[Nagiosplug-devel] [ nagiosplug-Bugs-1280470 ] check_procs cannot detect zombies on AIX

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Bugs item #1280470, was opened at 2005-09-02 11:35
Message generated for change (Comment added) made by psychotrahe
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Category: Parsing problem
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Andrew Elwell (elwell2000)
>Assigned to: Matthias Eble (psychotrahe)
Summary: check_procs cannot detect zombies on AIX

Initial Comment:
./check_procs -s Z -v  
Not parseable: Z           188558   98382            
<defunct> <defunct>
Not parseable: Z           196776   98382            
<defunct> <defunct>
PROCS OK: 0 processes with STATE = Z


should return 2 zombies - AIX lists them as <defunct>

>> ps auxwww | egrep "USER|def"
USER         PID %CPU %MEM   SZ  RSS    TTY STAT   
STIME  TIME COMMAND
root      188558                            Z         
    0:00 <defunct>
root      196776                            Z         
    0:00 <defunct>


>> ps -efal  | egrep "UID|def"
       F S      UID     PID    PPID   C PRI NI ADDR   
SZ    WCHAN    STIME    TTY  TIME CMD
   50005 Z     root  188558   98382   0  60 20        
                             0:00 <defunct>
   50005 Z     root  196776   98382   0  60 20        
                             0:00 <defunct>


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>Comment By: Matthias Eble (psychotrahe)
Date: 2007-07-15 17:25

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Hi Andrew,

the change should be save and is now applied to CVS like proposed.

It'd be nice, if someone could test new detection and report the result
here.

Thanks for your report.
Matthias

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Comment By: Felix Frank (illtiz)
Date: 2007-05-18 14:30

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The described patch could also work around a problem I encountered with
solars. Check procs would return correct states, but the output would be
overwritten by warning messages of the form "Not parseable: Z   107 21841  
 0    0    - defunct [newline]                                          
defunct".

I have had no opportunity to give it a try but the phenomenon appears to
be quite common.

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Comment By: wszenajch (wszenajch)
Date: 2006-10-17 13:34

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For nagios-plugins-HEAD-200610152352 I have made the
following correction to make this plugin working correctly
with processes on AIX 5.2:

In file check_procs.c find line:
if ( cols == (expected_cols - 1) && strstr(procstat, zombie) ) {

and replace it with the following:
if ( cols < expected_cols  && strstr(procstat, zombie) ) {

On AIX 5.2 it works correctly reporting total number of
processes (which was wrong before this change) and number of
zombie processes when option '-s Z' is used.

This change does not seem to affect Linux systems: I made
brief tests with OpenSUSE10.1 i386, SuSE 10.0 x86_64 and
SLES10 ia64; but other platforms i.e. Solaris should be
tested before applying this change for production.


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