diff --git a/weed/storage/store_ec.go b/weed/storage/store_ec.go
index 1ef18755f..795d138d4 100644
--- a/weed/storage/store_ec.go
+++ b/weed/storage/store_ec.go
@@ -530,6 +530,7 @@ func (s *Store) readLocalEcShardInterval(ecVolume *erasure_coding.EcVolume, shar
 	// Skip a local shard from a different encode run than the caller's index;
 	// treat it as not-local so the read recovers from the correct generation.
 	if ecVolume.EncodeTsNs != 0 && ownerVolume.EncodeTsNs != 0 && ecVolume.EncodeTsNs != ownerVolume.EncodeTsNs {
+		glog.V(1).Infof("skip local ec shard %d.%d from a different encode run: caller EncodeTsNs %d, local %d", ecVolume.VolumeId, shardId, ecVolume.EncodeTsNs, ownerVolume.EncodeTsNs)
 		return fmt.Errorf("shard %d for volume %d: %w", shardId, ecVolume.VolumeId, errShardNotLocal)
 	}