zombie-process

问题 I have some troubles with Python child processes so I wrote a very simple script: import os import sys import time pid = os.fork() if pid: #parent time.sleep(30) else: #child #os._exit(0) sys.exit() While parent process is sleeping I launch ps fax | grep py[t]hon And I read this output 2577 ? S 0:00 python /home/pi/python/GPIO/GPIODaemon.py restart 2583 ? Z 0:00 \_ [python] <defunct> Using sys.exit() or os._exit(0) there is always a Zombie process and I'm unable to understand why. Working on

问题 I've seen bits of scattered information all around, but I can't seem to get to one final answer. How do you clean up a zombie thread in kernel? Just to make sure, and produce a final correct way of handling threads in kernel, I would like to ask this question more broadly. How do you create, terminate and clean up a thread in the Linux kernel? What I have so far is this: thread_func: exited = 0; while (!must_exit) do stuff exited = 1; do_exit(0) init_module: must_exit = 0; exited = 1; kthread

问题 A Zombie is created when a parent process does not use the wait system call after a child dies to read its exit status, and an orphan is child process that is reclaimed by init when the original parent process terminates before the child. In terms of memory management and the process table how are these processes handled differently, specifically in UNIX? What is an example or extreme case when the creation of zombies or orphans can be detrimental to the greater application or system? 回答1:

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . Whenever I try to run an application from Xcode it displays an error message: This happens even though the simulator is not running. I force quit the simulator process from Activity Monitor, but it shows that message again and again. If I quit and reopen Xcode it will work without error, but is there any

问题 I am getting this error from the console [Not A Type _cfTypeID]: message sent to deallocated instance I also enalbe zombie in Diagonotics but can not get any hint what the error is. My xcode is hung and throwing me the message below : and zombie shows me nothing just like what is the error about and how can i use zombie in a proper way to catch the error.. 来源： https://stackoverflow.com/questions/15170699/can-not-get-clue-from-zombie-about-a-crash

问题 I have a site which has been built in modx and when its hit with load uses up all cpu processing power and top is showing a lot of defunct php zombie processes consuming this. Here's the system specs... PHP 5.2.14 php running as suPHP Mysql 5.1.51 Apache 2.0.63 modx 1.0.4 For testing im using ApacheBench and simulating 500 connections with 100 concurrent connections I've tested this out 2 ways now... Turning off .htaccess and stress testing a simple php page that just echoes 'Hello world'. In

问题 I am kind of new at ios development and my app crashes because of EXEC_BAD_ACCESS. To detect problem i enabled Zombies and trace Allocations by using Instruments in xCode 4.5 After it detects Zombie Messaged i am having trouble to find which part of code crashes. Here is the instruments screen shot: Thanks for any help. 回答1: I also have the problem at the beginning of learning Instruments, then I figured out the I have to open the 'Extended detail' Pane to see it.(There might other easy way

问题 I am using this code p1 = Popen(['rtmpdump'] + cmd_args.split(' '), stdout=PIPE) p2 = Popen(player_cmd.split(' '), stdin=p1.stdout, stderr=PIPE) p2.wait() # try to kill rtmpdump # FIXME: why is this not working ? try: p2.stdin.close() p1.stdout.close() p1.kill() except AttributeError: # if we use python 2.5 from signal import SIGTERM, SIGKILL from os import kill kill(p1.pid, SIGKILL) when p1 terminates then p2 is terminated too. The problem is: If I manually close p2 (it's mplayer), rtmpdump

问题 I have a client whose domain seems to be getting hit pretty hard by what appears to be a DDoS. In the logs it's normal looking user agents with random IPs but they're flipping through pages too fast to be human. They also don't appear to be requesting any images. I can't seem to find any pattern and my suspicion is it's a fleet of Windows Zombies. The clients had issues in the past with SPAM attacks--even had to point MX at Postini to get the 6.7 GB/day of junk to stop server-side. I want to

问题 On my Fedora Core 9 webserver with kernel 2.6.18, init isn't reaping zombie processes. This would be bearable if it wasn't for the process table eventually reaching an upper limit where no new processes can be allocated. Sample output of ps -el | grep 'Z' : F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 5 Z 0 2648 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 1 Z 51 2656 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 1 Z 0 2670 1 0 75 0 - 0 exit ? 00:00:02 crond <defunct> 4 Z 0 2874