Java hangs even though shell script’s execution is completed
I'm trying to execute a script from within my java code. The execution of the script is over(it's pid is no more), but java is stuck on waitFor() method of the shell script process!. And yes, I'm reading output and error streams in 2 separate threads. Yes, they are being joined at the end(after waitFor()).
The aspect which makes this question relevant to this forum is, if I put the following line in the shell script(at the top), everything seems to work fine.
And no, interestingly enough, the script doesn't generate any output!. Zero chars!. So putting exec statement there makes no sense!
But still, magically enough, putting exec statement in the script makes java work!. Why??
How can I avoid that illogical exec statement in the script?.
exec has any other functionality here, other than redirection?
P.S: This definitely has got something to do with exec command, hence, this question is meant for shell/script guys and not necessarily for Java guys.
Hi,
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#
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HI,
I have a strange problem. A shell script that runs fine on solaris. when i ported to linux, it started hanging.
here is the core of the script
CFG_FILE=tab25.cfg
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Hello All,
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Hello All,
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if
then
# mail -s "Import failed file does not exist" sanjay.jaiswal@xyz.com
echo "FILE does not exist"
exit 1
fi
echo "FILE EXIST"
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Hi
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2.GopiRun.sh
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Hello,
I am new to this forum and relatively new to unix, but hope to become an expert soon!
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AIRPORT2-IPINSPECTOR(1) General Commands Manual AIRPORT2-IPINSPECTOR(1)NAME
airport2-ipinspector - WAN monitoring utility for the Apple AirPort Extreme Base Station ("Snow")
SYNOPSIS
airport2-ipinspector
DESCRIPTION
airport2-ipinspector monitors the WAN interface of the base station and sends an email notification whenever the external (WAN) IP address
of the base station changes.
OPTIONS
airport2-ipinspector accepts no command-line options. airport2-ipinspector is a wrapper script around the IPInspector.jar jar file located
in /usr/share/java/airport-utils.
You can set the JAVACMD environment variable to use a specific JVM instead of the one chosen by the wrapper script. Set the DEBUG environ-
ment variable to 1 to get the debug output from the wrapper script.
ENVIRONMENT VARIABLES
DEBUG Set this variable to 1 to get the debug output from the wrapper script.
JAVACMD
The full path to the Java Virtual Machine to use. By default, the wrapper uses JAVACMD; if it is not set, it looks for
JAVA_BINDIR/java, then for JAVA_HOME/bin/java before looking for a java executable in the PATH. In the latter case, the JVM used can
be configured using the Debian alternatives system (see update-alternatives(8)).
JAVA_HOME
The full path where your JDK/JRE is installed.
JAVA_BINDIR
The full path to the directory where the java executable is located.
JAVA_ARGS
Extra command-line arguments to be passed to the Java Virtual Machine.
AUTHOR
airport2-ipinspector was written by Jon Sevy <jsevy@cs.drexel.edu>.
This manual page was written by Julien BLACHE <jblache@debian.org>, for the Debian project (but may be used by others).
May 20, 2006 AIRPORT2-IPINSPECTOR(1)