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List:       lprng
Subject:    Re: Re: LPRng: LPRng-3.8.27:  strange load problem
From:       <WHarms () bfs ! de>(Walter Harms)
Date:       2004-10-08 8:26:45
Message-ID: vines.sxdD+3xYÎ,A () SZKOM ! BFS ! DE
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Hi patrick,
thats not the the problem.
we have 6 boxes that do the same data processing. we move data via lpr.
occationaly 1 lprngqueue stops working. the problem can be solved
via start/stop lpd. simply jobs dont get processed anymore.
we tried a lot to find the problem but it seems to happen only
if nobody watches.
The daemon still accepts jobs, does not show any odd bahavier other
than stop processsing the queue (no zombies, no lots of worker processes).
It seems related to the systemload but perhaps its only because more jobs arrive.

Last month we had no problems this month more than 3 times. (but all
independent)

We had more problems when the backup (rsync) run but since its
complex to do i will try to reproduce it next week.

regards,
walter


ps: how much would it cost to solve ?
 



- - - - - - - - - - - - - - Original Message - - - - - - - - - - - - - -
From: Patrick Powell <papowell@astart.com>
Subject: Re: LPRng: LPRng-3.8.27:  strange load problem
Date: 10/05/04 19:00

> From owner-lprng@www.lprng.com Thu Sep 30 16:19:20 2004
> Date: Wed, 29 Sep 2004 10:45:01 +0200
> To: <lprng@lprng.com>
> From: <WHarms@bfs.de>(Walter Harms)
> Subject: LPRng: LPRng-3.8.27:  strange load problem
>
> Hi Patrik,
> i have a strange problem when the lpd has some load, sometimes
> (lets say 1:50 change) he suddely stops without any errormessage or other indication whats going on.
>
> I have tried to reproduce the error but failed so far.
>
> are you aware of this problem ?
>
> regards,
> walter
>

When you say 'stop', do you mean it stops accepting jobs OR
it does not process any jobs that are in the queue?

To prevent denial of service attacks, LPRng will not fork more than a 
specified number of 'worker' processes at a time.  It is assumed that
doing so will cause the operating system to be unable to start additional
processes.  This 'high water mark' is controlled by:

# Purpose: maximum number of servers that can be active
#   default max_servers_active=1024  (INTEGER)


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