Catch context error when getting bucket index

Signed-off-by: Wilbert Guo <[email protected]>

Author: wilguo

pkg/storage/tsdb/bucketindex/loader.go

@@ -92,6 +92,11 @@ func NewLoader(cfg LoaderConfig, bucketClient objstore.Bucket, cfgProvider bucke
 // GetIndex returns the bucket index for the given user. It returns the in-memory cached
 // index if available, or load it from the bucket otherwise.
 func (l *Loader) GetIndex(ctx context.Context, userID string) (*Index, Status, error) {
+	if ctx.Err() != nil {
+		level.Warn(l.logger).Log("msg", "received context error when attempting to load bucket index", "err", ctx.Err())
+		return nil, UnknownStatus, ctx.Err()
+	}
+
 	l.indexesMx.RLock()
 	if entry := l.indexes[userID]; entry != nil {
 		idx := entry.index