Fault without any reason

I ran 2 nodes cluster for test.
After some time I saw next two lines in console and then DB felt down:

proto: no coders for int
proto: no encoder for Code int [GetProperties]

founded this in ERR.log:
E161206 22:52:19.449944 135 server/admin.go:765 context deadline exceeded
E161206 22:52:19.450199 135 server/admin.go:845 rpc error: code = 13 desc = An internal server error has occurred. Please check your CockroachDB logs for more details.

We’re tracking that message in https://github.com/cockroachdb/cockroach/issues/10484. For now, it’s harmless and you can ignore it.