03-07-2007
Quote:
Originally Posted by jacoden
sb008,
I know that kill command is not the best bet to stop a process...but,I have observed in many such kind of cases that kill 'is a better choice' as stopping the process using the 'decent way' might end up in many 'zombie' processes...
Why is that?
Then possibly that should be a bug with respect to the parent which refuses to reap the exit status and process statistics of the child.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I have a task that Im stuck on. I have an elementary script named 'myscript' that prints "the script is running" once a second. It runs for 27 seconds. I need to write a 2nd script that starts 'myscript' and takes a parameter '$1' for a number. my 2nd script then needs to pause myscript... (1 Reply)
Discussion started by: daneensign
1 Replies
2. Web Development
I need to restart my apache, but apachectl configtest tells me that
Syntax error on line 208 of /etc/httpd/conf/httpd.conf:
Cannot load /usr/local/apache/libexec/libphp4.so into server: /usr/local/apache/libexec/libphp4.so: undefined symbol: ap_signal
I've tried rebuilding php, I'm not... (2 Replies)
Discussion started by: tatebn
2 Replies
3. Shell Programming and Scripting
Hello All,
I was wondering if someone can help me to develop restart logic for a Korn Shell program (a master script) that I am developing. The program is design to invoke a series of child processes (Korn Shell Scripts) whose function is to create a series of load files on a specified mount... (0 Replies)
Discussion started by: jonesdk5
0 Replies
4. Web Development
Hi, I have a PHP application that starts a couple of processes on the server...the problem is that if I restart apache those running apps will die.
How can I start them in a way that they are not killed when I restart/stop apache ?
$cmdstr = "nohup ".$config."/".$config."... (6 Replies)
Discussion started by: valiadi
6 Replies
5. Shell Programming and Scripting
I have posted this on the Web subforum but it seems that nobody knows to do this, maybe someone has a solution here. Thank you
I have a PHP application that starts a couple of processes on the server...the problem is that if I restart apache those running apps will die.
How can I start them... (1 Reply)
Discussion started by: valiadi
1 Replies
6. Shell Programming and Scripting
Here it goes from my unexperienced point of view. I am using CentOS 5.6. I have a Java based server that needs to be running 24/7/365. To begin from the machine the server is on rebooting; I SSH in to a shell, cd to the server dir, screen -S server1, and execute ./exec (listed below) in the screen.... (12 Replies)
Discussion started by: MacG32
12 Replies
7. Shell Programming and Scripting
Hi,
I have a problem with running out of memory in my Ubuntu web server (4GB RAM) because many people try to access my server.
I used to restart manually my apache server to clear out the memory & swap.
Can anyone tell me how to write bash script that can automatically restart apache when... (2 Replies)
Discussion started by: nica
2 Replies
8. Red Hat
Hi
Im apache service restart
Error
$ service httpd reload
Reloading httpd:
service httpd reload
Reloading httpd:
service httpd start
Starting httpd: (98)Address already in use: make_sock: could not bind to address :80
(98)Address already in... (1 Reply)
Discussion started by: mnnn
1 Replies
9. Red Hat
When I update the server with new SSL certificates, and restart httpd, I get errors :
# service httpd restart
Stopping httpd:
rm: cannot remove `/usr/local/apache2/bin/httpd/logs/httpd.pid': Not a directory
Starting httpd: ... (0 Replies)
Discussion started by: anaigini45
0 Replies
10. Shell Programming and Scripting
Hello,
My operating system is ubuntu 16.04. I need to kill or restart a shell script when cpu usage of related process is equal to 0.0% for X seconds. Appearing name on top page is vlc
While surfing on forums, I found below script but not sure how to edit:
Also don't know the function of -gt... (7 Replies)
Discussion started by: baris35
7 Replies
LEARN ABOUT XFREE86
preap
preap(1) User Commands preap(1)
NAME
preap - force a defunct process to be reaped by its parent
SYNOPSIS
preap [-F] pid...
DESCRIPTION
A defunct (or zombie) process is one whose exit status has yet to be reaped by its parent. The exit status is reaped via the wait(3C),
waitid(2), or waitpid(3C) system call. In the normal course of system operation, zombies may occur, but are typically short-lived. This may
happen if a parent exits without having reaped the exit status of some or all of its children. In that case, those children are reparented
to PID 1. See init(1M), which periodically reaps such processes.
An irresponsible parent process may not exit for a very long time and thus leave zombies on the system. Since the operating system destroys
nearly all components of a process before it becomes defunct, such defunct processes do not normally impact system operation. However, they
do consume a small amount of system memory.
preap forces the parent of the process specified by pid to waitid(3C) for pid, if pid represents a defunct process.
preap will attempt to prevent the administrator from unwisely reaping a child process which might soon be reaped by the parent, if:
o The process is a child of init(1M).
o The parent process is stopped and might wait on the child when it is again allowed to run.
o The process has been defunct for less than one minute.
OPTIONS
The following option is supported:
-F Forces the parent to reap the child, overriding safety checks.
OPERANDS
The following operand is supported:
pid Process ID list.
EXIT STATUS
The following exit values are returned by preap, which prints the exit status of each target process reaped:
0 Successfully operation.
non-zero Failure, such as no such process, permission denied, or invalid option.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWesu (32-bit) |
+-----------------------------+-----------------------------+
| |SUNWesxu (64-bit) |
+-----------------------------+-----------------------------+
SEE ALSO
proc(1), init(1M), waitid(2), wait(3C), waitpid(3C), proc(4), attributes(5)
WARNINGS
preap should be applied sparingly and only in situations in which the administrator or developer has confirmed that defunct processes will
not be reaped by the parent process. Otherwise, applying preap may damage the parent process in unpredictable ways.
SunOS 5.10 26 Mar 2001 preap(1)