indexers, utreexobackends: fix flush bugs

blockchain/indexers/utreexobackend.go

@@ -729,7 +729,7 @@ func InitUtreexoState(cfg *UtreexoConfig, chain *blockchain.BlockChain,
 		isFlushNeeded = func() bool {
 			nodesNeedsFlush := nodesDB.IsFlushNeeded()
 			leavesNeedsFlush := cachedLeavesDB.IsFlushNeeded()
-			return nodesNeedsFlush && leavesNeedsFlush
+			return nodesNeedsFlush || leavesNeedsFlush
 		}
 	} else {
 		log.Infof("loading the utreexo state from disk...")

blockchain/internal/utreexobackends/cachedleavesmap.go

@@ -192,6 +192,10 @@ func (ms *CachedLeavesMapSlice) ClearMaps() {
 			delete(ms.maps[i], key)
 		}
 	}
+
+	for key := range ms.overflow {
+		delete(ms.overflow, key)
+	}
 }
 
 // ForEach loops through all the elements in the cachedleaves map slice and calls fn with the key-value pairs.

blockchain/internal/utreexobackends/nodesmap.go

@@ -208,6 +208,10 @@ func (ms *NodesMapSlice) ClearMaps() {
 			delete(ms.maps[i], key)
 		}
 	}
+
+	for key := range ms.overflow {
+		delete(ms.overflow, key)
+	}
 }
 
 // ForEach loops through all the elements in the nodes map slice and calls fn with the key-value pairs.