Fix empty config crash

cassandra/prefix_switch.go

@@ -138,9 +138,12 @@ func GetPrefixSwitchTrieFromCfg(
 	}
 
 	logger.Infof("Loading from cfg: %v", loadedMap)
-
-	tr := trie.New[rune, PrefixSwitchStatus](keysString, vStatus)
-	return &tr, loadedMap, nil
+	if len(keysString) == len(vStatus) && len(keysString) > 0 {
+		tr := trie.New[rune, PrefixSwitchStatus](keysString, vStatus)
+		return &tr, loadedMap, nil
+	} else {
+		return nil, loadedMap, nil
+	}
 }
 
 func NewPrefixSwitcher(config *config.CassandraStoreCfg, cqlStore *CassandraStore) (*PrefixSwitcher, error) {

cassandra/prefix_table_finder.go

@@ -82,9 +82,13 @@ func getTableTrieFromCfg(
 		return nil, nil, fmt.Errorf("prefix cfg duplicate: %v", duplicateKeys)
 	}
 	logger.Infof("Loading from cfg: %v", loadedMap)
-
-	tr := trie.New[rune, string](keysString, vStrStatus)
-	prefixTrie = &tr
+
+	if len(keysString) == len(vStrStatus) && len(keysString) > 0 {
+		tr := trie.New[rune, string](keysString, vStrStatus)
+		prefixTrie = &tr
+	} else {
+		prefixTrie = nil
+	}
 
 	return prefixTrie, loadedMap, nil
 }

config/config.go

@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	Version = "v2.0.2-rc2"
+	Version = "v2.0.2-rc3"
 )
 
 var (