diff --git a/api.go b/api.go
index f462830ff..28860e894 100644
--- a/api.go
+++ b/api.go
@@ -1767,9 +1767,11 @@ func (api *API) TranslateIndexIDs(ctx context.Context, indexName string, ids []u
 }
 
 // TranslateKeys handles a TranslateKeyRequest.
-func (api *API) TranslateKeys(ctx context.Context, r io.Reader, writable bool) (_ []byte, err error) {
+// ErrTranslatingKeyNotFound error will be swallowed here, so the empty response will be returned.
+func (api *API) TranslateKeys(ctx context.Context, r io.Reader) (_ []byte, err error) {
 	var req TranslateKeysRequest
-	if buf, err := ioutil.ReadAll(r); err != nil {
+	buf, err := ioutil.ReadAll(r)
+	if err != nil {
 		return nil, NewBadRequestError(errors.Wrap(err, "read translate keys request error"))
 	} else if err := api.Serializer.Unmarshal(buf, &req); err != nil {
 		return nil, NewBadRequestError(errors.Wrap(err, "unmarshal translate keys request error"))
@@ -1778,25 +1780,25 @@ func (api *API) TranslateKeys(ctx context.Context, r io.Reader, writable bool) (
 	// Lookup store for either index or field and translate keys.
 	var ids []uint64
 	if req.Field == "" {
-		if ids, err = api.cluster.translateIndexKeys(ctx, req.Index, req.Keys, writable); err != nil {
-			return nil, err
-		}
+		ids, err = api.cluster.translateIndexKeys(ctx, req.Index, req.Keys, !req.NotWritable)
 	} else {
-		if field := api.holder.Field(req.Index, req.Field); field == nil {
+		field := api.holder.Field(req.Index, req.Field)
+		if field == nil {
 			return nil, newNotFoundError(ErrFieldNotFound, req.Field)
-		} else if fi := field.ForeignIndex(); fi != "" {
-			ids, err = api.cluster.translateIndexKeys(ctx, fi, req.Keys, writable)
-			if err != nil {
-				return nil, err
-			}
-		} else if ids, err = api.cluster.translateFieldKeys(ctx, field, req.Keys, writable); err != nil {
-			return nil, errors.Wrapf(err, "translating field keys")
 		}
+
+		if fi := field.ForeignIndex(); fi != "" {
+			ids, err = api.cluster.translateIndexKeys(ctx, fi, req.Keys, !req.NotWritable)
+		} else {
+			ids, err = api.cluster.translateFieldKeys(ctx, field, req.Keys, !req.NotWritable)
+		}
+	}
+	if err != nil && errors.Cause(err) != ErrTranslatingKeyNotFound {
+		return nil, errors.WithMessage(err, "translating keys")
 	}
 
 	// Encode response.
-	buf, err := api.Serializer.Marshal(&TranslateKeysResponse{IDs: ids})
-	if err != nil {
+	if buf, err = api.Serializer.Marshal(&TranslateKeysResponse{IDs: ids}); err != nil {
 		return nil, errors.Wrap(err, "translate keys response encoding error")
 	}
 	return buf, nil
diff --git a/boltdb/translate.go b/boltdb/translate.go
index 55c837eac..1e593a245 100644
--- a/boltdb/translate.go
+++ b/boltdb/translate.go
@@ -171,21 +171,22 @@ func (s *TranslateStore) Size() int64 {
 }
 
 // TranslateKey converts a string key to an integer ID.
-// If key does not have an associated id then one is created.
+// If key does not have an associated id then one is created, unless writable is false,
+// then the function will return the error pilosa.ErrTranslatingKeyNotFound.
 func (s *TranslateStore) TranslateKey(key string, writable bool) (uint64, error) {
 	ids, err := s.translateKeys([]string{key}, writable)
 	if err != nil {
 		return 0, err
 	}
 	if len(ids) == 0 {
-		// this should not happen
 		return 0, ErrTranslateKeyNotFound
 	}
 	return ids[0], nil
 }
 
