# Wowza Installation on CentOS
**URL:** https://community.wowza.com/t/wowza-installation-on-centos/33675
**Category:** Wowza Streaming Engine
**Created:** [August 26, 2009, 12:09pm UTC](https://community.wowza.com/t/wowza-installation-on-centos/33675 "2009-08-26T12:09:53Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@john\_limbuvala](https://community.wowza.com/u/john_limbuvala)
#### Post date: [August 26, 2009, 12:09pm UTC](https://community.wowza.com/t/wowza-installation-on-centos/33675/1 "2009-08-26T12:09:53Z")
Hello to all here,
I am installing the evaluation version on a CentOS host.
I have installed the files and installed Java 1.6.0\_15.
When I attempt the command ./startup.sh I am getting the error:
Exception in thread “main” java.lang.NoClassDefFoundError: com/wowza/wms/bootstrap/Bootstrap
Caused by: java.lang.ClassNotFoundException: com.wowza.wms.bootstrap.Bootstrap
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: com.wowza.wms.bootstrap.Bootstrap. Program will exit.
My setenv.sh file looks like this:
#!/bin/sh
\_EXECJAVA=/usr/java/jre1.6.0\_15/bin/java
# modified by JL \_EXECJAVA=java
# old value JAVA\_OPTS="-Xmx768M"
JAVA\_OPTS="-Xmx200M"
# Uncomment to run server environment (faster), Note: will only work if server VM install, comes with JDL
#JAVA\_OPTS="$JAVA\_OPTS -server"
# Uncomment to fix multicast crosstalk problem when streams share multicast port
#JAVA\_OPTS="$JAVA\_OPTS -Djava.net.preferIPv4Stack=true"
# Uncomment to fix issue with socket code on some platforms
#JAVA\_OPTS="$JAVA\_OPTS -Djava.nio.channels.spi.SelectorProvider=sun.nio.ch.PollSelectorProvider"
WMSAPP\_HOME=/usr/local/WowzaMediaServerPro
WMSCONFIG\_HOME=/usr/local/WowzaMediaServerPro
WMSCONFIG\_URL=
export WMSAPP\_HOME WMSCONFIG\_HOME JAVA\_OPTS \_EXECJAVA
Have I done something wrong with the Java install?
Help please.
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [August 26, 2009, 8:23pm UTC](https://community.wowza.com/t/wowza-installation-on-centos/33675/2 "2009-08-26T20:23:53Z")
Change the first line of setenv.sh back to:
> \_EXECJAVA=java
What do you get when you run this command?
> java -version
This is a very low setting:
> JAVA\_OPTS=“-Xmx200M”
Are you trying to install on a low memory vps?
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [August 26, 2009, 9:26pm UTC](https://community.wowza.com/t/wowza-installation-on-centos/33675/3 "2009-08-26T21:26:20Z")
I’m not sure. That looks right. If it is a new install, I would start over: un-install Wowza and re-install it.
Richard
---
### Author:  [@john\_limbuvala](https://community.wowza.com/u/john_limbuvala)
#### Post date: [August 26, 2009, 12:49pm UTC](https://community.wowza.com/t/wowza-installation-on-centos/33675/4 "2009-08-26T12:49:38Z")
rrlanham,
Not trying to install a low memeory system, just a system for testing, I read the 200 value in another thread but have changed it back to the default now.
[root@none bin]# java -version
java version “1.6.0\_15”
Java™ SE Runtime Environment (build 1.6.0\_15-b03)
Java HotSpot™ Client VM (build 14.1-b02, mixed mode, sharing)
Did all as you said but still the same problem though:
[root@none bin]# ./startup.sh
Exception in thread “main” java.lang.NoClassDefFoundError: com/wowza/wms/bootstrap/Bootstrap
Caused by: java.lang.ClassNotFoundException: com.wowza.wms.bootstrap.Bootstrap
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: com.wowza.wms.bootstrap.Bootstrap. Program will exit.
---
### Author:  [@john\_limbuvala](https://community.wowza.com/u/john_limbuvala)
#### Post date: [August 26, 2009, 2:10pm UTC](https://community.wowza.com/t/wowza-installation-on-centos/33675/5 "2009-08-26T14:10:40Z")
Hi,
Yes that worked, thanks for the help!