diff --git a/src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java b/src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java
index 6cf7cc8e29..1a1c444fb8 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java
@@ -38,7 +38,7 @@ public class MySqlExceptionSorter implements ExceptionSorter {
         }
         
         switch (errorCode) {
-        // Communications Errors
+            // Communications Errors
             case 1040: // ER_CON_COUNT_ERROR
             case 1042: // ER_BAD_HOST_ERROR
             case 1043: // ER_HANDSHAKE_ERROR
@@ -46,21 +46,23 @@ public class MySqlExceptionSorter implements ExceptionSorter {
             case 1081: // ER_IPSOCK_ERROR
             case 1129: // ER_HOST_IS_BLOCKED
             case 1130: // ER_HOST_NOT_PRIVILEGED
-                // Authentication Errors
+            // Authentication Errors
             case 1045: // ER_ACCESS_DENIED_ERROR
-                // Resource errors
+            // Resource errors
             case 1004: // ER_CANT_CREATE_FILE
             case 1005: // ER_CANT_CREATE_TABLE
             case 1015: // ER_CANT_LOCK
             case 1021: // ER_DISK_FULL
             case 1041: // ER_OUT_OF_RESOURCES
-                // Out-of-memory errors
+            // Out-of-memory errors
             case 1037: // ER_OUTOFMEMORY
             case 1038: // ER_OUT_OF_SORTMEMORY
-                // Access denied
+            // Access denied
             case 1142: // ER_TABLEACCESS_DENIED_ERROR
             case 1227: // ER_SPECIFIC_ACCESS_DENIED_ERROR
 
+            case 1023: // ER_ERROR_ON_CLOSE
+
             case 1290: // ER_OPTION_PREVENTS_STATEMENT
                 return true;
             default: