diff --git a/common/src/tfe_session_table.cpp b/common/src/tfe_session_table.cpp
index 90eb5af..654e292 100644
--- a/common/src/tfe_session_table.cpp
+++ b/common/src/tfe_session_table.cpp
@@ -3,7 +3,7 @@
 #include "tfe_session_table.h"
 #include <tfe_utils.h>
 
-extern void * g_packet_io_logger;
+extern void *g_packet_io_logger;
 
 struct session_table
 {
@@ -197,7 +197,6 @@ struct session_node *session_table_search_by_id(struct session_table *table, uin
 struct session_node *session_table_search_by_addr(struct session_table *table, const struct addr_tuple4 *session_addr)
 {
     struct session_node *temp = NULL;
-    char *addr_str = addr_tuple4_to_str(session_addr);
     HASH_FIND(hh2, table->root_by_addr, session_addr, sizeof(struct addr_tuple4), temp);
     if (!temp)
     {
@@ -206,16 +205,9 @@ struct session_node *session_table_search_by_addr(struct session_table *table, c
         HASH_FIND(hh2, table->root_by_addr, &reverse_addr, sizeof(struct addr_tuple4), temp);
         if (!temp)
         {
-            TFE_LOG_DEBUG(g_packet_io_logger, "%s: search: key %s not exists", LOG_TAG_STABLE, addr_str);
-            free(addr_str);
-            addr_str = NULL;
             return NULL;
         }
     }
 
-    TFE_LOG_DEBUG(g_packet_io_logger, "%s: search: key %s success", LOG_TAG_STABLE, addr_str);
-    free(addr_str);
-    addr_str = NULL;
-
     return temp;
 }