[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: 20020213: [Fwd: 20020207: missing products]
- Subject: Re: 20020213: [Fwd: 20020207: missing products]
- Date: Wed, 13 Mar 2002 15:10:19 -0700
Harry Edmon wrote:
>
> I had to make some changes to /etc/nsswitch.conf - your changes goofed up our
> NFS mounts.
>
Oops. Very sorry about that. We three looked at the fix, and now will
know better.
> I found the DEC Alpha problem. What is happening is occasionally the write on
> line 439 of ulog/ulog.c is returning a -1 with errno of 55 - No buffer space
> available. The program then calls closeulog, which closes the log and sets
> logFd to -1. The following code then does a fork and tries to write to the
> console. I believe the waitpid at the of this code fails when a signal occurs
> in the server before the child finishes (there seems to be a bunch of SIGCONTs
> going on), and nothing ever goes back and does a wait - thus the zombie
> processes.
>
> There are probably a number of ways to fix what happens when the write error
> occurs - but I leave that to you. It also may be possible to increase the
> buffer space on the Alpha for the logging calls.
>
Thanks very much for tracking this down! This will be very helpful.
> But, I am now tracking down a different bug in the LDM in Linux - I am trying
> to
> parallel the setup on air on a Linux box. When I start up the LDM it tries to
> get data from all the same sources. Two of the sources (which are schools)
> don't currently have this machine listed as authorized to get data from them.
> But instead of just waiting and trying again the processes asking for the
> feeds
> are using large amounts of CPU time. I will let you know if I find this bug.
>
Again, I really appreciate your effort in uncovering and tracking bugs.
I'm disappointed to report that the nsswitch.conf change does not appear
to have fixed the problem. At first I was excited because it did not
occur for 8 hours after the change, but after that it occured at least 4
times. I guess it's time to move to plan C, as soon as I figure out
what that is...
Anne
> --
> Dr. Harry Edmon E-MAIL: address@hidden
> 206-543-0547 address@hidden
> Dept of Atmospheric Sciences FAX: 206-543-0308
> University of Washington, Box 351640, Seattle, WA 98195-1640
--
***************************************************
Anne Wilson UCAR Unidata Program
address@hidden P.O. Box 3000
Boulder, CO 80307
----------------------------------------------------
Unidata WWW server http://www.unidata.ucar.edu/
****************************************************