Error message "JoinserviceTask failed with exception. System.Net.Sockets.SocketException (0x80004005): No such host is known" in RSA DLP
Originally Published: 2016-01-15
Last Modified: 2023-10-06
Article Number
000049841
Applies To
RSA Product Set: Data Loss Prevention (DLP)
RSA Product/Service Type: Enterprise Manager
RSA Version/Condition: 9.6 SP2
Platform: Linux
 
Issue
Installed a new Endpoint coordinator.
The services are running in new EPC but it is not showing live in the console. The status shows "Pending connection to EPC"
Cause
EPC cannot resolve the rEPC name to get the certificate 
2016-01-14 20:45:50,109 [JoinServiceThread - 8] ERROR EndpointCoordinator.Security.JoinServiceTask - Failed to get the certificate from root epc.
2016-01-14 20:46:15,109 [JoinServiceThread - 8] ERROR EndpointCoordinator.Security.JoinServiceTask - Failed to get the certificate from root epc.
2016-01-14 20:46:40,109 [JoinServiceThread - 8] ERROR EndpointCoordinator.Security.JoinServiceTask - JoinserviceTask failed with exception.
System.Net.Sockets.SocketException (0x80004005): No such host is known

 
Resolution
1.  Open the hosts file located in the directory below. 
C:\Windows\System32\drivers\etc

2.  Add an entry for the rEPC hostname
  
example 
#	127.0.0.1       localhost
#	::1             localhost

10.10.10.10 repc.example.com

3.  Save the file

The above method is used if there is no way the EM can resolve the FQDN of the Root EPC.
Make a note so that if the IP address gets changed, you will need to update the host file

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