# Load Testing tool and Wowza4?

**URL:** <https://community.wowza.com/t/load-testing-tool-and-wowza4/39140>\
**Category:** Wowza Streaming Engine\
**Created:** [February 23, 2014, 10:19am UTC](https://community.wowza.com/t/load-testing-tool-and-wowza4/39140 "2014-02-23T10:19:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Thomas\_Gires](https://avatars.discourse-cdn.com/v4/letter/t/e480ec/32.png) [@Thomas\_Gires](https://community.wowza.com/u/Thomas_Gires)\
**Post date:** [February 23, 2014, 10:19am UTC](https://community.wowza.com/t/load-testing-tool-and-wowza4/39140/1 "2014-02-23T10:19:07Z")

</div>

Hey folks,

I’ve been trying to run the RTMP load testing tool on Wowza4 with no success, is there any change to the install procedure, or a new version to be used?

This is what I get when I run it:

```auto
Configure logging: file:///usr/local/WowzaStreamingEngine/conf/log4j.properties
Error running test (live): java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.wowza.wms.bootstrap.Bootstrap.runTest(Bootstrap.java:1420)
        at com.wowza.wms.bootstrap.Bootstrap.main(Bootstrap.java:71)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang/SystemUtils
        at com.wowza.wms.bootstrap.BootstrapSystemTuningInfo.getSystemTuningInfo(BootstrapSystemTuningInfo.java:81)
        at com.wowza.wms.server.ServerTuningHandler.<init>(ServerTuningHandler.java:248)
        at com.wowza.wms.server.Server.<init>(Server.java:862)
        at com.wowza.wms.server.Server.getInstance(Server.java:907)
        at com.wowza.wms.logging.WMSLogger.a(WMSLogger.java:82)
        at com.wowza.wms.logging.WMSLogger.log(WMSLogger.java:190)
        at com.wowza.wms.logging.WMSLogger.info(WMSLogger.java:233)
        at com.wowza.wms.performance.remote.PerformanceRemoteClientTest.run(Unknown Source)
        at com.wowza.wms.performance.PerformanceTest.run(Unknown Source)
        at com.wowza.wms.performance.PerformanceTestList.run(Unknown Source)
        ... 6 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.SystemUtils
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 16 more

```

---

<div class="post-metadata">

**Author:** ![Andrew\_Kennedy1](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@Andrew\_Kennedy1](https://community.wowza.com/u/Andrew_Kennedy1)\
**Post date:** [February 23, 2014, 4:52am UTC](https://community.wowza.com/t/load-testing-tool-and-wowza4/39140/2 "2014-02-23T04:52:09Z")

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Hi,

You do need to use the Wowza 4 version. Please contact support@wowza.com for the latest load test tool.

Andrew.

---

<div class="post-metadata">

**Author:** ![Thomas\_Gires](https://avatars.discourse-cdn.com/v4/letter/t/e480ec/32.png) [@Thomas\_Gires](https://community.wowza.com/u/Thomas_Gires)\
**Post date:** [February 23, 2014, 8:39pm UTC](https://community.wowza.com/t/load-testing-tool-and-wowza4/39140/3 "2014-02-23T20:39:34Z")

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thanks, just emailed now