After a recent upgrade to 4.2.1 I found that a netapp filer (actually the simulator since this is on a test network), while joining successfully the domain, after that it showed an "Unable to create NETLOGON pipe STATUS_ACCESS_DENIED" message.
Searching for the issue I found the bug report in the URL with a workaround (setting "allow nt4 crypto=yes") and a patch that solves the problem.
*** Bug 11247 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 11291 ***