 // TranslateKeys converts a slice of string keys to a slice of integer IDs.
-// If a key does not have an associated id then one is created.
+// If a key does not have an associated id then one is created, unless writable is false,
+// then the function will return the error pilosa.ErrTranslatingKeyNotFound.
 func (s *TranslateStore) TranslateKeys(keys []string, writable bool) ([]uint64, error) {
 	return s.translateKeys(keys, writable)
 }
diff --git a/client.go b/client.go
index a07167b67..42ec51ba0 100644
--- a/client.go
+++ b/client.go
@@ -88,7 +88,9 @@ type InternalClient interface {
 // InternalQueryClient is the internal interface for querying a node.
 type InternalQueryClient interface {
 	QueryNode(ctx context.Context, uri *URI, index string, queryRequest *QueryRequest) (*QueryResponse, error)
-	TranslateKeysNode(ctx context.Context, uri *URI, index, field string, keys []string) ([]uint64, error)
+
+	// Trasnlate keys on the particular node. The parameter writable informs TranslateStore if we can generate a new ID if any of keys does not exist.
+	TranslateKeysNode(ctx context.Context, uri *URI, index, field string, keys []string, writable bool) ([]uint64, error)
 	TranslateIDsNode(ctx context.Context, uri *URI, index, field string, id []uint64) ([]string, error)
 }
 
@@ -98,7 +100,7 @@ func (n *nopInternalQueryClient) QueryNode(ctx context.Context, uri *URI, index
 	return nil, nil
 }
 
-func (n nopInternalQueryClient) TranslateKeysNode(ctx context.Context, uri *URI, index, field string, keys []string) ([]uint64, error) {
+func (n nopInternalQueryClient) TranslateKeysNode(ctx context.Context, uri *URI, index, field string, keys []string, writable bool) ([]uint64, error) {
 	return nil, nil
 }
 
@@ -145,7 +147,7 @@ func (n nopInternalClient) Query(ctx context.Context, index string, queryRequest
 func (n nopInternalClient) QueryNode(ctx context.Context, uri *URI, index string, queryRequest *QueryRequest) (*QueryResponse, error) {
 	return nil, nil
 }
-func (n nopInternalClient) TranslateKeysNode(ctx context.Context, uri *URI, index, field string, keys []string) ([]uint64, error) {
+func (n nopInternalClient) TranslateKeysNode(ctx context.Context, uri *URI, index, field string, keys []string, writable bool) ([]uint64, error) {
 	return nil, nil
 }
 func (n nopInternalClient) TranslateIDsNode(ctx context.Context, uri *URI, index, field string, ids []uint64) ([]string, error) {
diff --git a/cluster.go b/cluster.go
index 61a2babc7..9e2f504e2 100644
--- a/cluster.go
+++ b/cluster.go
@@ -2346,7 +2346,7 @@ func (c *cluster) translateFieldKey(ctx context.Context, field *Field, key strin
 	if err != nil {
 		return 0, err
 	} else if len(ids) == 0 {
-		return 0, errors.New("translating key on coordinator returned empty set")
+		return 0, nil
 	}
 	return ids[0], nil
 }
@@ -2363,11 +2363,12 @@ func (c *cluster) translateFieldKeys(ctx context.Context, field *Field, keys []s
 	// to the coordinator.
 	if errors.Cause(err) == ErrTranslateStoreReadOnly {
 		coordinatorNode := c.coordinatorNode()
-		if ids, err := c.InternalClient.TranslateKeysNode(ctx, &coordinatorNode.URI, field.Index(), field.Name(), keys); err != nil {
-			return ids, errors.Wrap(err, "translating keys on coordinator")
-		} else {
+
+		ids, err := c.InternalClient.TranslateKeysNode(ctx, &coordinatorNode.URI, field.Index(), field.Name(), keys, writable)
+		if err == nil {
 			return ids, nil
 		}
+		return ids, errors.Wrap(err, "translating keys on coordinator")
 	}
 	return ids, err
 }
@@ -2428,7 +2429,7 @@ func (c *cluster) translateIndexKeySet(ctx context.Context, indexName string, ke
 				}
 			} else {
 				nodes := c.partitionNodes(partitionID)
-				if ids, err = c.InternalClient.TranslateKeysNode(ctx, &nodes[0].URI, indexName, "", keys); err != nil {
+				if ids, err = c.InternalClient.TranslateKeysNode(ctx, &nodes[0].URI, indexName, "", keys, writable); err != nil {
 					return err
 				}
 			}
diff --git a/encoding/proto/proto.go b/encoding/proto/proto.go
index ac4b56e07..309bb136f 100644
--- a/encoding/proto/proto.go
+++ b/encoding/proto/proto.go
@@ -853,9 +853,10 @@ func (s Serializer) encodeRecalculateCaches(*pilosa.RecalculateCaches) *internal
 
 func (s Serializer) encodeTranslateKeysRequest(request *pilosa.TranslateKeysRequest) *internal.TranslateKeysRequest {
 	return &internal.TranslateKeysRequest{
-		Index: request.Index,
-		Field: request.Field,
-		Keys:  request.Keys,
+		Index:       request.Index,
+		Field:       request.Field,
+		Keys:        request.Keys,
+		NotWritable: request.NotWritable,
 	}
 }
 
