iNSTAL ON CENTOS

[system]

Hello, first the JAVA install well on Fedora_8.

An using Centos_5 and i install Java

]# ./startup.sh

Error parsing VHosts.xml (file:///usr/local/WowzaMediaServerPro/conf/VHosts.xml):

java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.w3c.dom.NodeList

java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.w3c.dom.NodeList

at com.wowza.wms.bootstrap.Bootstrap.getServerInfo(Bootstrap.java:496)

at com.wowza.wms.bootstrap.Bootstrap.startServer(Bootstrap.java:238)

at com.wowza.wms.bootstrap.Bootstrap.main(Bootstrap.java:47)

Exception in thread “main” java.lang.NoClassDefFoundError: com.wowza.wms.server.Server

at java.lang.Class.initializeClass(libgcj.so.7rh)

at java.lang.reflect.Method.invoke(libgcj.so.7rh)

at com.wowza.wms.bootstrap.Bootstrap.startServer(Bootstrap.java:246)

at com.wowza.wms.bootstrap.Bootstrap.main(Bootstrap.java:47)

Caused by: java.lang.ClassNotFoundException: java.util.concurrent.Executor not found in java.net.URLClassLoader{urls=[file:/usr/local/WowzaMediaServerPro/lib/wms-core.jar,file:/usr/local/WowzaMediaServerPro/lib/log4j-1.2.14.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-bootstrap.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-mediareader-flv.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-ant.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-mediareader-mp3.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-server.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-jlayer.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-stream-record.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-mediawriter-flv.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-stream-live.jar,file:/usr/local/WowzaMediaServerPro/lib/jid3lib-0.5.4.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-commons-modeler.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-stream-shoutcast.jar,file:/usr/local/WowzaMediaServerPro/lib/wms-stream-file.jar], parent=gnu.gcj.runtime.SystemClassLoader{urls=[file:/usr/local/WowzaMediaServerPro/bin/wms-bootstrap.jar], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}}

at java.net.URLClassLoader.findClass(libgcj.so.7rh)

at java.lang.ClassLoader.loadClass(libgcj.so.7rh)

at java.lang.ClassLoader.loadClass(libgcj.so.7rh)

at java.lang.Class.initializeClass(libgcj.so.7rh)

…3 more

When I do this

]# /usr/sbin/alternatives --config java

There are 2 programs which provide ‘java’.

Selection Command

---

• 1 /usr/lib/jvm/jre-1.4.2-gcj/bin/java

• 2 /usr/java/jre1.6.0_02/bin/java

Enter to keep the current selection[+], or type selection number: 2

[root@ns6 bin]# java -version

-bash: /usr/bin/java: No such file or directory

[root@ns6 bin]# ./startup.sh

./startup.sh: line 24: java: command not found

But if I used 1 this got the old version

1 /usr/lib/jvm/jre-1.4.2-gcj/bin/java

*+ 2 /usr/java/jre1.6.0_02/bin/java

Enter to keep the current selection[+], or type selection number: 1

[root@ns6 bin]# java -version

java version “1.4.2”

Any idea.

[Charlie_Good]

Many folks have had problems with virtual private servers and running Java applications. The virtualization system that runs many of these servers just can’t allocate a large enough contiguous block of memory to start Java applications.

Charlie

[Charlie_Good]

Excellent.

Charlie

[J_Cole]

Hello, I got the java to work

[root@ns6 bin]# JAVA_HOME=/usr/java/default; export JAVA_HOME

[root@ns6 bin]# PATH=$JAVA_HOME/bin:$PATH; export PATH

[root@ns6 bin]# java -version

java version “1.6.0_04”

JC

[Charlie_Good]

How much memory is in the machine or is it a virtual private server? It sounds like the heap size is too large for your hardware. Try lowering the heap size defined in /usr/local/WowzaMediaServerPro/bin/setenv.sh:

JAVA_OPTS="-Xmx250M"

Charlie

[Charlie_Good]

What do you get when you enter:

java -version

You can try different VM sizes by entering:

java -version -Xmx150M

Lower this number until it returns the version number. With 1GB of RAM you should be able to have a heap size of at least 250GB. What else do you have running on this machine? Is it a virtual private server? What is the OS, Java version, describe the hardware.

Charlie

[Charlie_Good]

I am not sure about Windows VPS. I don’t know of any customers that are using Wowza Pro on a Windows VPS. The RAM upgrade will probably help.

Charlie

[Richard_Lanham]

How much memory is available on the machine you installed Wowza?

Have you looked at these links?:

General Tuning

https://www.wowza.com/docs/how-to-do-performance-tuning&highlight=java+version

More Tuning, Running the Server Java VM

http://www.wowza.com/community/t/-/41 (windows)

http://www.wowza.com/community/t/-/44 (linux)

Richard

[rob_sarroff]

After completing the solution I get

Error occurred during initialization of VM

Could not reserve enough space for object heap

Could not create the Java virtual machine

any thoughts

Thanks

[rob_sarroff]

Thanks for the quick reply rrlanham. Oh!..it seems that I am only running 768M and I did know the min in 1GB.

Short of adding more can it run with less than 1GB.

…and Charlie

I tried # JAVA_OPTS=“Xmx250M” and still the same error.

[rob_sarroff]

I’m running

LINUX VPS Centos 5

32-bit jre1.5.0_15

768M RAM

java -version returns

Error occurred during initialization of VM

Could not reserve enough space for object heap

Could not create the Java virtual machine

java -version -Xmx150M returns same error

java -version -Xmx50M returns same error

[rob_sarroff]

I think I may have to go straight to Dedicated. I was hoping to do some testing before taking that leap. I will try and get a RAM upgrade.

If I was to use a Windows VPS would it make any difference?

Thanks Charlie.

[rob_sarroff]

Thanks for all the help. I just upgraded the guaranteed VPS RAM to 1024 it now works and streaming like a champion. Very happy.

Cheers

Rob