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Old 06-01-2010, 04:16 AM   #1
IJustinI
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Problem running .sh script with "screen" and "java"


Hello.
I have a VPS.
I am trying to run a java application with "screen" (so I can close PuTTy and it will still run)

This is my run.sh
Code:
screen 
cd bin
echo Press Crtl + A + D to detach!
java -Xmx300m -cp .:./bin.:./deps/poi.jar:deps/mysql.jar:deps/mina.jar:deps/slf4j.jar:deps/slf4j-nop.jar:deps/jython.jar:log4j-1.2.15.jar server.Server -server
When I run this run.sh script, this is the output.

Code:
[server@agentblue ~]$ ./run.sh
[screen is terminating]
: No such file or directory
Press Crtl + A + D to detach!
Exception in thread "main" java.lang.NoClassDefFoundError: server/Server
Caused by: java.lang.ClassNotFoundException: server.Server
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
But if I then type in the commands myself
Here are the commands I type in
Code:
cd bin
java -Xmx300m -cp .:./bin.:./deps/poi.jar:deps/mysql.jar:deps/mina.jar:deps/slf4j.jar:deps/slf4j-nop.jar:deps/jython.jar:log4j-1.2.15.jar server.Server -server
The java application/server runs.

What is wrong with my run.sh script?

I have chmod'ed it to 777.
Thanks.
 
Old 06-01-2010, 04:36 AM   #2
grail
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So just to confirm, when you run the script manually you are still in your home directory?

The error on line 2 indicates that there is no bin directory in your home directory.
 
Old 06-01-2010, 04:39 AM   #3
IJustinI
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When I use the script, I am running it from /home/server/ where run.sh is located.
(server is my login for that account)
When I am typing the commands I am in /home/server/ then when I type cd bin it changes to /home/server/bin
 
Old 06-01-2010, 04:43 AM   #4
alli_yas
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Your problem here is the "cd bin" line.

In your script change it to "cd /home/server/bin" and retry - this should solve the problem.

Last edited by alli_yas; 06-01-2010 at 04:45 AM.
 
Old 06-01-2010, 04:46 AM   #5
IJustinI
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Quote:
Originally Posted by alli_yas View Post
Your problem here is the "cd bin" line.

I suspect when you manually run the command; you are first in your java install directory and then change directory to /my/java/installation/bin - where the java executable is located.

Best way to solve your problem is to add the following to your .bash_profile:

Code:
JAVA_HOME=/my/location/to/java/jdk1.6.0_20
export JAVA_HOME
PATH=$PATH:$JAVA_HOME/bin
export PATH
What this will do is setup your Java binary directory to be in your PATH environment variable.

Thereafter you can remove line 2 from your script altogether and running it thereafter (whether in a screen or not) will work
Not really.
The reason why I do 'cd bin' is because in the 'bin' is where my java .class files are.
JDK is install to /home/server/jdk1.6.0_20

Edit:

Last edited by IJustinI; 06-01-2010 at 04:50 AM.
 
Old 06-01-2010, 04:48 AM   #6
alli_yas
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Apologies - I only saw your post #3 after my previous post - which I've edited accordingly....try what I've suggested after editing.
 
Old 06-01-2010, 04:50 AM   #7
IJustinI
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I changed the 'cd bin' to 'cd /home/server/bin' and i now get this
Code:
[server@agentblue ~]$ ./run.sh
[screen is terminating]
: No such file or directory/server/bin
Press Crtl + A + D to detach!
Exception in thread "main" java.lang.NoClassDefFoundError: server/Server
Caused by: java.lang.ClassNotFoundException: server.Server
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
[server@agentblue ~]$
 
Old 06-01-2010, 04:56 AM   #8
alli_yas
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Post the output of:

Code:
#ls -la /home/server
What is the purpose of the bin directory - solely to store your class files?

I notice your java call is quite a complex one - what exactly does that do?
 
Old 06-01-2010, 04:59 AM   #9
IJustinI
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Quote:
Originally Posted by alli_yas View Post
Post the output of:

Code:
#ls -la /home/server
What is the purpose of the bin directory - solely to store your class files?

I notice your java call is quite a complex one - what exactly does that do?
Code:
[server@agentblue ~]$ ls -la /home/server
total 68
drwx------  7 server server 4096 Jun  1 13:01 .
drwxr-xr-x  3 root   root   4096 May 31 14:07 ..
-rw-------  1 server server 8328 Jun  1 13:36 .bash_history
-rw-r--r--  1 server server   33 May 31 14:07 .bash_logout
-rw-r--r--  1 server server  176 May 31 14:07 .bash_profile
-rw-r--r--  1 server server  124 May 31 14:07 .bashrc
drwxr-xr-x  5 server server 4096 Jun  1 11:53 bin
-rw-r--r--  1 server server  710 Jun  1 10:50 .classpath
drwxr-xr-x  8 server server 4096 Jun  1 12:01 Data
drwxr-xr-x  2 server server 4096 May 31 14:19 deps
drwxr-xr-x 10 root   root   4096 May 31 14:41 jdk1.6.0_20
-rw-r--r--  1 server server  383 Jun  1 10:50 .project
-rwxrwxrwx  1 server server    9 Jun  1 12:56 resume
-rwxrwxrwx  1 server server  192 Jun  1 13:53 run.sh
drwxr-xr-x  3 server server 4096 May 31 14:19 src
[server@agentblue ~]$
The java line loads a RuneScape private server as it is using .jars as deps (like framework, eg; mysql, apatch) The class file that it is should be loading is located in;
/home/server/bin/server/Server.class
 
Old 06-01-2010, 05:03 AM   #10
alli_yas
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Hmmm...then what's in /home/server/bin; if your actual class files are in /home/server/bin/server?
 
Old 06-01-2010, 05:04 AM   #11
grail
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Well this would seem to say that somewhere you are not giving us the whole picture??
Why are we getting:
Quote:
: No such file or directory/server/bin
if you have put in:
Quote:
cd /home/server/bin
the /home part seems to be missing and the directory still does not exist
 
Old 06-01-2010, 05:04 AM   #12
IJustinI
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Quote:
Originally Posted by alli_yas View Post
Hmmm...then what's in /home/server/bin; if your actual class files are in /home/server/bin/server?
[server@agentblue bin]$ ls
deps scripts server
[server@agentblue bin]$
 
Old 06-01-2010, 05:11 AM   #13
IJustinI
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Registered: Jun 2010
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Quote:
Originally Posted by grail View Post
Well this would seem to say that somewhere you are not giving us the whole picture??
Why are we getting:

if you have put in:

the /home part seems to be missing and the directory still does not exist
I don't know what piece of information I am not giving you.
If you have teamviewer you can view my computer and look around
 
Old 06-01-2010, 05:12 AM   #14
grail
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What happens if you take out the reference to screen in the script?
 
Old 06-01-2010, 05:12 AM   #15
jamescondron
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Can you not tarball it and host it somewhere so we can try it?

EDIT: After testing a simpler version your script wont work anyway, it'll start screen, then when screen terminates it'll run the java. Its procedural, you want
Code:
screen cmd

Last edited by jamescondron; 06-01-2010 at 05:16 AM.
 
  


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