NFS mount hangs

[Byron Myers]

I have a HP-UX 10.20 NFS Version 2 client that is NFS mounting a remote file system, NFS version 3, on HP-UX 11.0 64-bit via automounter. The file system shows mounted on the NFS client in the typical /tmp_mnt directory tree. Whenever I try to cd to the directory, the command hangs, I do a "cntrl C", and after a while the command returns. If I try to manually unmount the file system on the client, I get a "Device Busy" message. A "bdf" command also hangs when it gets to this NFS automounted filesystem. I can manually mount the remote file system to another directory with no problems. What's going on? Any ideas on how to fix this without rebooting?

[Berlene Herren]

The most common problems with lockd hangs are seen when a user has a home directory mounted via NFS and is using the ksh, or when the user's mail directory is mounted via NFS (/var/mail). The root cause is that ksh and mail try to use NFS file locking calls that are not responded to by the lockd on the NFS server. Specifically, ksh tries to lock $HOME/.sh_history, and /bin/mail or /usr/bin/mail try to lock /var/mail/$LOGNAME .

Berlene

[Byron Myers]

This NFS exported file system just contains data and sub directories. No home directories reside on it. My gut feeling is that automounter is the culprit, but I don't know how to fix it.