WebSocket close code
WebSocket close code: 1009 Message Too Big
As text you can copy
1009 Message Too Big- Kind
- Close code
- Where you meet it
- When a WebSocket connection closes
What does 1009 Message Too Big mean in WebSocket?
An endpoint is ending the connection because it received a message that is too big for it to process.
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What it means in trading API work
Either you sent one very large message, for example a subscription to a great many instruments at once, or your own library closed the connection because an incoming message was larger than it allows.
This part is this site's own explanation, written for people learning to call a trading API. It is not part of the source cited above and it describes no particular broker.
What should I do about 1009 Message Too Big?
Split large subscriptions into smaller messages. If your own library sent the close, raise its maximum message size.
This page is an independent explanation in plain words. The definition itself is in the source it was read from, which is the authority if the two ever differ.