@@ -1298,6 +1299,7 @@ func (s Serializer) decodeTranslateKeysRequest(pb *internal.TranslateKeysRequest
 	m.Index = pb.Index
 	m.Field = pb.Field
 	m.Keys = pb.Keys
+	m.NotWritable = pb.NotWritable
 }
 
 func (s Serializer) decodeTranslateKeysResponse(pb *internal.TranslateKeysResponse, m *pilosa.TranslateKeysResponse) {
diff --git a/handler.go b/handler.go
index 495641255..7b49e8500 100644
--- a/handler.go
+++ b/handler.go
@@ -283,6 +283,9 @@ type TranslateKeysRequest struct {
 	Index string
 	Field string
 	Keys  []string
+
+	// it's a awkward name, just to keep backward compatibility with go-pilosa and idk.
+	NotWritable bool
 }
 
 // TranslateKeysResponse is the structured response of a key
diff --git a/http/client.go b/http/client.go
index c99d8cdb0..5f4e25b8a 100644
--- a/http/client.go
+++ b/http/client.go
@@ -1140,8 +1140,9 @@ func (c *InternalClient) SendMessage(ctx context.Context, uri *pilosa.URI, msg [
 	return errors.Wrap(err, "draining SendMessage response body")
 }
 
-// TranslateKeysNode sends a key translation request to a specific node.
-func (c *InternalClient) TranslateKeysNode(ctx context.Context, uri *pilosa.URI, index, field string, keys []string) ([]uint64, error) {
+// TranslateKeysNode function is mainly called to translate keys from coordinator node.
+// If coordinator node returns 404 error the function wraps it with pilosa.ErrTranslatingKeyNotFound.
+func (c *InternalClient) TranslateKeysNode(ctx context.Context, uri *pilosa.URI, index, field string, keys []string, writable bool) ([]uint64, error) {
 	span, ctx := tracing.StartSpanFromContext(ctx, "TranslateKeysNode")
 	defer span.Finish()
 
@@ -1150,9 +1151,10 @@ func (c *InternalClient) TranslateKeysNode(ctx context.Context, uri *pilosa.URI,
 	}
 
 	buf, err := c.serializer.Marshal(&pilosa.TranslateKeysRequest{
-		Index: index,
-		Field: field,
-		Keys:  keys,
+		Index:       index,
+		Field:       field,
+		Keys:        keys,
+		NotWritable: !writable,
 	})
 	if err != nil {
 		return nil, errors.Wrap(err, "marshaling TranslateKeysRequest")
@@ -1174,6 +1176,9 @@ func (c *InternalClient) TranslateKeysNode(ctx context.Context, uri *pilosa.URI,
 	// Execute request against the host.
 	resp, err := c.executeRequest(req.WithContext(ctx))
 	if err != nil {
+		if resp != nil && resp.StatusCode == http.StatusNotFound {
+			return nil, errors.Wrap(pilosa.ErrTranslatingKeyNotFound, err.Error())
+		}
 		return nil, err
 	}
 	defer resp.Body.Close()
diff --git a/http/handler.go b/http/handler.go
index a0470139d..c1020c941 100644
--- a/http/handler.go
+++ b/http/handler.go
@@ -2432,17 +2432,22 @@ func (h *Handler) handlePostTranslateKeys(w http.ResponseWriter, r *http.Request
 		return
 	}
 
-	buf, err := h.api.TranslateKeys(r.Context(), r.Body, true)
-	if err != nil {
-		http.Error(w, fmt.Sprintf("translate keys: %v", err), http.StatusInternalServerError)
-		return
-	}
+	buf, err := h.api.TranslateKeys(r.Context(), r.Body)
+	switch errors.Cause(err) {
+	case nil:
+		// Write response.
+		if _, err = w.Write(buf); err != nil {
+			h.logger.Printf("writing translate keys response: %v", err)
+		}
 
