WebSocket plugin for Jmeter

Question

Can someone share me a link with plugin sampler for Websocket protocol for JMeter?

I tried to install from the link below: https://github.com/kawasima/mod_proxy_websocket.
But not sure how to get that.

I am new to the tool.
Thanks and appreciated.

Solution 1

Link in your question looks to be not for jmeter plugin but for proxying module for Apache http server.
Correct link seems to be https://github.com/kawasima/jmeter-websocket - jmeter plugin for WebSocket protocol.

To use it you have to:

• download project sources;
• build ApacheJMeter_WebSocket.jar using maven;
• place jar into $JMETER_HOME/lib/ext/ dir.

---

Jar files successfully built from sources using maven 3.0 (mvn validate compile package):

• ApacheJmeter_websocket-0.1.0-SNAPSHOT.jar
• ApacheJmeter_websocket-dist-0.1.0-SNAPSHOT.jar - with dependencies.

WebSocket Sampler available in the list of Samplers:

Solution 2

Here is another WebSocket plugin for JMeter. It supports the RFC6455 (v13) of the WebSocket protocol.

Link: https://github.com/maciejzaleski/JMeter

Features:

• Supports HTTS/HTTPS (ws/wss) version of the WebSocket protocol
• Option to ignore SSL certificate errors
• Streaming allows for a single connection to remain open for the duration of the test
• Response has to match predefined regular expression
• Response timeout
• Response message backlog (build the Sampler response from multiple server messages)
• Connection could be closed if server sends a message matching predefined regular expression

Solution 3

Here is another (fairly new) JMeter WebSocket plugin: https://bitbucket.org/pjtr/jmeter-websocket-samplers.

See the readme for current features; it's still in active development.

Solution 4

I can`t comment previous post. But this plugin has one problem with concurency when running a large quantity of threads. I got this error:

[Problems]
 - Unexpected error: null
java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:953)
java.util.LinkedList$ListItr.next(LinkedList.java:886)
JMeter.plugins.functional.samplers.websocket.ServiceSocket.getResponseMessage(ServiceSocket.java:125)
JMeter.plugins.functional.samplers.websocket.WebSocketSampler.sample(WebSocketSampler.java:156)
org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:429)
org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:257)
java.lang.Thread.run(Thread.java:744)

So I just replaced one line in the ServiceSocket.java:

protected Deque<String> responeBacklog = new LinkedList<String>();

with this line:

Queue<String> responeBacklog = new ConcurrentLinkedQueue<String>();

It solved my problem :)

View more solutions

Comments

[Dmitri T]

Could you please add Ant/Maven/Ivy/whatever build system configuration so the one could build a jar from sources?

[Maciej Zaleski]

I know I will have to do this at some point when I get some time. There is already build JAR under Releases which you can download and put into JMeter lib/ext folder. You will also need dependencies as per Wiki page.

[Ahsan Zaheer]

Maciej: your jar file didn't seem to work for me, can you help?

[Dmitri T]

I'm receiving following on attempt to use your plugin: - Unexpected error: null JMeter.plugins.functional.samplers.websocket.ServiceSocket.s‌​endMessage(ServiceSo‌​cket.java:131) JMeter.plugins.functional.samplers.websocket.WebSocketSample‌​r.sample(WebSocketSa‌​mpler.java:102) org.apache.jmeter.threads.JMeterThread.process_sampler(JMete‌​rThread.java:429) org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java‌​:257) java.lang.Thread.run(Thread.java:744)

[Maciej Zaleski]

I suspect that there was either a connection problem (incorrect host name) or a race condition. In either case the problem should now be fixed and additional messages should shed more light on the problem. I will shortly release update on GitHub The sampler will show diagnostic messages when opened in the Results tree.

[Dmitri T]

Thanks a lot Maciej, version 1.0.1 works like a charm.

[Arijeet Saha]

Thor has a problem of closing the websocket conenction and not able to keep it idle. Loadtesting is difficult to acheive.

[Praveen]

Where is that file located?