YP problem.

[Colm Buckley <colm@tuatha.org>]

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. # colm@tuatha.org colm.buckley@tcd.ie colm@computer.org
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.