No handlers could be found for logger "websocket"

[AshishBaboo]

2018-04-05 18:56:10,407 - INFO - ws_thread - Connecting to wss://testnet.bitmex.com/realtime?subscribe=quote:XBTUSD,trade:XBTUSD,orderBook25:XBTUSD,instrument,order:XBTUSD,execution:XBTUSD,margin,position
2018-04-05 18:56:10,407 - INFO - ws_thread - Authenticating with API Key.
2018-04-05 18:56:10,408 - INFO - ws_thread - Started thread
2018-04-05 18:56:13,503 - INFO - ws_thread - Connected to WS. Waiting for data images, this may take a moment...
2018-04-05 18:56:13,505 - ERROR - ws_thread - Unknown table: orderBook25
No handlers could be found for logger "websocket"

[adacumos]

orderBook25 has been deprecated as stated here https://blog.bitmex.com/site_announcement/notice-of-pending-orderbook-deprecation/ code needs to be updated to use orderBookL2_25 instead of orderbook25.