-	// Write response.
-	_, err = w.Write(buf)
-	if err != nil {
-		h.logger.Printf("writing translate keys response: %v", err)
-		return
+	case pilosa.ErrTranslatingKeyNotFound:
+		http.Error(w, fmt.Sprintf("translate keys: %v", err), http.StatusNotFound)
+
+	case pilosa.ErrTranslateStoreReadOnly:
+		http.Error(w, fmt.Sprintf("translate keys: %v", err), http.StatusPreconditionFailed)
+
+	default:
+		http.Error(w, fmt.Sprintf("translate keys: %v", err), http.StatusInternalServerError)
 	}
 }
 
diff --git a/internal/public.pb.go b/internal/public.pb.go
index 219625518..36ede10fa 100644
--- a/internal/public.pb.go
+++ b/internal/public.pb.go
@@ -2116,6 +2116,7 @@ type TranslateKeysRequest struct {
 	Index                string   `protobuf:"bytes,1,opt,name=Index,proto3" json:"Index,omitempty"`
 	Field                string   `protobuf:"bytes,2,opt,name=Field,proto3" json:"Field,omitempty"`
 	Keys                 []string `protobuf:"bytes,3,rep,name=Keys,proto3" json:"Keys,omitempty"`
+	NotWritable          bool     `protobuf:"varint,4,opt,name=NotWritable,proto3" json:"NotWritable,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -2175,6 +2176,13 @@ func (m *TranslateKeysRequest) GetKeys() []string {
 	return nil
 }
 
+func (m *TranslateKeysRequest) GetNotWritable() bool {
+	if m != nil {
+		return m.NotWritable
+	}
+	return false
+}
+
 type TranslateKeysResponse struct {
 	IDs                  []uint64 `protobuf:"varint,3,rep,packed,name=IDs,proto3" json:"IDs,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
@@ -2611,110 +2619,111 @@ func init() {
 func init() { proto.RegisterFile("public.proto", fileDescriptor_413a91106d7bcce8) }
 
