Domain Master Browser Role

While checking below server and few in the past, I noticed below error

Event Type: Warning

Event Source: BROWSER

Event Category: None

Event ID: 8021

Date: 1/22/2011

Time: 5:46:36 PM

User: N/A

Computer: Test-PC

Description:

The browser service was unable to retrieve a list of servers from the browser master \TEST-SRV1 on the network DeviceNetBT_Tcpip_{F8877567-0FC8-4DC8-A4CB-6955BDE345B7}.

Browser master: \TEST-SRV1

Network: DeviceNetBT_Tcpip_{F8877567-0FC8-4DC8-A4CB-6955BDE345B7}

This event may be caused by a temporary loss of network connectivity. If this message appears again, verify that the server is still connected to the network. The return code is in the Data text box.

 

Here is the explanation about the above error in this MSFT TechNet Article. Below is a quick excerpt:

Explanation

The master browser maintains the browse list and provides it to other computers when requested. This computer could not retrieve the browse list from the master browser four times consecutively.

Possible causes include:

  • Network outages,
  • Name resolution problems,
  • An overloaded master browser, or
  • A master browser that is unavailable because, for example, it is shut down or its network connectivity is lost.

This event usually indicates poor network health. For more information about browsing, see Appendix I: Windows 2000 Server Browser Service on the Microsoft Technet Web site.

 

User Action

If this event is logged more than several times per day, check network connectivity issues. Otherwise, no user action is required.

The article Description of the Microsoft Computer Browser Service, explains the whole process of how servers find their master browser server.

The browser service maintains a list of the domain name or workgroup name the computer is in, and the protocol being used for each computer on the network segment being served by the computer running the browser service. On each network segment, a master browser is elected from the group of computers located on the segment that are running the browser service.

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