Log disk not found error just once (#6059)

Modified the LogIf function to log only if the error passed
is not on the ignored errors list.

Currently, only disk not found error is added to the list.
Added a new function in logger package called LogAlwaysIf, 
which will print on any error.

Fixes #5997

cmd/logger/logger.go

@@ -47,6 +47,11 @@ const (
 
 const loggerTimeFormat string = "15:04:05 MST 01/02/2006"
 
+// List of error strings to be ignored by LogIf
+const (
+	diskNotFoundError = "disk not found"
+)
+
 var matchingFuncNames = [...]string{
 	"http.HandlerFunc.ServeHTTP",
 	"cmd.serverMain",
@@ -267,17 +272,36 @@ func getTrace(traceLevel int) []string {
 	return trace
 }
 
-// LogIf prints a detailed error message during
+// LogAlwaysIf prints a detailed error message during
 // the execution of the server.
-func LogIf(ctx context.Context, err error) {
+func LogAlwaysIf(ctx context.Context, err error) {
-	if Disable {
+	if err == nil {
 		return
 	}
 
+	logIf(ctx, err)
+}
+
+// LogIf prints a detailed error message during
+// the execution of the server, if it is not an
+// ignored error.
+func LogIf(ctx context.Context, err error) {
 	if err == nil {
 		return
 	}
 
+	if err.Error() != diskNotFoundError {
+		logIf(ctx, err)
+	}
+}
+
+// logIf prints a detailed error message during
+// the execution of the server.
+func logIf(ctx context.Context, err error) {
+	if Disable {
+		return
+	}
+
 	req := GetReqInfo(ctx)
 
 	if req == nil {

cmd/prepare-storage.go

@@ -36,14 +36,14 @@ var printEndpointError = func() func(Endpoint, error) {
 			m = make(map[string]bool)
 			m[err.Error()] = true
 			printOnce[endpoint] = m
-			logger.LogIf(ctx, err)
+			logger.LogAlwaysIf(ctx, err)
 			return
 		}
 		if m[err.Error()] {
 			return
 		}
 		m[err.Error()] = true
-		logger.LogIf(ctx, err)
+		logger.LogAlwaysIf(ctx, err)
 	}
 }()
 

cmd/xl-v1-bucket.go

@@ -50,7 +50,6 @@ func (xl xlObjects) MakeBucketWithLocation(ctx context.Context, bucket, location
 	// Make a volume entry on all underlying storage disks.
 	for index, disk := range xl.getDisks() {
 		if disk == nil {
-			logger.LogIf(ctx, errDiskNotFound)
 			dErrs[index] = errDiskNotFound
 			continue
 		}
@@ -234,7 +233,6 @@ func (xl xlObjects) DeleteBucket(ctx context.Context, bucket string) error {
 	// Remove a volume entry on all underlying storage disks.
 	for index, disk := range xl.getDisks() {
 		if disk == nil {
-			logger.LogIf(ctx, errDiskNotFound)
 			dErrs[index] = errDiskNotFound
 			continue
 		}

cmd/xl-v1-healing.go

@@ -108,7 +108,6 @@ func healBucket(ctx context.Context, storageDisks []StorageAPI, bucket string, w
 	// Make a volume entry on all underlying storage disks.
 	for index, disk := range storageDisks {
 		if disk == nil {
-			logger.LogIf(ctx, errDiskNotFound)
 			dErrs[index] = errDiskNotFound
 			beforeState[index] = madmin.DriveStateOffline
 			afterState[index] = madmin.DriveStateOffline

cmd/xl-v1-metadata.go

@@ -428,7 +428,6 @@ func writeUniqueXLMetadata(ctx context.Context, disks []StorageAPI, bucket, pref
 	// Start writing `xl.json` to all disks in parallel.
 	for index, disk := range disks {
 		if disk == nil {
-			logger.LogIf(ctx, errDiskNotFound)
 			mErrs[index] = errDiskNotFound
 			continue
 		}
@@ -467,7 +466,6 @@ func writeSameXLMetadata(ctx context.Context, disks []StorageAPI, bucket, prefix
 	// Start writing `xl.json` to all disks in parallel.
 	for index, disk := range disks {
 		if disk == nil {
-			logger.LogIf(ctx, errDiskNotFound)
 			mErrs[index] = errDiskNotFound
 			continue
 		}

cmd/xl-v1-multipart.go

@@ -103,7 +103,6 @@ func commitXLMetadata(ctx context.Context, disks []StorageAPI, srcBucket, srcPre
 	// Rename `xl.json` to all disks in parallel.
 	for index, disk := range disks {
 		if disk == nil {
-			logger.LogIf(ctx, errDiskNotFound)
 			mErrs[index] = errDiskNotFound
 			continue
 		}
@@ -791,7 +790,6 @@ func (xl xlObjects) cleanupUploadedParts(ctx context.Context, uploadIDPath strin
 	// Cleanup uploadID for all disks.
 	for index, disk := range xl.getDisks() {
 		if disk == nil {
-			logger.LogIf(ctx, errDiskNotFound)
 			errs[index] = errDiskNotFound
 			continue
 		}

cmd/xl-v1-object.go

@@ -807,7 +807,6 @@ func (xl xlObjects) deleteObject(ctx context.Context, bucket, object string) err
 
 	for index, disk := range xl.getDisks() {
 		if disk == nil {
-			logger.LogIf(ctx, errDiskNotFound)
 			dErrs[index] = errDiskNotFound
 			continue
 		}