 var fileDescriptor_413a91106d7bcce8 = []byte{
-	// 1648 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x58, 0xcd, 0x6e, 0xdb, 0xc6,
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-	0xfa, 0x0c, 0xb9, 0xf4, 0x11, 0xfa, 0x1c, 0xbd, 0xb4, 0xc7, 0x1e, 0x0b, 0xf4, 0x52, 0xa4, 0x8f,
-	0x91, 0x1e, 0x8a, 0x99, 0xe5, 0x6a, 0x49, 0x8a, 0x76, 0x8c, 0xa0, 0xb7, 0x9d, 0x8f, 0x9d, 0x9d,
-	0xf9, 0xcd, 0xec, 0xec, 0x90, 0xd0, 0x1c, 0x4f, 0x8f, 0x03, 0xbf, 0xbf, 0x39, 0x8e, 0xc2, 0x38,
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+	0x6d, 0x70, 0x93, 0x45, 0xf5, 0x2e, 0xc6, 0x71, 0xaa, 0x82, 0xc9, 0x28, 0xd6, 0x83, 0xef, 0x0e,
+	0x2f, 0x87, 0xd1, 0x7c, 0x24, 0x78, 0xbc, 0x90, 0xbb, 0xa9, 0x39, 0xf3, 0x22, 0x9b, 0xfd, 0x10,
+	0x9b, 0x1b, 0xb1, 0x54, 0x6b, 0xaa, 0x93, 0x62, 0x81, 0xcb, 0xf6, 0xa0, 0x7d, 0x38, 0x3e, 0x17,
+	0xa3, 0x91, 0x18, 0xf5, 0x83, 0x34, 0x70, 0x1b, 0x14, 0x77, 0xe1, 0xc1, 0xcf, 0xa9, 0x78, 0x9f,
+	0x2c, 0x58, 0xcf, 0xa2, 0x9f, 0x4d, 0xe3, 0xc9, 0x4c, 0x60, 0x8a, 0x0f, 0x93, 0x44, 0xa5, 0xf8,
+	0x30, 0x49, 0xd8, 0x13, 0xa8, 0x73, 0x31, 0x9b, 0x47, 0xa9, 0xaa, 0x92, 0x7b, 0xda, 0xa2, 0xda,
+	0x3b, 0x8f, 0x52, 0xae, 0xb4, 0xd8, 0x2f, 0x60, 0x23, 0x57, 0x87, 0xea, 0x59, 0xf8, 0x9e, 0xde,
+	0x97, 0x93, 0xf3, 0x82, 0xba, 0xf7, 0xc5, 0x81, 0x96, 0x61, 0x79, 0x59, 0x64, 0x88, 0xcf, 0x7a,
+	0x56, 0x64, 0x8f, 0x68, 0xee, 0xba, 0x66, 0xea, 0xc1, 0x9e, 0xd4, 0x06, 0xeb, 0x24, 0x2b, 0x4b,
+	0xeb, 0x44, 0x37, 0x42, 0xfb, 0xa6, 0x46, 0x88, 0x53, 0xdc, 0x87, 0x60, 0x72, 0x21, 0x46, 0x54,
+	0x96, 0x0d, 0xae, 0x48, 0xb6, 0xab, 0xbb, 0x02, 0xe5, 0x31, 0xd7, 0x6b, 0x94, 0x84, 0xeb, 0xce,
+	0x21, 0xbb, 0x1c, 0x4e, 0x06, 0x75, 0x59, 0x2f, 0x92, 0x62, 0x2f, 0xa0, 0xa5, 0xdb, 0xd7, 0x2c,
+	0x4b, 0x51, 0x47, 0x9b, 0xd2, 0x42, 0x6e, 0x2a, 0xb2, 0x57, 0xc5, 0x11, 0xcd, 0x6d, 0x92, 0x17,
+	0x6e, 0x2e, 0x72, 0x43, 0xce, 0x8b, 0x23, 0xdd, 0x9e, 0x31, 0x33, 0xba, 0x40, 0x9b, 0xef, 0xea,
+	0xcd, 0x4b, 0x11, 0x37, 0x26, 0xcb, 0x67, 0xe6, 0x5b, 0xe2, 0xb6, 0x68, 0x4f, 0x27, 0x8f, 0x9c,
+	0x94, 0x71, 0xf3, 0xcd, 0xd9, 0x33, 0x1e, 0x32, 0xb7, 0x5d, 0x3c, 0x68, 0x29, 0xe2, 0xc6, 0x73,
+	0xe7, 0x97, 0xcc, 0x77, 0xee, 0x3a, 0x6d, 0x2d, 0x1f, 0xde, 0xa4, 0x0a, 0x2f, 0x99, 0x0a, 0x5f,
+	0x15, 0x27, 0x01, 0x77, 0xa3, 0x08, 0x54, 0x5e, 0xce, 0x0b, 0xfa, 0xde, 0xdf, 0x2a, 0xb0, 0xee,
+	0x8f, 0xa7, 0x71, 0x92, 0x1a, 0x2d, 0xc1, 0x9f, 0x8c, 0xc4, 0xa5, 0x6a, 0x09, 0x44, 0x94, 0xbf,
+	0x9a, 0xd4, 0x9a, 0xb1, 0x35, 0x50, 0x2b, 0x70, 0xb8, 0x24, 0x8c, 0x72, 0x70, 0x72, 0xe5, 0xb0,
+	0x05, 0x4d, 0x59, 0xfb, 0x28, 0xaa, 0x92, 0x48, 0x33, 0xe4, 0x07, 0xc0, 0x82, 0x06, 0xc7, 0x3a,
+	0x8d, 0xa2, 0x8a, 0xc4, 0x36, 0x28, 0xd5, 0x48, 0xd8, 0x20, 0xa1, 0xc1, 0x41, 0xf9, 0x69, 0x38,
+	0x16, 0xb3, 0x34, 0x18, 0x4f, 0xb1, 0xaf, 0xd8, 0x3d, 0x9b, 0x1b, 0x1c, 0x6c, 0x29, 0x14, 0xc4,
+	0xeb, 0x44, 0x04, 0xa9, 0x18, 0xed, 0xa7, 0x54, 0x4e, 0x36, 0x2f, 0x70, 0x51, 0x8f, 0xc2, 0xd2,
+	0x7a, 0x20, 0xf5, 0xf2, 0x5c, 0x7a, 0x16, 0x23, 0x11, 0x24, 0x54, 0x24, 0x0d, 0x2e, 0x09, 0xef,
+	0x9f, 0x15, 0x60, 0x12, 0x49, 0x39, 0xf8, 0xfd, 0xdf, 0xe0, 0xbc, 0x19, 0xb6, 0x3c, 0x38, 0xf5,
+	0x15, 0x70, 0xee, 0x2f, 0xc7, 0x55, 0x09, 0x4c, 0x46, 0x61, 0x2f, 0xd7, 0x2f, 0x89, 0x44, 0xd5,
+	0xe2, 0x26, 0x8b, 0x79, 0xd0, 0x36, 0x9e, 0x31, 0xbc, 0x83, 0x68, 0x3b, 0xc7, 0x2b, 0x81, 0x16,
+	0x6e, 0x09, 0x6d, 0xeb, 0x66, 0x68, 0xdb, 0x26, 0xb4, 0x9f, 0x2c, 0x68, 0xef, 0xa7, 0xf1, 0x38,
+	0x1c, 0x72, 0x31, 0x8c, 0x93, 0xd1, 0xf5, 0xa0, 0x4a, 0xf8, 0x2a, 0x26, 0x7c, 0xbb, 0x60, 0xfb,
+	0x1f, 0x93, 0xac, 0x15, 0x6e, 0x19, 0x83, 0xd6, 0x4a, 0xae, 0x38, 0x2a, 0xb2, 0xc7, 0x50, 0xf1,
+	0x13, 0xaa, 0xdc, 0x5c, 0x13, 0xcf, 0x5d, 0x12, 0x5e, 0xf1, 0x13, 0xef, 0x27, 0xd0, 0x91, 0x4e,
+	0x29, 0x51, 0xf6, 0xa8, 0x74, 0xa0, 0x7a, 0x98, 0x24, 0xb1, 0x7a, 0x56, 0x24, 0xe1, 0x5d, 0x42,
+	0xe7, 0x34, 0x09, 0x26, 0xb3, 0x28, 0x48, 0x05, 0x26, 0xe6, 0x5b, 0xea, 0xa3, 0xec, 0xeb, 0xba,
+	0x0b, 0xad, 0x93, 0x38, 0x7d, 0x9f, 0x84, 0x29, 0xdd, 0x7f, 0xd9, 0xc9, 0x4d, 0x96, 0xf7, 0x23,
+	0xb8, 0x57, 0x38, 0x59, 0xbf, 0x7e, 0x58, 0x52, 0xb6, 0xfe, 0x8a, 0x1d, 0xc0, 0xdd, 0xa5, 0xaa,
+	0xdf, 0xff, 0x26, 0x1f, 0x57, 0x8d, 0xfe, 0xd8, 0x88, 0x9c, 0x8c, 0x66, 0xc7, 0x97, 0x44, 0xe3,
+	0x1d, 0x80, 0x9b, 0xa1, 0x29, 0x3f, 0xfe, 0x33, 0x0f, 0xce, 0x42, 0xb1, 0xb8, 0xee, 0xfb, 0x88,
+	0x5e, 0xff, 0x0a, 0xfd, 0x32, 0xa0, 0xb5, 0xf7, 0x5f, 0x0b, 0x3a, 0x65, 0x46, 0x74, 0x71, 0x59,
+	0x46, 0x71, 0xb1, 0x97, 0x50, 0xfd, 0x18, 0x8a, 0x85, 0x7a, 0xef, 0xbd, 0x95, 0x94, 0xaf, 0x78,
+	0xc2, 0xe5, 0x06, 0xbc, 0x5a, 0xfb, 0xc3, 0x34, 0x8c, 0x27, 0x6a, 0xb8, 0x97, 0x14, 0x9e, 0x73,
+	0x10, 0xc5, 0xc3, 0xdf, 0xcb, 0xcf, 0x56, 0x2e, 0x89, 0x92, 0xab, 0x52, 0xbd, 0xe5, 0x55, 0xa9,
+	0x95, 0x5e, 0x95, 0xfb, 0x50, 0xeb, 0x87, 0x89, 0x18, 0xa6, 0xd9, 0x80, 0x94, 0x51, 0xde, 0x5f,
+	0x2d, 0x85, 0xa1, 0x31, 0x98, 0x7d, 0x35, 0x93, 0xfa, 0xe2, 0xd8, 0xea, 0xe2, 0xb8, 0x72, 0xba,
+	0xd4, 0x43, 0xb4, 0x22, 0x71, 0xa2, 0xc5, 0x25, 0xfd, 0xcb, 0x70, 0x28, 0x7b, 0x4b, 0xfa, 0x2b,
+	0xdd, 0x6a, 0x15, 0x84, 0x5a, 0x19, 0x08, 0x07, 0x9b, 0x7f, 0xff, 0xbc, 0x6d, 0xfd, 0xe3, 0xf3,
+	0xb6, 0xf5, 0xef, 0xcf, 0xdb, 0xd6, 0x9f, 0xff, 0xb3, 0xbd, 0x76, 0x5e, 0xa3, 0x7f, 0x51, 0x3f,
+	0xfd, 0x5f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xf9, 0x65, 0xe6, 0x0c, 0x9b, 0x12, 0x00, 0x00,
 }
 
