Fix lint.

src/dbnode/persist/fs/index_claims_manager_test.go

@@ -25,10 +25,10 @@ import (
 	"testing"
 	"time"
 
+	"github.com/stretchr/testify/require"
+
 	"github.com/m3db/m3/src/dbnode/namespace"
 	"github.com/m3db/m3/src/x/ident"
-
-	"github.com/stretchr/testify/require"
 )
 
 func TestIndexClaimsManagerConcurrentClaims(t *testing.T) {

src/dbnode/persist/fs/index_read_segments.go

@@ -22,6 +22,7 @@ package fs
 
 import (
 	"errors"
+	"fmt"
 	"io"
 
 	"github.com/m3db/m3/src/m3ninx/index/segment"
@@ -120,7 +121,7 @@ func ReadIndexSegments(
 	// Note: need to validate after all segment file sets read.
 	if validate {
 		if err = reader.Validate(); err != nil {
-			return ReadIndexSegmentsResult{}, err
+			return ReadIndexSegmentsResult{}, fmt.Errorf("failed to validate index segments: %w", err)
 		}
 	}
 

src/dbnode/storage/bootstrap/bootstrapper/persist.go

@@ -169,7 +169,7 @@ func persistBootstrapIndexSegment(
 		blockStart,
 	)
 	if err != nil {
-		return result.IndexBlock{}, err
+		return result.IndexBlock{}, fmt.Errorf("failed to claim next index volume index: %w", err)
 	}
 
 	preparedPersist, err := flush.PrepareIndex(persist.IndexPrepareOptions{

src/dbnode/storage/index.go

@@ -1136,7 +1136,7 @@ func (i *nsIndex) flushBlock(
 		indexBlock.StartTime(),
 	)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to claim next index volume index: %w", err)
 	}
 
 	preparedPersist, err := flush.PrepareIndex(persist.IndexPrepareOptions{