- To: Jeremy Visser <jeremy.visser@xxxxxxxxx>
- Subject: Re: [SLUG] Apps hanging when writing to /dev/log
- From: Tony Sceats <tony.sceats@xxxxxxxxx>
- Date: Wed, 4 Feb 2009 22:15:24 +1100
- Cc: slug@xxxxxxxxxxx
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maybe there's an open write lock on /dev/log that keeps the send() hanging?
On Wed, Feb 4, 2009 at 8:39 PM, Jeremy Visser <jeremy.visser@xxxxxxxxx>wrote:
> On 02/02/2009, at 11:56 AM, Daniel Pittman wrote:
>
>> That should let you see which syscalls were delaying the process, and so
>> narrow it down to a specific set of options...
>>
>
> Did you read my post 30/01/09 7:14PM? It was basically a running commentary
> of it, as I was watching the strace, not just logging it to a file.
>
> The actual syslogd daemon did not appear to be locked up. It didn't even
> hang when I sent a normal HUP to it -- it quits cleanly.
>
> Just the socket communication between apps and /dev/log seems to be hanging
> (though killing syslogd stops the hanging).
>
> As for the actual apps that hang as a result of the dead communication,
> they hang on send(), when writing the log message.
>
> It's strange that they hang on send(). connect('/dev/log'), which is what
> I'd expect them to hang on, returns instantly.
>
> --
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