remove spurious logging for object not found (#15842)

cmd/bitrot-streaming.go

@@ -24,6 +24,7 @@ import (
 	"fmt"
 	"hash"
 	"io"
+	"strings"
 	"sync"
 
 	xhttp "github.com/minio/minio/internal/http"
@@ -146,16 +147,28 @@ func (b *streamingBitrotReader) ReadAt(buf []byte, offset int64) (int, error) {
 		// Can never happen unless there are programmer bugs
 		return 0, errUnexpected
 	}
+	ignoredErrs := []error{
+		errDiskNotFound,
+	}
+	if strings.HasPrefix(b.volume, minioMetaBucket) {
+		ignoredErrs = append(ignoredErrs,
+			errFileNotFound,
+			errVolumeNotFound,
+			errFileVersionNotFound,
+		)
+	}
 	if b.rc == nil {
 		// For the first ReadAt() call we need to open the stream for reading.
 		b.currOffset = offset
 		streamOffset := (offset/b.shardSize)*int64(b.h.Size()) + offset
 		if len(b.data) == 0 && b.tillOffset != streamOffset {
 			b.rc, err = b.disk.ReadFileStream(context.TODO(), b.volume, b.filePath, streamOffset, b.tillOffset-streamOffset)
-			if err != nil && err != errDiskNotFound {
-				logger.LogIf(GlobalContext,
-					fmt.Errorf("Reading erasure shards at (%s: %s/%s) returned '%w', will attempt to reconstruct if we have quorum",
-						b.disk, b.volume, b.filePath, err))
+			if err != nil {
+				if !IsErr(err, ignoredErrs...) {
+					logger.LogIf(GlobalContext,
+						fmt.Errorf("Reading erasure shards at (%s: %s/%s) returned '%w', will attempt to reconstruct if we have quorum",
+							b.disk, b.volume, b.filePath, err))
+				}
 			}
 		} else {
 			b.rc = io.NewSectionReader(bytes.NewReader(b.data), streamOffset, b.tillOffset-streamOffset)