Getting Response code: Non HTTP response code: java.net.ConnectException for some of the samples in Jmeter

Vivek Kumar

Trying to hit Rest API web service through Jmeter for a range of users. (20, 30,50,80 users). 80% of the request samples get processed, but around 20% of the samples error out with below message under sampler Result.

"Response code: Non HTTP response code: java.net.ConnectException Response message: Non HTTP response message: Connection timed out: connect".

Is it the issue with Jmeter or server side? What is the resolution for this?

Dmitri T

Usually timeout indicates a problem on the server side. Few things to check:

  1. Make sure that your web server and/or database are configured to accept as many as 80 concurrent connections
  2. Monitor your server status during the load test manually or i.e. using JMeter PerfMon plugin to see whether the server is capable of bearing such load.
  3. Try playing with ramp-up to gradually increase the load to determine the point where time outs start occuring
  4. Alternatively you can limit requests per second via Constant Throughput Timer and increase its value to get exact maximum requests per second your application is able to handle - perhaps it'll give you some clues.

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