I'm running qmail under Solaris 7 (aka solaris 2.7). I have a problem: I
have many qmail-smtpd processes on the system which appear to have hung.
Some of them are many days old, as old as Jan 17, 2000. I noticed them
today when I saw that tcpserver's concurrency was quite high, yet there
wasn't that much mail coming in. If I attach a truss to those processes,
I see them "sleeping" on a read call:
# truss -p 12270
read(0, 0x0002A420, 1024) (sleeping...)
^C
#
I would have thought that they would timeout after 1200 seconds. I
searched the archives and Mark Delany mentioned in
http://www.ornl.gov/its/archives/mailing-lists/qmail/1999/02/msg00752.html
that he had seen a similar thing on Solaris 2.6, but there was no
further discussion on a solution. At the moment, the only thing I can do
is to kill off the processes by hand, or worse, reboot. Has anyone else
seen this, and if so, is there a known solution? Is there any Solaris
guru out there, who might know of a kernel parameter that I can tune to
reduce this problem?
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