Newbie: Cannot run SNAP server emulator

[sgouros]

Hello everybody

I have just downloaded SNAP SDK, installed succesfully and compiled the HelloWorld MIDlet. However, when I run the emu.bat file which starts the SNAP Server emulator, I get the following output:


C:\Program Files\Nokia\SNAPMobile\tools\ServerEmulator>java -Demulate.VSC=true -
jar sm-emu.jar

VSC emulation is on!

[server started] protocol = http, port = 8080

[archived user] name = test1
[archived user] name = test2
[archived user] name = test3
[archived user] name = test4
[archived user] name = test5
[archived user] name = test6
[archived user] name = test7
[archived user] name = test8
[archived user] name = test9
[archived user] name = test10
[new game class]: name = Test, id = 49152
[archived ranking column] foo, 4 entries
[archived ranking column] bar, 3 entries
[new game class id] = 49152
[new lobby] name = Lobby6
[new lobby] name = Lobby5
[new lobby] name = Lobby4
[new lobby] name = Lobby3
[new lobby] name = Lobby2
[new lobby] name = Lobby1
[new lobby] name = Random
[new lobby] name = Join
[new lobby] name = Sort
[new lobby] name = Challenge
trace host = null
trace port = 0
[sessionreaper] started
Exception in thread "main" java.net.BindException: Address already in use: JVM_Bind
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.PlainSocketImpl.bind(Unknown Source)
at java.net.ServerSocket.bind(Unknown Source)
at java.net.ServerSocket.<init>(Unknown Source)
at java.net.ServerSocket.<init>(Unknown Source)
at com.nokia.sm.emu.Main.<init>(Unknown Source)
at com.nokia.sm.emu.Main.main(Unknown Source)

Note that when I tried to run emu.bat on a different computer, everything went just fine (no exception reported)

Could anybody give me a hint on why the emulator throws an exception on my computer?

I have jdk1.5.0_06 and WTK23 installed on WinXP pro SP2. I also use NetBeans 5.5

Thanks in advance

George

[juarezjunior]

Hi George,

"Exception in thread "main" java.net.BindException: Address already in use: JVM_Bind"

I think this error is happening because a port is being used by another application. I've experienced that a lot of times, when running Java app servers on computers where other software and/or servers (mainly IIS) were using a target port.

This is the description from the Javadocs for BindException:

"Signals that an error occurred while attempting to bind a socket to a local address and port. Typically, the port is in use, or the requested local address could not be assigned."

Use the Control Panel > Administrative Tools > Services option in Windows and check which services are started, try stoping the ones you think could hinder you and try restarting the SNAP server...do it until you get it started properly...

Hope it helps!

BR,

Juarez Junior

[SM Tech]

Hi,

Specifically, the way to start the emulator on another port is to edit "emu.bat" in the ServerEmulator directory, and add the following extra argument to the end of the command line (after the %1):

" -port <portnum>"

So, the whole command to launch the emulator on port 8081 should look like:

"java -Demulate.VSC=true -jar sm-emu.jar %1 -port 8081"

Also, be sure to edit the "SNAP-Mobile-Port" parameter in the .jad file of any sample all you want to run against the emulator, to match the new port the emulator is running on.

Hope this helps,
Sam

[juarezjunior]

Hi Sam,

Thanks a lot for sharing this information, it's always good to know the options.

BR,

Juarez Junior

[vimcool]

Hi,

Even im facing problem while launching the SNAP emulator environment SDK1.3

I use the following commands to launch

Command 1 : java -Demulate.VSC=true -jar sm-emu.jar
Command 2 : java -jar sm-emu.jar com.nokia.sm.emu.gui.main

In both the cases it gives me the following error :

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/nokia/sm/emy/gui/Main <Unspported major.major version 49.0>
	at java.lang.ClassLoader.defineClass0<Native Method>
	at java.lang.ClassLoader.defineClass0<Unknown Source>
	at java.security.SecureClassLoader.defineClass<Unknown Source>
	at java.net.URLClassLoader.defineClass<Unknown Source>
	at java.net.URLClassLoader.access$100<Unknown Source>
	at java.security.AccessController.doPriviledged<Native Method>
	at java.net.URLClassLoader.findClass<Unknown Source>
	at java.lang.ClassLoader.loadClass<Unknown Source>
	at sun.misc.Launcher$AppClassLoader.loadClass<Unknown Source>
	at java.lang.ClassLoader.defineClass<Unknown Source>
	at java.lang.ClassLoader.defineClassinternal<Unknown Source>

Please suggest a solution soon.

[heihauki]

Which JDK/Java version are you using?

I am able to run the emulator at least with Java 2 Platform Standard Edition binary (1.5.0).

- Heidi

[juarezjunior]

Hi vimcool,

Check the Javadoc description for this error:

"Thrown when the Java Virtual Machine attempts to read a class file and determines that the major and minor version numbers in the file are not supported."

I think you must change your JSE version (update) in order to run it properly as Heidi has suggested.

Juarez Jr