How to stop java application using a shell script

Question

I have a shell script, which is run under a opensuse linux, that starts a java application (under a jar), the script is:

#!/bin/sh

#export JAVA_HOME=/usr/local/java
#PATH=/usr/local/java/bin:${PATH}

#---------------------------------#
# dynamically build the classpath #
#---------------------------------#
THE_CLASSPATH=
for i in `ls ./lib/*.jar`
do
  THE_CLASSPATH=${THE_CLASSPATH}:${i}
done

#---------------------------#
# run the application #
#---------------------------#
java -server -Xms512M -Xmx1G -cp ".:${THE_CLASSPATH}"  com.package.MyApp > myApp.out 2>&0 &

This script is working fine.

Now, what I want, is to write a script to kill gracefully this app, something that allows me to kill it with the -15 argument from Linux kill command.

The problem, is that there will be many java applications running on this server, so I need to specifically kill this one.

Any help?

Thanks in advance,

Fernando

Note your question, but you can/should put your app into a jar and just mention all of the libraries by relative path in its manifest file. See: docs.oracle.com/javase/tutorial/deployment/jar/downman.html — Dave
– Dave, Commented Mar 29, 2012 at 23:24

Joni · Accepted Answer · 2012-03-29 23:25:36Z

4

Store the process ID in a file:

java ...blabla... &
echo $! > MyApp.pid

Then you can kill the JVM with kill -TERM $(cat MyApp.pid).

Alternatively you can list the java processes on your system with jps. It lists the process ID and mainclass or jar file used to launch the application, which is probably enough to recognize your application. For example:

$ jps
20168 MyAPp
20186 Jps
$ kill -TERM 20168

More info on jps: http://docs.oracle.com/javase/1.5.0/docs/tooldocs/share/jps.html

edited Mar 29, 2012 at 23:25

answered Mar 29, 2012 at 23:19

Joni

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1 Comment

Fernando Moyano Over a year ago

Thanks @Joni Salonen, but I can't use jps. However it was very helpful.

Ignacio Vazquez-Abrams · Accepted Answer · 2012-03-29 23:18:22Z

3

Write the PID of the backgrounded app somewhere useful.

echo $! > /var/lib/MyApp.pid

Then kill that PID in your other script.

answered Mar 29, 2012 at 23:18

Ignacio Vazquez-Abrams

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1 Comment

Fernando Moyano Over a year ago

Thanks @ignacio-vazquez-abrams, the resto of the answer was found here: stackoverflow.com/questions/8884480/…

Dave · Accepted Answer · 2012-03-29 23:26:17Z

0

When you use ps xa you can get the list of running processes including the full command used to start it. If you do not want to use a temporary file like the others have mentioned, you can grep for java and also your class or jar name.

ps xa | grep java | grep com.package.MyApp | xargs kill -15

answered Mar 29, 2012 at 23:26

Dave

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