I have an NFS server A and two NFS clients B an C.

Client B makes a lot of directory structures during the day.
However, sometimes client C does not see the directories that are
created by client B. After a while (up to 20 minutes) they just become

We are using Linux 2.4.24 on the server A, on client B we use Linux
2.4.24 and on client C Linux 2.4.26.

The clients are mounted with: rsize=8192, wsize=8192, noac
The server exports with: root_squash, async

Any idea what might be the problem here?