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From: Roland Orre <orre@nada.kth.se>
Subject: Hanging at open-input-pipe now and then
Date: Fri, 06 Feb 2004 12:01:41 +0100	[thread overview]
Message-ID: <1076065301.2804.191.camel@localhost> (raw)

Lately it happens quite often that I get a hanging (in 1.7), but
breakable, when doing somthing like:

(let* ((in0 (open-input-pipe (string-append "zcat " fname)))
       (buf (read-line in0))
       (in (begin
	     (close-pipe in0)
	     (open-input-pipe (string-append "zcat " fname))))
       )

This hanging can occur rather soon after a restart. When it starts to
happen it will happen again after every 2-20 tries. When the hanging
does not start to happen I can do this several tousand times in a row
without problems.

I haven't investigated this very deeply yet, but just an observation.
The guardian pipe-guardian used in ice-9/popen.scm always have two
reachable pointers after gc, despite the pointers can't be reached.

Anyone else having similar problems?

	Best regards
	Roland Orre




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             reply	other threads:[~2004-02-06 11:01 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-02-06 11:01 Roland Orre [this message]
2004-02-14 23:55 ` Hanging at open-input-pipe now and then Ludovic Courtès

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