heal: Set truncate when no more walk entries (#3932)

cmd/admin-handlers_test.go

@@ -26,6 +26,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"net/url"
+	"reflect"
 	"testing"
 	"time"
 
@@ -1451,6 +1452,7 @@ func TestListHealUploadsHandler(t *testing.T) {
 		delimiter    string
 		maxKeys      string
 		statusCode   int
+		expectedResp ListMultipartUploadsResponse
 	}{
 		// 1. Valid params.
 		{
@@ -1460,6 +1462,14 @@ func TestListHealUploadsHandler(t *testing.T) {
 			delimiter:  "/",
 			maxKeys:    "10",
 			statusCode: http.StatusOK,
+			expectedResp: ListMultipartUploadsResponse{
+				XMLName:    xml.Name{Space: "http://s3.amazonaws.com/doc/2006-03-01/", Local: "ListMultipartUploadsResult"},
+				Bucket:     "mybucket",
+				KeyMarker:  "prefix11",
+				Delimiter:  "/",
+				Prefix:     "prefix",
+				MaxUploads: 10,
+			},
 		},
 		// 2. Valid params with empty prefix.
 		{
@@ -1469,6 +1479,14 @@ func TestListHealUploadsHandler(t *testing.T) {
 			delimiter:  "/",
 			maxKeys:    "10",
 			statusCode: http.StatusOK,
+			expectedResp: ListMultipartUploadsResponse{
+				XMLName:    xml.Name{Space: "http://s3.amazonaws.com/doc/2006-03-01/", Local: "ListMultipartUploadsResult"},
+				Bucket:     "mybucket",
+				KeyMarker:  "",
+				Delimiter:  "/",
+				Prefix:     "",
+				MaxUploads: 10,
+			},
 		},
 		// 3. Invalid params with invalid bucket.
 		{
@@ -1536,8 +1554,29 @@ func TestListHealUploadsHandler(t *testing.T) {
 
 		rec := httptest.NewRecorder()
 		adminTestBed.mux.ServeHTTP(rec, req)
+
 		if test.statusCode != rec.Code {
 			t.Errorf("Test %d - Expected HTTP status code %d but received %d", i+1, test.statusCode, rec.Code)
 		}
+
+		// Compare result with the expected one only when we receive 200 OK
+		if rec.Code == http.StatusOK {
+			resp := rec.Result()
+			xmlBytes, err := ioutil.ReadAll(resp.Body)
+			if err != nil {
+				t.Errorf("Test %d: Failed to read response %v", i+1, err)
+			}
+
+			var actualResult ListMultipartUploadsResponse
+			err = xml.Unmarshal(xmlBytes, &actualResult)
+			if err != nil {
+				t.Errorf("Test %d: Failed to unmarshal xml %v", i+1, err)
+			}
+
+			if !reflect.DeepEqual(test.expectedResp, actualResult) {
+				t.Fatalf("Test %d: Unexpected response `%+v`, expected: `%+v`", i+1, test.expectedResp, actualResult)
+			}
+		}
+
 	}
 }

cmd/xl-v1-list-objects-heal.go

@@ -303,6 +303,8 @@ func (xl xlObjects) listMultipartUploadsHeal(bucket, prefix, keyMarker,
 	var walkerDoneCh chan struct{}
 	// Check if we have room left to send more uploads.
 	if maxUploads > 0 {
+		uploadsLeft := maxUploads
+
 		walkerCh, walkerDoneCh = xl.listPool.Release(listParams{
 			bucket:    minioMetaMultipartBucket,
 			recursive: recursive,
@@ -319,10 +321,14 @@ func (xl xlObjects) listMultipartUploadsHeal(bucket, prefix, keyMarker,
 				multipartPrefixPath, multipartMarkerPath,
 				recursive, listDir, isLeaf, walkerDoneCh)
 		}
-		// Collect uploads until maxUploads limit is reached.
+		// Collect uploads until leftUploads limit is reached.
-		for walkResult := range walkerCh {
+		for {
-			// For any error during tree walk we should
+			walkResult, ok := <-walkerCh
-			// return right away.
+			if !ok {
+				truncated = false
+				break
+			}
+			// For any error during tree walk, we should return right away.
 			if walkResult.err != nil {
 				return ListMultipartsInfo{}, walkResult.err
 			}
@@ -334,8 +340,8 @@ func (xl xlObjects) listMultipartUploadsHeal(bucket, prefix, keyMarker,
 				uploads = append(uploads, uploadMetadata{
 					Object: entry,
 				})
-				maxUploads--
+				uploadsLeft--
-				if maxUploads == 0 {
+				if uploadsLeft == 0 {
 					break
 				}
 				continue
@@ -347,20 +353,21 @@ func (xl xlObjects) listMultipartUploadsHeal(bucket, prefix, keyMarker,
 			var end bool
 			uploadIDMarker = ""
 			newUploads, end, err = fetchMultipartUploadIDs(bucket, entry, uploadIDMarker,
-				maxUploads, xl.getLoadBalancedDisks())
+				uploadsLeft, xl.getLoadBalancedDisks())
 			if err != nil {
 				return ListMultipartsInfo{}, err
 			}
 			uploads = append(uploads, newUploads...)
-			maxUploads -= len(newUploads)
+			uploadsLeft -= len(newUploads)
 			if end && walkResult.end {
 				truncated = false
 				break
 			}
-			if maxUploads == 0 {
+			if uploadsLeft == 0 {
 				break
 			}
 		}
+
 	}
 
 	// For all received uploads fill in the multiparts result.