JMeter CSV file path reading issue in ALT

Question

I am running a JMeter test plan in Azure Load Testing (ALT). My use case involves reading different JSON files, so I’m using a jsonpath.csv file in the CSV config with a variable name ERequestBody. In the request body, I’m using the following expression to read the JSON:

${__eval(${__FileToString(${ERequestBody},,)})}

This setup works perfectly in my local JMeter, but it fails when executed in ALT. I’ve placed the JMX, CSV, and JSON files directly (not inside any folder). What should I specify in the JMeter request so that it correctly reads the JSON file from the path provided in the CSV while running in ALT?

 

Answer 1

In Azure Load Testing, JMeter does not see your local file paths. ALT unpacks all uploaded files into the /jmeter/user-files directory. So any path coming from your CSV must be relative to that folder.

Fix:

Upload your CSV and JSON files to ALT in the same upload bundle as the JMX.

In your CSV, keep only the file name, not a full or local path. Example: payload1.json

In your sampler, read it like this: ${__FileToString(/jmeter/user-files/${ERequestBody},,)}

You do not need __eval in ALT.

I think this works because ALT resolves files only from /jmeter/user-files. Let me know how this worked.

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