skydns: failure to forward request "dns: failed to unpack truncated message"

[mxork]

As far as I can tell, there's no reason for a forwarding server not to write a truncated message back to the client: forwarding.go

The same logic in the stub server does not treat ErrTruncated this way: stub.go

Context:

Kubernetes/kube-dns: a reverse lookup with host against a kube-dns pod fails (the reverse record is not held locally). The same lookup specifying TCP succeeded. Logs show:

I0601 21:44:11.499737       1 logs.go:41] skydns: failure to forward request "dns: failed to unpack truncated message"

At time of failed query.

[mxork]

In case any is curious, kube-dns version: 1.14.10