auth api: after a db lookup, always finish the get cycle

diff --git a/pdns/ws-auth.cc b/pdns/ws-auth.cc
index 3f23ca0156f0d8923731abca2d15742c108f8bca..3fc805135e782a85371a39cf2481a65e958e32cf 100644 (file)
--- a/pdns/ws-auth.cc
+++ b/pdns/ws-auth.cc
@@ -2036,6 +2036,11 @@ static void patchZone(UeberBackend& B, HttpRequest* req, HttpResponse* resp) {
             if (qtype.getCode() != rr.qtype.getCode()
               && (exclusiveEntryTypes.count(qtype.getCode()) != 0
                 || exclusiveEntryTypes.count(rr.qtype.getCode()) != 0)) {
+
+              // leave database handle in a consistent state
+              while (di.backend->get(rr))
+                ;
+
               throw ApiException("RRset "+qname.toString()+" IN "+qtype.getName()+": Conflicts with pre-existing RRset");
             }
           }