Getting the error “Sampler error: unexpected frame type.” when reading a frame using Single Read Sampler with JMeter and JMeter Websocket Plugin

[Chaitra M]

I am using Jmeter for the load testing of an application which includes web socket connection.

When trying to read the data in a frame using Single Read Sampler, got an error "Sampler error: unexpected frame type." and previous request reads are working fine

Please find attached the screenshot.

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[Peter Doornbosch]

“Response message: Received: Close frame….”

So your test plan is expecting a data frame, but the server is sending a close frame.