How to record a JNLP/ Java Web Start application w

I need to do a performance test for JNLP accessible application.

I used WireShark and see that the jnlp generates only TCP traffic.

I read all the post related with jnlp perf testing and I tried with Apache JMeter + UbikLoadPack Java Serialization plugin but jmeter does not capture the traffic.

Is it my only option capture the TCP traffic and work with that ?

Regards, Jaime

If traffic is HTTP(s), as per documentation of UbikLoadPack bundle, You need to follow the instructions of paragraphs:

1/Add JMeter certificate authority to the cacerts file used by Java:

See in documentation "Configuring Application for HTTPS" (Pages 7/8). This will allow your application to work when using JMeter as proxy if traffic is HTTPS

Steps are the following:

Start JMeter
Use File > Templates... Menu item, then select "Recording" Template and click Create
Start HTTP(S) Test Script Recorder by clicking on Start Button
JMeter will generate a Certificate Authority in 2 formats in jmeter/bin folder:
- ApacheJMeterTemporaryRootCA.crt
- ApacheJMeterTemporaryRootCA.usr
Find cacerts file used by your system, it should be in JAVA_HOME/jre/lib/security/cacerts
Run:

keytool -keystore cacerts -importcert -alias jmeter_ca -file <path to jmeter>/bin/ApacheJMeterTemporaryRootCA.crt

keystore password is usually "changeit"
enter "yes" for "Trust this certificate?" question

References:

https://docs.microsoft.com/en-us/azure/java-add-certificate-ca-store
https://stackoverflow.com/a/11937940/460802
https://stackoverflow.com/a/8980460/460802

2/To set JMeter as proxy of JNLP:

Open the Java Control Panel

Click Network Settings. The Network Settings dialog box opens.
Select Use proxy server, enter the proxy server name (localhost), and port number (8888 for JMeter).

Click Advanced and check "Use same proxy server for all protocols":

- Click Apply - Restart your application again

See reference documentation:

https://docs.oracle.com/javase/7/docs/technotes/guides/jweb/networking/proxie_config.html
Force java web start to use a proxy like Fiddler without touching code

If it’s not HTTP, the plugin does not support it.