I have seen this recently at our home office. There the server is unfortunately
Redhat
(5 I believe?). I've only seen this crop up recently and am still running Hamm
on the
machine up there which is the NIS client. Each time I see this happen I ssh in
to the
box and then when I run ypcat XXX it works just fine. Quite frustrating. I
think the
problem is simply timeouts rather than ypserv doing something wrong. I don't
think
there's anywhere where the timeouts can be increased though. Hmmm.
Colm Buckley wrote:
> I'm running an up-to-date potato installation on a couple of machines
> here; and I've noticed (for the past week or so), a strange problem with
> NIS/YP (possibly with RPC in general).
>
> The most obvious symptom is that "ypcat passwd" doesn't work (although
> ypmatch does work) - here's some output:
>
> dagda:root ~ (2) # hostname
> dagda
> dagda:root ~ (3) # ypwhich
> dagda
> dagda:root ~ (4) # ypcat passwd
> yp_all: clnt_call: RPC: Timed out
> No such map passwd.byname. Reason: Internal NIS error
> dagda:root ~ (5) # ypmatch colm passwd
> colm:x:1000:100:Colm Buckley:/home/colm:/usr/bin/zsh
>
> The trace from "ypserv -d" for the above gives:
>
> ypproc_all_2_svc(): [From: 134.226.34.16:647]
> domain = "tuatha.cs.tcd.ie"
> map = "passwd.byname"
> connect from 134.226.34.16
> db_open("tuatha.cs.tcd.ie", "passwd.byname")
> ->Returning OK!
> Opening: tuatha.cs.tcd.ie/passwd.byname (0) 8057958
> -> First value returned.
> ypproc_domain("tuatha.cs.tcd.ie") [From: 134.226.34.16:1013]
> connect from 134.226.34.16
> -> Ok.
> ypproc_match(): [From: 134.226.34.16:669]
> domainname = "tuatha.cs.tcd.ie"
> mapname = "passwd.byname"
> keydat = "colm"
> connect from 134.226.34.16
> db_open("tuatha.cs.tcd.ie", "passwd.byname")
> ->Returning OK!
> Opening: tuatha.cs.tcd.ie/passwd.byname (0) 80557d8
> ypdb_close() called
> -> Value = "colm:x:1000:100:Colm Buckley:/home/colm:/usr/bin/zsh"
> ypproc_domain("tuatha.cs.tcd.ie") [From: 134.226.34.16:1013]
>
> So, it looks like ypserv is returning the first value from the passwd
> map, but no others - either ypcat isn't asking for it, or something is
> rotten in the state of ypserv.
>
> Other things which use NIS (possibly RPC in general) seem to be very
> slow - NFS mounts seem to take a lot longer than previously, for
> example. I don't know whether this is due to a failure in NIS, or a
> more fundamental problem with RPC.
>
> Has anyone else seen this? Anyone know of a fix or workaround?
>
> Colm
>
> --
> Colm Buckley B.A. B.F. # [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED]
> Department of Computer Science # +353 87 2469146 # whois cb3765
> Trinity College, Dublin 2, Ireland. # http://www.tuatha.org/~colm/
> No one is listening until you make a mistake.
>
> --
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--
Jens B. Jorgensen
[EMAIL PROTECTED]
