# java.lang.ClassNotFoundException
**URL:** https://community.wowza.com/t/java-lang-classnotfoundexception/251
**Category:** Wowza Streaming Engine
**Created:** [January 4, 2008, 1:40pm UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251 "2008-01-04T13:40:34Z")
**Posts on this page:** 13
**Page:** 1
### Author:  [@system](https://community.wowza.com/u/system)
#### Post date: [January 4, 2008, 1:40pm UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/1 "2008-01-04T13:40:34Z")
I have freshly installed Java SE and Wowza 1.3.1. I have copied mymodules.jar from a working system to this new system. Also all configuration is the same. But when I try to connect, Wowza gives the following error: java.lang.ClassNotFoundException: com.adv.wms.module.ModuleEvents
What can be the problem. I appreciate your help.
Thanks,
Ibrahim ULUDAG
Configure logging: file:///C:/Program Files/Wowza Media Systems/Wowza Media Serv
er Pro 1.3.1/conf/log4j.properties
INFO server server-start Wowza Media Server Pro Evaluation License 1.3.1 build47
44 -
INFO server comment - Serial number: XXXXX-XXXXX-XXXXX-XXXXX-XW3CG
INFO server comment - Maximum connections: Unlimited
INFO server comment - Hardware Available Processors: 8
INFO server comment - Max File Descriptor Count: Unlimited
INFO server comment - OS Name: Windows 2003
INFO server comment - OS version: 5.2
INFO server comment - OS architecture: x86
INFO server comment - Java vendor: Sun Microsystems Inc.
INFO server comment - Java version: 1.6.0\_03
INFO server comment - Java home: C:\Program Files\Java\jre1.6.0\_03
INFO server comment - Java max heap size: 762MB
INFO server comment - CMDInterface now listening: [any]:8083
INFO vhost vhost-start _defaultVHost_ -
INFO server comment - vhost home directory: C:\Program Files\Wowza Media Systems
\Wowza Media Server Pro 1.3.1
INFO vhost comment _defaultVHost_ RTMP/RTMPT bind attempt ([any]:1935)
INFO vhost comment _defaultVHost_ Bind successful ([any]:1935)
ERROR server comment - loadModFunctions: java.lang.ClassNotFoundException: com.a
dv.wms.module.ModuleEvents
java.lang.ClassNotFoundException: com.adv.wms.module.ModuleEvents
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.wowza.wms.util.ModuleUtils.addModuleToApp(Unknown Source)
at com.wowza.wms.util.ApplicationUtils.loadModules(Unknown Source)
at com.wowza.wms.util.ApplicationUtils.loadConfigFile(Unknown Source)
at com.wowza.wms.application.ApplicationInstance.loadConfig(Unknown Sour
ce)
at com.wowza.wms.application.ApplicationInstance.(Unknown Source)
at com.wowza.wms.application.Application.getAppInstance(Unknown Source)
at com.wowza.wms.module.ModuleConnect.connect(Unknown Source)
at com.wowza.wms.request.RequestProcessFunctions.processFunctions(Unknow
n Source)
at com.wowza.wms.request.RequestAdapter.service(Unknown Source)
at com.wowza.wms.server.ServerHandler.serviceRequest(Unknown Source)
at com.wowza.wms.server.ServerHandler.handleMessageReceived(Unknown Sour
ce)
at com.wowza.wms.server.ServerHandler.messageReceived(Unknown Source)
at org.apache.mina.common.support.AbstractIoFilterChain$2.messageReceive
d(Unknown Source)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageR
eceived(Unknown Source)
at org.apache.mina.common.support.AbstractIoFilterChain.access$900(Unkno
wn Source)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.mess
ageReceived(Unknown Source)
at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flus
h(Unknown Source)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(Unkn
own Source)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageR
eceived(Unknown Source)
at org.apache.mina.common.support.AbstractIoFilterChain.access$900(Unkno
wn Source)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.mess
ageReceived(Unknown Source)
at org.apache.mina.filter.executor.ExecutorFilter.processEvent(Unknown S
ource)
at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.
run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
ERROR server comment - loadModFunctions: java.lang.ClassNotFoundException: com.a
dv.wms.module.ModuleServerSide
java.lang.ClassNotFoundException: com.adv.wms.module.ModuleServerSide
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.wowza.wms.util.ModuleUtils.addModuleToApp(Unknown Source)
at com.wowza.wms.util.ApplicationUtils.loadModules(Unknown Source)
at com.wowza.wms.util.ApplicationUtils.loadConfigFile(Unknown Source)
at com.wowza.wms.application.ApplicationInstance.loadConfig(Unknown Sour
ce)
at com.wowza.wms.application.ApplicationInstance.(Unknown Source)
at com.wowza.wms.application.Application.getAppInstance(Unknown Source)
at com.wowza.wms.module.ModuleConnect.connect(Unknown Source)
at com.wowza.wms.request.RequestProcessFunctions.processFunctions(Unknow
n Source)
at com.wowza.wms.request.RequestAdapter.service(Unknown Source)
at com.wowza.wms.server.ServerHandler.serviceRequest(Unknown Source)
at com.wowza.wms.server.ServerHandler.handleMessageReceived(Unknown Sour
ce)
at com.wowza.wms.server.ServerHandler.messageReceived(Unknown Source)
at org.apache.mina.common.support.AbstractIoFilterChain$2.messageReceive
d(Unknown Source)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageR
eceived(Unknown Source)
at org.apache.mina.common.support.AbstractIoFilterChain.access$900(Unkno
wn Source)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.mess
ageReceived(Unknown Source)
at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flus
h(Unknown Source)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(Unkn
own Source)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageR
eceived(Unknown Source)
at org.apache.mina.common.support.AbstractIoFilterChain.access$900(Unkno
wn Source)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.mess
ageReceived(Unknown Source)
at org.apache.mina.filter.executor.ExecutorFilter.processEvent(Unknown S
ource)
at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.
