Grid : DefaultRemoteProxy unknown version,server response code : 500

I am using Appium for mobile automation.

I have started hub and node with below command.

hub

java -jar jarname -role hub -port 4723

node

node appium -a hubipaddress -nodconfig node.json -u udid

I am able to launch hab and node.But at the time of execution i am getting below error on the hub “DefaultRemoteProxy unknown version,server response code : 500”