?
Solved

runtime exec leaving <defunct> processes in unix

Posted on 2002-04-26
4
Medium Priority
?
351 Views
Last Modified: 2012-05-04
I'm calling runtime.exec to call a .sh script in unix.. this is done in a loop..  i am seeing a <defunct> proceess created in unix every iteration!  this will not do..  any idea how to have runtime.exec clean up after istelf?  

the .sh script is only checking to see in another process is running..  ( ps -a | mlcserv | wc -l )
0
Comment
Question by:xjeffk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 7

Expert Comment

by:yoren
ID: 6972157
Try Process.waitFor() and see if that helps.
0
 

Author Comment

by:xjeffk
ID: 6973202
Yoren - that seems to work!  how does it have a handle to the thread, but destroy does nothing?
0
 
LVL 7

Accepted Solution

by:
yoren earned 400 total points
ID: 6974356
xjeffk,

Glad it worked for you. You had the right thinking when you said "clean up after itself." The issue is that many versions (maybe all?) of UNIX don't try to clean up child processes until the parent specifically waits for them to complete. If you want to kill a process and not leave a <defunct> child, you can try destroy() followed by waitFor() (I haven't tried this but it should work).

Leave another comment if you have more related questions.

Yuval
0
 

Author Comment

by:xjeffk
ID: 6975292
indeed.   it's solaris, and the waitFor did it..  just calling destroy without waitFor did not..

well, thanks..
0

Featured Post

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
In this post we will learn how to make Android Gesture Tutorial and give different functionality whenever a user Touch or Scroll android screen.
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
Suggested Courses
Course of the Month11 days, 21 hours left to enroll

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question