sending messages to already created websocket objects

I have a list of websocket server objects that get created when client(s) call in on port A.

Another port, B listens for incoming http requests(no websockets here) on same server. The requirement is to send messages to websocket clients via already created websockets connections (on port A) based on requests on port B.

My initial hunch was just to test the created websocket object in different request contexts.
To start with, I saved the websocket server object in a global table variable. Requests on port B seem to have access to earlier saved websocket object. Tried sending text using this object through it resulted in error:

lua entry thread aborted: runtime error: ...r/openresty/1.13.6.1/lualib/resty/websocket/protocol.lua:320: bad request
stack traceback:
coroutine 0:
	[C]: in function 'send'
	...r/openresty/1.13.6.1/lualib/resty/websocket/protocol.lua:320: in function '_send_frame'
	...lar/openresty/1.13.6.1/lualib/resty/websocket/server.lua:167: in function 'send_text'``

Any insights? I was going to try the ngx.shared.DICT next but wanted to check with you all. I am new to openresty and Lua

Start with the reported send_text failure in resty/websocket/server.lua and the bad request traceback from resty/websocket/protocol.lua. Read how the websocket object is used across requests on ports A and B, including the proposed ngx.shared.DICT approach. The issue does not define a concrete fix or completion test.