Run remote java server in linux script

Question

I have a Server implemented in Java named Provider, and linux script to start it.

#!/bin/bash
echo "Provider"
$JAVA_HOME/bin/java -cp /tmp  Provider&
$JAVA_HOME/bin/java -version
rm  /tmp/pid
echo "$!"> /tmp/pid
echo "Provider-finish"
exit 0

When I want to execute the following script at different machine (machine2)

root@machine1:/tmp# ssh  machine2/tmp/runScript.sh
Provider
java version "1.6.0_29"
Java(TM) SE Runtime Environment (build 1.6.0_29-b11)
Java HotSpot(TM) Client VM (build 20.4-b02, mixed mode, sharing)
Provider-finish
Waiting for connection

The problem is that after running above script, it does not return console, it hang-up though Provider gets started.

I have analized similar concepts like Glassfish domain starting. by executing

ssh machine2 asadmin start-domain

it returns console without any problem so I can get execution status "$?"

Stephen C · Accepted Answer · 2012-10-07 11:21:01Z

2

I think that the problem is that the remote sshd won't close the ssh session because there is still a java process running in the background that might try to write output.

Try redirecting the background processes stdout and stderr to "/dev/null"; e.g.

$JAVA_HOME/bin/java -cp /tmp Provider > /dev/null 2>&1 &

answered Oct 7, 2012 at 11:21

Stephen C

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1 Comment

Ahmet Karakaya Over a year ago

You are right, since java process tries to write outout sshd does not close ssh session. It is somehow understood when running same script locally. I have forwarded java process output to /dev/null as you suggested problem has been solved. Thanks.

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