I created a tor relay set up using a raspberry pi called Goblin500, it has now been up for a while and i have the fast, valid, running and v2dir flag

i have been working on some code that can be found at: https://github.com/richarddennis/Masters-Project to connect to various nodes in tor and create a stream, i am able to connect no problem to various nodes such as TorLand1, orion etc no problem, however when i try to create a circuit containing Goblin500, there is a significant delay and when i do receive anything it is only get a destroy cell containing the error code 8 - OR_CONN_CLOSED 

the node is in the consensus :

what is causing the error and more importantly how can it be solved 

there are no errors in the/var/log/tor/notices.log file