diff --git a/jsonrpc/endpoints_eth.go b/jsonrpc/endpoints_eth.go
index ddf914f6a3..2569e72ede 100644
--- a/jsonrpc/endpoints_eth.go
+++ b/jsonrpc/endpoints_eth.go
@@ -111,6 +111,7 @@ func (e *EthEndpoints) Call(arg *types.TxArgs, blockArg *types.BlockNumberOrHash
 
 		// X Layer LRU
 		if lru_xlayer.GetConfig().Enable {
+			log.Infof("LRU cache is enabled")
 			ret, errValue, ok := getCallResultFromLRU(blockToProcess, sender, tx)
 			if ok {
 				log.Infof("Call result from LRU cache: %v, %v", ret, errValue)
diff --git a/jsonrpc/endpoints_eth_lru_xlayer.go b/jsonrpc/endpoints_eth_lru_xlayer.go
index 87206386e4..48dab1edfe 100644
--- a/jsonrpc/endpoints_eth_lru_xlayer.go
+++ b/jsonrpc/endpoints_eth_lru_xlayer.go
@@ -36,6 +36,7 @@ func getCallResultFromLRU(blockNumber *uint64, sender common.Address, tx *ethtyp
 
 func setCallResultToLRU(blockNumber *uint64, sender common.Address, tx *ethtypes.Transaction, value interface{}, errValue types.Error) {
 	retKey, errKey := getCallKey(blockNumber, sender, tx)
+	log.Infof("setCallResultToLRU retKey: %s, errKey: %s", retKey, errKey)
 	err := lru_xlayer.GetLRU().Set(retKey, value)
 	if err != nil {
 		log.Debugf("Failed to set value to LRU cache call ret: %v", err)