Getting Error Messages when trying to start the node-agent or cluster on GlassFish cluster ?

While trying to start the Node-Agent, the following message is reported

SYNC001: Unable to communicate with Domain Administration Server. Skipping synchronization.|#]
NAGT0035:The NodeAgent failed to complete the intial synchronization with the DAS.
Please make sure the DAS is running and is accessible from the NodeAgents server|#]

or

When starting the GlassFish cluster instances, the following Message is reported

MQJMSRA_LB4001: start:Aborted:Unable to ping Broker within 60000 millis (startTimeOut)

Please verify your system's hosts file, e.g. on Solaris or Linux the /etc/hosts file, on Windows under \Windows\System32\drivers\etc\hosts, and modify the loopback IP Address entry as below

#Comment the line below
#127.0.0.1 hostname2 localhost
#Add/Modify the line as below
10.12.161.91 hostname2 localhost

Then verify complete network accessibility from either systems and ensure a firewall is not blocking the communication.

NOTE : If the problem(s) persist you may want to refer the GlassFish Troubleshooting Guide

--Satyajit Tripathi My Blog