stable libmilter leaks kqueue descriptors?

From: othermark (atkin901_at_yahoo.com)
Date: 07/29/03

  • Next message: Robert Klein: "Re: NForce2 + FreeBSD" 
    To: freebsd-stable@freebsd.org
Date: Tue, 29 Jul 2003 18:36:49 +0000 (UTC)

    A few weeks back I upgraded my mail server to -STABLE from a 4.2-STABLE
    incarnation that had been running for years. Part of recompiling
    everything on the box involved disassociating my use of the
    sendmail port I was using and to use the base sendmail in -STABLE.

    -STABLE builds with libmilter, so I simply recompiled one of my
    milter clients with the milter headers, objs, etc that were produced
    from buildworld. However, now I notice that the client (dccm
    in this case -- www.rhyolite.com/dcc ) slowly uses all the descriptors
    on the box and must be restarted.

    I started logging it's use of descriptors over time via a shell
    script and lsof, and found that it's leaking kqueue descriptors.

    Has anyone:

    1. noticed this problem with other libmilter linked clients that
       you may be running.
    2. have some ideas on how to track down this leakage? I've looked
       at the dccm source and it seems to be using milter correctly
       (as it was working fine with an older version of sendmail), but
       maybe other excellent users have tracked down kqueue leakage
       before.
    3. was a new kqueue enabled libmilter introduced in the 8.x series of
       upgrades of sendmail?

    Here's a log excerpt, notice how the fd's for the sockets stay the
    same, but the kqueue descriptors grow out of hand:

    Wed Jul 16 15:24:09 PDT 2003
    total fd:
          78
    kqueue fd:
          56
    ipv4 fd:
           3
    ps:
    dcc 21265 0.0 2.0 4004 3084 ?? Ss 12:10PM 0:01.25
    /var/dcc/libexec/dccm -l log -t CMN,5,10 -w whiteclnt

    Wed Jul 16 15:41:28 PDT 2003
    total fd:
          78
    kqueue fd:
          56
    ipv4 fd:
           3
    ps:
    dcc 21265 0.0 2.0 4004 3084 ?? Ss 12:10PM 0:01.36
    /var/dcc/libexec/dccm -l log -t CMN,5,10 -w whiteclnt

    Wed Jul 16 16:17:36 PDT 2003
    total fd:
         109
    kqueue fd:
          87
    ipv4 fd:
           3
    ps:
    dcc 21265 0.0 1.9 4004 3072 ?? Ss 12:10PM 0:01.64
    /var/dcc/libexec/dccm -l log -t CMN,5,10 -w whiteclnt

    Wed Jul 16 18:36:17 PDT 2003
    total fd:
         137
    kqueue fd:
         115
    ipv4 fd:
           3
    ps:
    dcc 21265 0.0 2.0 4004 3080 ?? Ss 12:10PM 0:02.34
    /var/dcc/libexec/dccm -l log -t CMN,5,10 -w whiteclnt

    Wed Jul 16 20:36:41 PDT 2003
    total fd:
         165
    kqueue fd:
         143
    ipv4 fd:
           3
    ps:
    dcc 21265 0.0 2.0 4004 3080 ?? Ss 12:10PM 0:02.95
    /var/dcc/libexec/dccm -l log -t CMN,5,10 -w whiteclnt

    Thu Jul 17 01:17:06 PDT 2003
    total fd:
         193
    kqueue fd:
         171
    ipv4 fd:
           3
    ps:
    dcc 21265 0.0 2.0 4004 3084 ?? Ss 12:10PM 0:04.16
    /var/dcc/libexec/dccm -l log -t CMN,5,10 -w whiteclnt 

    ---
Mark
atkin901 at NOSPAM yahoo dot com
(!wired)?(coffee++):(wired);
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  • Next message: Robert Klein: "Re: NForce2 + FreeBSD"