Server IP address is changed, but vCenter Server is pointing to the old DNS Server IP address in the TCP/IP settings
• TCP/IP setting are configured with the incorrect IP address

Resolution

To resolve this issue, update the TCP/IP settings with the new/correct DNS Server IP.

To update the TCP/IP settings with the new/correct DNS Server IP in Windows 2008 and Windows 2008 R2:

1. Go to Control Panel.
2. Select Network and Sharing Center. If you are not able to see this option, click View by > Small icon.
3. Click Change adapter setting/Manage network connection.
4. Right-click Network Adapter and click Properties.
5. Select the Internet Protocol version 4 (TCP/IPv4) option.
6. Click Properties.
7. Update the DNS server IP address with the correct IP address.
8. Click OK.
9. Reconnect the host in vCenter Server.