Java.net.SocketException connection reset error in .net application

Question

We have a n-tier (.net) web application where we have a Web tier -> App tier -> Database.

Everything worked fine until we went for load testing (using jmeter).

Answer 1

If you're absolutely sure that it is nothing wrong with your server and the problem is on JMeter side you can try following steps from Connection Reset since JMeter 2.10 ? wiki page, to wit:

1. Change implementation of all your HTTP Request samplers to HTTPClient4. The best way to do it is via HTTP Request Defaults.

2. Add the next 2 lines to user.properties file (lives under /bin folder of your JMeter installation):

   httpclient4.retrycount=1
   hc.parameters.file=hc.parameters
   

3. In hc.parameters file (same location - /bin folder of your JMeter installation) add the next line:

   http.connection.stalecheck$Boolean=true
   

4. Restart JMeter instance so it could read updated properties and restart your test.

Answer 2

Your server is most probably overloaded as a result of your load test.

So it starts rejecting connections which appear as Connection Reset error.

So 3 options:

• your load profile is too aggressive based on real traffic

• your load profile is ok, your server is not correctly configured or undersized

• your application cannot handle this load

You can check this by slowing rampup to see when you start facing issues.

Answer 3

If I am performing a distributed testing, should I do the following steps on all my slave systems as well, not to get the "connection reset" error..?

Add the next 2 lines to user.properties file (lives under /bin folder of your JMeter installation):

httpclient4.retrycount=1
hc.parameters.file=hc.parameters

In hc.parameters file (same location - /bin folder of your JMeter installation) add the next line:

http.connection.stalecheck$Boolean=true

Answer 4

IIS logs were helpful in digging into the root cause. We found that there were network connection exceptions in all the request where we were facing Socket issues.