The server is unavailable and could not be accessed

Question

Hello,
Our SharePoint Search stopped working on the weekend, and I still could not figure out the problem. I checked Event Viewer, and ULS Logs, they are all pointing to network issue. However, I can ping the web servers from application servers.
It does not navigate to SharePoint site though. I'm not sure what would be the problem. I read that it could be Kerberos, but it was working without any problems for a long time.
Can anyone help me please?
Context: Application 'Search_Service_Application_1', Catalog 'Portal_Content'
Details:
    The server is unavailable and could not be accessed. The server is probably disconnected from the network.   (0x80040d32)
The server xxxx is unavailable and could not be accessed. The server is probably disconnected from the network. Items from this server will be skipped by the crawl for the next 10 minutes
Thanks

Answer 1

Hi Danny:
I provide you three method for you, maybe you can try it.
Method 1 (recommended): Create the Local Security Authority host names that can be referenced in an NTLM authentication request.
To do this, follow these steps for all the nodes on the client   computer:     
Click Start, click Run, type regedit, and then click
OK.
Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0
Right-click MSV1_0, point to New, and then click
Multi-String Value.
In the Name column, type BackConnectionHostNames, and then press ENTER.
Right-click BackConnectionHostNames, and then click
Modify.
In the Value data box, type the CNAME or the DNS alias, that is used for the local shares on the computer, and then click
OK.
Exit Registry Editor, and then restart the computer.
Note Type each host name on a separate line.
Note If the BackConnectionHostNames registry entry exists as a REG_DWORD type, you have to delete the BackConnectionHostNames registry entry.
Method 2: Disable the authentication loopback check
Re-enable the behavior that exists in Windows Server 2003 by   setting the DisableLoopbackCheck registry entry in the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa   registry subkey to 1. To set the DisableLoopbackCheck registry   entry
to 1, follow these steps on the client computer:   
Click Start, click Run, type regedit, and then click
OK.
Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
Right-click Lsa, point to New, and then click
DWORD Value.
Type DisableLoopbackCheck, and then press ENTER.
Right-click DisableLoopbackCheck, and then click Modify.
In the Value data box, type 1, and then click
OK.
Exit Registry Editor.
Restart the computer.
Method 3: Check the hosts file
Remove sharepoint search server record.