xujiesh0510 opened a new issue #4234:
URL: https://github.com/apache/apisix/issues/4234
### Issue description
### Environment
* apisix version (cmd: `apisix version`):
apisix websocket 一层代理 可以正常工作。
当apisix 前面 放了nginx 时候，两层代理， 请求能够打到 应用，但是几秒内就报
[2021-05-13T02:42:10.903Z] Error: Connection disconnected with error 'Error:
WebSocket closed with status code: 1006 ().'.
应用端报错：
System.Net.WebSockets.WebSocketException (0x80004005): The remote party
closed the WebSocket connection without completing the close handshake.
---> System.Net.WebSockets.WebSocketException (0x80004005): The remote
party closed the WebSocket connection without completing the close handshake.
怎么解决呢？
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