Date: Tue, 6 Sep 2005 20:22:30 GMT From: Jason Gardiner <gardiner@sprint.net> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/85810: nslookup/dig Hang and processes cannot be killed Message-ID: <200509062022.j86KMUb2003462@www.freebsd.org> Resent-Message-ID: <200509062030.j86KUAFq059357@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 85810
>Category: misc
>Synopsis: nslookup/dig Hang and processes cannot be killed
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Sep 06 20:30:10 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Jason Gardiner
>Release: 5.4
>Organization:
Sprint
>Environment:
FreeBSD config-east.sprintlink.net 5.4-RELEASE FreeBSD 5.4-RELEASE #0: Sat Sep 3 01:02:55 EDT 2005 root@config-east.sprintlink.net:/usr/src/sys/i386/compile/GENERIC-SMP i386
>Description:
Running either a dig or nslookup frequently causes the shell window to hand after returning the query response but before returning a prompt. ^C or ^D do not stop the process.
Non-authoritative answer:
Name: www.usair.com
Address: 151.193.204.72
> exit
^C^C^C^D
^D
^C^C^C
Later, I noticed that the processes are still running. I attempted to perform a kill -9, a killall -9 and a kill -17, but the processes remain:
config-east# ps -aux | grep nslookup
root 6418 0.0 0.1 4196 2560 p0- R 1:57PM 0:00.01 nslookup
twit 86489 0.0 0.1 4060 2352 p0- R 10:02AM 0:00.01 nslookup elle
gardiner 86512 0.0 0.1 4060 2452 p0- R 10:04AM 0:00.01 nslookup jay
gardiner 90668 0.0 0.1 4060 2452 p0- R 10:34AM 0:00.01 nslookup www.
twit 12643 0.0 0.1 4060 2420 p1 T+ 3:47PM 0:00.01 nslookup sl-b
gardiner 6407 0.0 0.1 3976 2364 p3- R 1:57PM 0:00.01 nslookup
gardiner 90680 0.0 0.1 4124 2516 p3- R 10:35AM 0:00.01 nslookup
I tried dig, with the same results. I built BIND9 from the ports and used the newly built resolver with the same results. Environment settings appear to have no effect.
This is an almost generic kernel rebuild. The only settings changed were
options SMP
options SCHED_ULE
>How-To-Repeat:
Perform nslookup either from a command line or interactive.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200509062022.j86KMUb2003462>