Bogus PID for client on another host
Posted in 1999
Hi Family.
I wanted to write a shell script to kill every process connected to the
Informix environment. I planned to do a kill -2 on every PID in the
output of onstat -g ses. (kill -1 won't work on nohup and cron jobs
while kill -9 would not allow them to clean up. But that's another
story.)
While testing this with commands directly from the shell, I found
something interesting - a bad sign. Here is a gleaning from the output:
session #RSAM total used
id user tty pid hostname threads memory memory
5938 root - 0 - 0 8192 4824
5937 autosys - 6334 clancy 1 49152 31320
5936 root - 0 - 0 8192 4824
5933 root - 0 - 0 8192 4824
5932 onamc - 3458 tolkien 1 98304 90736
5931 root - 0 - 0 8192 4824
5930 onbcg - 3458 tolkien 1 106496 94424
5928 autosys - 6251 clancy 1 466944 366360
5920 product - -1 a1ddf037 1 65536 50192
5906 dbcxw CWILLIAM -4063121 cwilliam 1 40960 29296
5905 dbcxw CWILLIAM -4063121 cwilliam 1 155648 85696
5902 onvxw - 3458 tolkien 1 122880 90688
5886 autosys - 5975 clancy 1 2670592 1227728
5880 autosys - 5933 clancy 1 303104 148224
5878 tsr032 - 3458 tolkien 1 114688 107520
5876 onlkd - 3458 tolkien 1 122880 94440
5873 onmxb - 3458 tolkien 1 106496 97272
5865 ontnr - 3458 tolkien 1 122880 113296
Note that PID 3458 is repeated several times, although the lines it
appears on are clearly different sessions and users. The pattern is
that that host "tolkien" is another machine. (clancy is the DSA system
that I am working on.) The PIDs on the lines with host clancy are
unique and mostly OK, though they may be gone by the time I run the
PS. But that repeated PID 3458 for the clients on another host is a
mystery. It does not represent a process in my system at all.
Note also the negative numbers in the PID field on some other lines.
These are client-server clients like PowerBuilder or something elso
running on PC's. There are many in the actual output.
Bottom line:
How do I kill the remote client? Or rather, how do I sever the
connection so that the remote client knows it has been cut (with an
error message from its side of the connection)?
What does that bogus PID represent anyway?
Thanks.
--
+---- Jacob Salomon DBA JSalomon@bn.com ------------------+
|(In perpetual pursuit of undomesticated semi-aquatic avians)|
| The expedient performance of a task with excessive concern |
| regarding its duration-to-completion engenders a virtual |
| certainty of diminished benefit therefrom. |
| -- Benjamin Franklin (but he said it in 3 words) |
+------------------------------------------------------------+
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