 func (m *Row) Marshal() (dAtA []byte, err error) {
@@ -4663,6 +4672,16 @@ func (m *TranslateKeysRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i -= len(m.XXX_unrecognized)
 		copy(dAtA[i:], m.XXX_unrecognized)
 	}
+	if m.NotWritable {
+		i--
+		if m.NotWritable {
+			dAtA[i] = 1
+		} else {
+			dAtA[i] = 0
+		}
+		i--
+		dAtA[i] = 0x20
+	}
 	if len(m.Keys) > 0 {
 		for iNdEx := len(m.Keys) - 1; iNdEx >= 0; iNdEx-- {
 			i -= len(m.Keys[iNdEx])
@@ -5946,6 +5965,9 @@ func (m *TranslateKeysRequest) Size() (n int) {
 			n += 1 + l + sovPublic(uint64(l))
 		}
 	}
+	if m.NotWritable {
+		n += 2
+	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -11369,6 +11391,26 @@ func (m *TranslateKeysRequest) Unmarshal(dAtA []byte) error {
 			}
 			m.Keys = append(m.Keys, string(dAtA[iNdEx:postIndex]))
 			iNdEx = postIndex
+		case 4:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field NotWritable", wireType)
+			}
+			var v int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPublic
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.NotWritable = bool(v != 0)
 		default:
 			iNdEx = preIndex
 			skippy, err := skipPublic(dAtA[iNdEx:])
diff --git a/internal/public.proto b/internal/public.proto
index 4a4bf71c5..c7080a8da 100644
--- a/internal/public.proto
+++ b/internal/public.proto
@@ -175,7 +175,7 @@ message ImportRequest {
 	repeated int64 Timestamps = 6;
 	int64 IndexCreatedAt = 9;
 	int64 FieldCreatedAt = 10;
-	bool Clear = 11;	
+	bool Clear = 11;
 }
 
