Date: Tue, 12 Apr 2005 16:50:40 GMT From: Mark Wolgemuth <mark@employease.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/72979: unkillable process(es) stuck in `STOP' state Message-ID: <200504121650.j3CGoeoa061365@freefall.freebsd.org>
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The following reply was made to PR kern/72979; it has been noted by GNATS. From: Mark Wolgemuth <mark@employease.com> To: freebsd-gnats-submit@FreeBSD.org Cc: Subject: Re: kern/72979: unkillable process(es) stuck in `STOP' state Date: Tue, 12 Apr 2005 12:34:58 -0400 I just had this 'STOP' thread unkillable proc behavior with this setup: 5.3-RELEASE-p7 My kernel is GENERIC + SMP option + ipfw options. I run these packages inside a jail. The jail is a clone of the host system, plus the packages. The host system has only the cyrus-sasl pkgs to support smtp/auth, nothing else. The jail has these: pkg: spamass-milter: spamass-milter-0.2.0_5 pkgs for spamassassin: p5-Digest-HMAC-1.01 Perl5 interface to HMAC Message-Digest Algorithms p5-Digest-SHA1-2.10 Perl interface to the SHA-1 Algorithm p5-HTML-Parser-3.38 Perl5 module for parsing HTML documents p5-HTML-Tagset-3.04 Some useful data table in parsing HTML p5-Mail-SpamAssassin-3.0.2 A highly efficient mail filter for identifying spam p5-Mail-Tools-1.66 Perl5 modules for dealing with Internet e-mail messages p5-Net-DNS-0.48 Perl5 interface to the DNS resolver, and dynamic updates p5-URI-1.35 Perl5 interface to Uniform Resource Identifier (URI) refere perl-5.8.6_2 Practical Extraction and Report Language The error occured between "spamass-milter", which uses libkse for threads, and spamc, a child process that communicates to spamd. They share a socket file. It appears that a thread spawned a spamc process that hung. Attempting to kill the process for spamass-milter left all threads in "STOP" state. Attempting to kill spamc proc left a <defunct>. At this point I was stuck and (stupidly) tried attaching gdb to spamass-milter, which locked the entire system.
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