dup close log configuable

src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java

@@ -192,6 +192,18 @@ public abstract class DruidAbstractDataSource extends WrapperAdapter implements
                                                                                                                                                        10 * 1000,
                                                                                                                                                        100 * 1000);
 
+    private boolean                                                                          dupCloseLogEnable                         = true;
+
+
+    public boolean isDupCloseLogEnable() {
+        return dupCloseLogEnable;
+    }
+
+    public void setDupCloseLogEnable(boolean dupCloseLogEnable) {
+        this.dupCloseLogEnable = dupCloseLogEnable;
+    }
+    
+
     public Histogram getTransactionHistogram() {
         return transactionHistogram;
     }

src/main/java/com/alibaba/druid/pool/PoolableConnection.java

@@ -56,10 +56,12 @@ public class PoolableConnection implements PooledConnection, Connection {
     protected Connection       conn;
     protected ConnectionHolder holder;
     protected TransactionInfo  transactionInfo;
+    private final boolean      dupCloseLogEnable;
 
     public PoolableConnection(ConnectionHolder holder){
         this.conn = holder.getConnection();
         this.holder = holder;
+        dupCloseLogEnable = holder.getDataSource().isDupCloseLogEnable();
     }
 
     public SQLException handleException(Throwable t) throws SQLException {
@@ -115,7 +117,7 @@ public class PoolableConnection implements PooledConnection, Connection {
     public void close() throws SQLException {
         ConnectionHolder holder = this.holder;
 
-        if (holder == null) {
+        if (holder == null && dupCloseLogEnable) {
             LOG.error("dup close");
             return;
         }

src/test/java/com/alibaba/druid/pool/benckmark/Oracle_Case0.java

@@ -16,9 +16,9 @@
 package com.alibaba.druid.pool.benckmark;
 
 import java.sql.Connection;
+import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.sql.Statement;
 import java.text.NumberFormat;
 
 import javax.sql.DataSource;
@@ -37,7 +37,7 @@ public class Oracle_Case0 extends TestCase {
     private String   user;
     private String   password;
     private String   driverClass;
-    private int      initialSize     = 10;
+    private int      initialSize     = 1;
     private int      minPoolSize     = 1;
     private int      maxPoolSize     = 2;
     private int      maxActive       = 2;
@@ -126,8 +126,8 @@ public class Oracle_Case0 extends TestCase {
         final int COUNT = 1000 * 1;
         for (int i = 0; i < COUNT; ++i) {
             Connection conn = dataSource.getConnection();
-            Statement stmt = conn.createStatement();
-            ResultSet rs = stmt.executeQuery("SELECT 1 FROM DUAL");
+            PreparedStatement stmt = conn.prepareStatement("SELECT 1 FROM DUAL");
+            ResultSet rs = stmt.executeQuery();
             rs.next();
             rs.close();
             stmt.close();