 message ImportValueRequest {
@@ -207,6 +207,7 @@ message TranslateKeysRequest {
 	string Index = 1;
 	string Field = 2;
 	repeated string Keys = 3;
+	bool NotWritable = 4;
 }
 
 message TranslateKeysResponse {
diff --git a/server/config_test.go b/server/config_test.go
index 593551463..c8ef422a4 100644
--- a/server/config_test.go
+++ b/server/config_test.go
@@ -48,12 +48,7 @@ func TestDuration(t *testing.T) {
 		t.Fatalf("Unexpected marshalled value %v", v)
 	}
 
-	err := d.UnmarshalText([]byte("5"))
-	if err.Error() != "time: missing unit in duration 5" {
-		t.Fatalf("expected time: missing unit in duration: %s", err)
-	}
-
-	err = d.UnmarshalText([]byte("3m2s"))
+	err := d.UnmarshalText([]byte("3m2s"))
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
diff --git a/translator_test.go b/translator_test.go
index be90f9ba9..f38ea5706 100644
--- a/translator_test.go
+++ b/translator_test.go
@@ -290,12 +290,138 @@ func TestTranslation_Reset(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
-		if _, err := node0.API.TranslateKeys(ctx, bytes.NewReader(reqBody), true); err != nil {
+		if _, err := node0.API.TranslateKeys(ctx, bytes.NewReader(reqBody)); err != nil {
 			t.Fatal(err)
 		}
 	})
 }
 
