Merge pull request #1172 from wenshao/master

discard mysql streaming resultSet close error connection

src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java

@@ -68,6 +68,11 @@ public class MySqlExceptionSorter implements ExceptionSorter {
 
         String message = e.getMessage();
         if (message != null && message.length() > 0) {
+            if (message.startsWith("Streaming result set com.mysql.jdbc.RowDataDynamic")
+                    && message.endsWith("is still active. No statements may be issued when any streaming result sets are open and in use on a given connection. Ensure that you have called .close() on any active streaming result sets before attempting more queries.")) {
+                return true;
+            }
+            
             final String errorText = message.toUpperCase();
 
             if ((errorCode == 0 && (errorText.contains("COMMUNICATIONS LINK FAILURE")) //
@@ -78,15 +83,6 @@ public class MySqlExceptionSorter implements ExceptionSorter {
             }
         }
         
-        StackTraceElement[] stackTrace = e.getStackTrace();
-        for (int i = 0; i < stackTrace.length; ++i) {
-            StackTraceElement element = stackTrace[i];
-            if ("com.mysql.jdbc.RowDataDynamic".equals(element.getClassName()) //
-                    && "close".equals(element.getMethodName())
-                    ) {
-                return true;
-            }
-        }
         
         return false;
     }