Cannot read json data using Websocket Single Read Sampler

[Former user]

I tried to read the json data in the frame of a websocket request using Websocket Single Read Sampler. But got the error :

"Response code: Sampler error: unexpected frame type. Response message: Received: Ping frame with application data 'ping'"

[Peter Doornbosch]

Hi,

This means your server is sending ping frames that your test scenario does not take into account.

The easiest way to solve this, is by adding a "Ping / Pong Frame Filter", this will make sure the ping frame doesn't show in the "Single Read Sampler". Also, check the "Automatically respond to ping with a pong" checkbox.

There is a sample in the samples directory: https://bitbucket.org/pjtr/jmeter-websocket-samplers/src/master/samples/PingFilter.jmx

Hth, Peter