+func TestTranslation_KeyNotFound(t *testing.T) {
+	c := test.MustRunCluster(t, 4,
+		[]server.CommandOption{
+			server.OptCommandServerOptions(
+				pilosa.OptServerIsCoordinator(true),
+				pilosa.OptServerNodeID("node0"),
+				pilosa.OptServerOpenTranslateStore(boltdb.OpenTranslateStore),
+				pilosa.OptServerOpenTranslateReader(http.GetOpenTranslateReaderFunc(nil)),
+			)},
+		[]server.CommandOption{
+			server.OptCommandServerOptions(
+				pilosa.OptServerIsCoordinator(false),
+				pilosa.OptServerNodeID("node1"),
+				pilosa.OptServerOpenTranslateStore(boltdb.OpenTranslateStore),
+				pilosa.OptServerOpenTranslateReader(http.GetOpenTranslateReaderFunc(nil)),
+			)},
+		[]server.CommandOption{
+			server.OptCommandServerOptions(
+				pilosa.OptServerIsCoordinator(false),
+				pilosa.OptServerNodeID("node2"),
+				pilosa.OptServerOpenTranslateStore(boltdb.OpenTranslateStore),
+				pilosa.OptServerOpenTranslateReader(http.GetOpenTranslateReaderFunc(nil)),
+			)},
+		[]server.CommandOption{
+			server.OptCommandServerOptions(
+				pilosa.OptServerIsCoordinator(false),
+				pilosa.OptServerNodeID("node3"),
+				pilosa.OptServerOpenTranslateStore(boltdb.OpenTranslateStore),
+				pilosa.OptServerOpenTranslateReader(http.GetOpenTranslateReaderFunc(nil)),
+			)},
+	)
+	defer c.Close()
+
+	node0 := c.GetNode(0)
+	node1 := c.GetNode(1)
+	node2 := c.GetNode(2)
+	node3 := c.GetNode(3)
+
+	ctx := context.Background()
+	idx, fld := "i", "f"
+	// Create an index with keys.
+	if _, err := node0.API.CreateIndex(ctx, idx, pilosa.IndexOptions{Keys: true}); err != nil {
+		t.Fatal(err)
+	}
+	// Create an index with keys.
+	if _, err := node0.API.CreateField(ctx, idx, fld, pilosa.OptFieldKeys()); err != nil {
+		t.Fatal(err)
+	}
+
+	// write a new key and get id
+	req, err := node0.API.Serializer.Marshal(&pilosa.TranslateKeysRequest{
+		Index:       idx,
+		Field:       fld,
+		Keys:        []string{"k1"},
+		NotWritable: false,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if buf, err := node0.API.TranslateKeys(ctx, bytes.NewReader(req)); err != nil {
+		t.Fatal(err)
+	} else {
+		var resp pilosa.TranslateKeysResponse
+		if err = node0.API.Serializer.Unmarshal(buf, &resp); err != nil {
+			t.Fatal(err)
+		}
+		id0 := resp.IDs[0]
+
+		// read non-existing key
+		req, err = node3.API.Serializer.Marshal(&pilosa.TranslateKeysRequest{
+			Index:       idx,
+			Field:       fld,
+			Keys:        []string{"k2"},
+			NotWritable: true,
+		})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if buf, err = node3.API.TranslateKeys(ctx, bytes.NewReader(req)); err != nil {
+			t.Fatal(err)
+		}
+		if err = node3.API.Serializer.Unmarshal(buf, &resp); err != nil {
+			t.Fatal(err)
+		} else if resp.IDs != nil {
+			t.Fatalf("TranslateKeys(%+v): expected: nil, got: %d", req, resp)
+		}
+
+		req, err = node2.API.Serializer.Marshal(&pilosa.TranslateKeysRequest{
+			Index:       idx,
+			Keys:        []string{"k2"},
+			NotWritable: true,
+		})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if buf, err = node2.API.TranslateKeys(ctx, bytes.NewReader(req)); err != nil {
+			t.Fatal(err)
+		}
+		if err = node2.API.Serializer.Unmarshal(buf, &resp); err != nil {
+			t.Fatal(err)
+		} else if resp.IDs != nil {
+			t.Fatalf("TranslateKeys(%+v): expected: nil, got: %d", req, resp)
+		}
+
+		req, err = node1.API.Serializer.Marshal(&pilosa.TranslateKeysRequest{
+			Index:       idx,
+			Field:       fld,
+			Keys:        []string{"k2"},
+			NotWritable: false,
+		})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if buf, err = node0.API.TranslateKeys(ctx, bytes.NewReader(req)); err != nil {
+			t.Fatal(err)
+		}
+		if err = node0.API.Serializer.Unmarshal(buf, &resp); err != nil {
+			t.Fatal(err)
+		}
+		if resp.IDs[0] != id0+1 {
+			t.Fatalf("TranslateKeys(%+v): expected: %d, got: %d", req, id0+1, resp.IDs[0])
+		}
+	}
+}
+
 func TestInMemTranslateStore_ReadKey(t *testing.T) {
 	s := pilosa.NewInMemTranslateStore("IDX", "FLD", 0, pilosa.DefaultPartitionN)