NFS Hangs ... NFS4ERR_DELAY

[Norman Elton]

Hello,

I wrote last week regarding NFS hangs as we're migrating towards NFS4  
+ Kerberos. I believe I've got all the kerberos issues straightened  
out, but we're experiencing hung connections, both when mounting and  
when doing an "ls" of individual shares.

Here's the dialogue I've observed with tcpdump when mounting a share:

 >>> V4 Null Call
<<< V4 Null Reply
 >>> V4 Null Call
<<< V4 Null Reply
 >>> V4 Null Call, now with GSS Token
<<< V4 Null Reply, again, with GSS information
 >>> V4 Compound Request (PUTROOTFH, GETFH, GETATTR)
<<< V4 Compound Reply (PUTROOTFH=ok, GETFH=ok, GETATTR=nfs4err_delay)

This last transaction goes back and forth a few times, with the  
GETATTR operation consistently returning NFS4ERR_DELAY. Eventually I  
have to kill the mount request.

A little googling indicates that this could be a problem with idmapd.  
I've configured our DNS domain in idmapd.conf, no luck. I've run  
idmapd in debug mode ("-f -vvv") and do not get any output. I'm not  
sure if idmapd is functioning properly or not.

Any ideas?

Thanks!!

Norman Elton