Cannot capture jmeter traffic in fiddler
First, change Fiddler's port back to 8888
as it was originally.
Next, change JMeter's proxy settings to point at 127.0.0.1
on port 8888
as its proxy settings.
Then, run your test.
JMeter allows you to specify a proxy stackoverflow.com/questions/16669947/… and you can also typically set the proxy settings for the Java VM itself.