run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
INFO application app-start _definst_ mymodules/_definst_
INFO session connect-pending 81.214.12.150 -
INFO session connect 81.214.12.150 -
---
### Author:  [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)
#### Post date: [January 4, 2008, 5:56am UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/2 "2008-01-04T05:56:08Z")
Did you copy mymodules.jar to /usr/local/WowzaMediaServerPro/lib? It might also be a permission problem. Check the file permissions on /usr/local/WowzaMediaServerPro/lib/mymodules.jar. If you still can’t figure it out zip up your lib, conf and logs folders and send them to charlie@wowza.com.
Charlie
---
### Author:  [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)
#### Post date: [February 28, 2011, 4:22am UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/3 "2011-02-28T04:22:23Z")
Please post the error you are seeing in the logs. Have you added anything (modues, .jar files) to your instance. We need a lot of detail to help.
Charlie
---
### Author:  [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)
#### Post date: [February 28, 2011, 5:57am UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/4 "2011-02-28T05:57:46Z")
What folder did you copy the .jar file into? What version of Wowza are you running on EC2 and what version are you running locally? What version of Java are you running locally and on EC2?
Charlie
---
### Author:  [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)
#### Post date: [February 28, 2011, 6:21am UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/5 "2011-02-28T06:21:14Z")
The jar files goes in the home/wowza/lib folder.
Charlie
---
### Author:  [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)
#### Post date: [February 28, 2011, 6:40am UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/6 "2011-02-28T06:40:41Z")
I believe you sent me a not saying it is working. Is that correct? Do be sure you re-start Wowza after uploading .jar files. This is required. The .jar files are loaded at server startup.
Charlie
---
### Author:  [@\_304\_brahim\_ULUDA\_28](https://community.wowza.com/u/_304_brahim_ULUDA_28)
#### Post date: [January 4, 2008, 2:09pm UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/7 "2008-01-04T14:09:22Z")
Thanks for your quick reply,
I have checked the permissions and there is no problem with it. I am sending the files. We are on Windows 2003 Server SP2.
I have sent the files to your email address.
Thanks for your help.
---
### Author:  [@Simon\_Bailey](https://community.wowza.com/u/Simon_Bailey)
#### Post date: [February 28, 2011, 11:28am UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/8 "2011-02-28T11:28:30Z")
Hi,
Am I am having similar issues on a Linux EC2 instance, pretty much a duplicate of the thread description, was there a solution found for this?
---
### Author:  [@Simon\_Bailey](https://community.wowza.com/u/Simon_Bailey)
#### Post date: [February 28, 2011, 1:35pm UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/9 "2011-02-28T13:35:34Z")
Hi Charlie,
Ok here is the low down:
- Application dir i.e. myexample in (1) applications (2) conf.
- Application.xml edited to include the following:
- Wowza module = myexample.jar and has the following package structure: com.newtriks.module.MyExampleModule
- Permissions on myexample.jar are changed and opened up:
---
### Author:  [@Simon\_Bailey](https://community.wowza.com/u/Simon_Bailey)
#### Post date: [February 28, 2011, 2:14pm UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/10 "2011-02-28T14:14:09Z")
> What folder did you copy the .jar file into?
home/wowza/conf
> What version of Wowza are you running on EC2 and what version are you running locally?
On the EC2 its using the ami-5453a53d AMI
Locally I am running 2.2.3
> What version of Java are you running locally and on EC2?
1.6.0\_22
---
### Author:  [@Simon\_Bailey](https://community.wowza.com/u/Simon_Bailey)
#### Post date: [February 28, 2011, 2:20pm UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/11 "2011-02-28T14:20:18Z")
Seems the JAR was a dud, it took a recompile and server reboot to get it connecting now so all sorted. What is odd is that the JAR worked locally though?
If I was to copy the build specifics for the ANT build to another IDE are there any gotchas to get the jar to compile?
---
### Author:  [@Simon\_Bailey](https://community.wowza.com/u/Simon_Bailey)
#### Post date: [February 28, 2011, 2:35pm UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/12 "2011-02-28T14:35:40Z")
Sorry I typed it wrong above, I did indeed put it into the lib directory.
---
### Author:  [@Simon\_Bailey](https://community.wowza.com/u/Simon_Bailey)
#### Post date: [February 28, 2011, 2:57pm UTC](https://community.wowza.com/t/java-lang-classnotfoundexception/251/13 "2011-02-28T14:57:30Z")
Hi Charlie,
To confirm, yes it is working now thank you. There seems to be an issue where the JAR is not getting compiled correctly on every build and therefore a JAR with missing information was uploaded to the server. Running the ANT build sometimes results in a JAR thats 4k for example, then an immediate re-run of the ANT build produces a JAR of 8k, so it seems the build process is the root of my issues.
Thanks again,
Simon