"mount: File exists" when trying to mount a second NFS4/krb5 shares

[Joachim Selke]

Hi,

I have a strange problem using NFS4 shares with krb5 security flavor.

My server is running Fedora Core 5 (Kernel 2.6.18-1) and offers NFS
shares to clients. My /etc/exports is:

/export             gss/krb5(fsid=0,rw,insecure,no_subtree_check,sync)
/export/home        gss/krb5(rw,nohide,insecure,no_subtree_check,sync)
/export/thi-shared  gss/krb5(rw,nohide,insecure,no_subtree_check,sync)

Both /export/home and /export/thi-shared are mounted via bind.
/etc/fstab contains the following lines:

/home       /export/home       none bind 0 0
/thi-shared /export/thi-shared none bind 0 0

Now I try to mount these shares on some client:
mount -v -t nfs4 -o sec=krb5 MYSERVER:/thi-shared /import/thi-shared

That works fine. I get the following output:

mount: pinging: prog 100003 vers 4 prot tcp port 2049
MYSERVER:/thi-shared on /import/thi-shared type nfs4
(rw,sec=krb5,addr=MYSERVERIP)

But then I try to mount the other share:
mount -v -t nfs4 -o sec=krb5 MYSERVER:/home /import/home

That fails and I get the following output:

mount: pinging: prog 100003 vers 4 prot tcp port 2049
mount: File exists

If I try to mount home first and then thi-shared I get the same problem:
The first command succeeds, the second fails.

Can anybody give me a hint what's going wrong? How can I get more debug
information?

Thanks,
Joachim