bug fixed : dup close

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

@@ -512,6 +512,9 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
 
             // exceptionSorter.isExceptionFatal
             if (exceptionSorter != null && exceptionSorter.isExceptionFatal(sqlEx)) {
+                if (pooledConnection.isTraceEnable()) {
+                    activeConnections.remove(pooledConnection);
+                }
                 this.discardConnection(holder.getConnection());
                 pooledConnection.disable();
             }

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

@@ -58,6 +58,7 @@ public class PoolableConnection implements PooledConnection, Connection {
     protected TransactionInfo  transactionInfo;
     private final boolean      dupCloseLogEnable;
     private boolean            traceEnable = false;
+    private boolean            diable      = false;
 
     public PoolableConnection(ConnectionHolder holder){
         this.conn = holder.getConnection();
@@ -126,14 +127,24 @@ public class PoolableConnection implements PooledConnection, Connection {
     }
 
     void disable() {
+        this.traceEnable = false;
         this.holder = null;
         this.transactionInfo = null;
+        this.diable = true;
+    }
+
+    public boolean isDiable() {
+        return diable;
     }
 
     @Override
     public void close() throws SQLException {
         ConnectionHolder holder = this.holder;
 
+        if (this.diable) {
+            return;
+        }
+
         if (holder == null && dupCloseLogEnable) {
             LOG.error("dup close");
             return;