can not connect to phoenix with python phoenixdb

Question

I'm trying to connect to phoenix using python plugin 'phoenixdb'.

I'm connecting from a server on the same network with phoenix machine.

Here is the code I am using

import phoenixdb
import phoenixdb.cursor
database_url = 'http://datanode4:2181'
try:
    conn = phoenixdb.connect(database_url, autocommit=True,user='',password='')
    cursor = conn.cursor()
    cursor.execute("SELECT * FROM TESTTABLE")
except Exception as e:
    print(e)
finally:
    conn.close()

I get the following error

phoenixdb.errors.InterfaceError: ('RPC request failed', None, None, RemoteDisconnected('Remote end closed connection without response'))

Even when I try to use curl, I get 'Empty reply from server'

Can you guys help me?