proxy can't support multiple transaction

[koalas1105]

Bug Report

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Which version of ShardingSphere did you use?

3.1.0

Which project did you use? Sharding-JDBC or Sharding-Proxy?

Sharding-Proxy

Expected behavior

			Connection con = getConnection1();
			con.setAutoCommit(false);
			Statement statement = con.createStatement();
			String orderNo = System.currentTimeMillis() + "A";
			String sql = "insert into t_order(order_no,merc_no,merch_order_no,tx_dt,tx_tm,tx_amt) values('" + orderNo + "', 'B123456789012345', '" + orderNo + "', '20181117', '161411', '123.33')";
			statement.executeUpdate(sql);
			con.rollback();

			orderNo = System.currentTimeMillis() + "B";
			sql = "insert into t_order(order_no,merc_no,merch_order_no,tx_dt,tx_tm,tx_amt) values('" + orderNo + "', 'B123456789012345', '" + orderNo + "', '20181117', '161411', '123.33')";
			statement.executeUpdate(sql);


			orderNo = System.currentTimeMillis() + "C";
			sql = "insert into t_order(order_no,merc_no,merch_order_no,tx_dt,tx_tm,tx_amt) values('" + orderNo + "', 'B123456789012345', '" + orderNo + "', '20181117', '161411', '123.33')";
			statement.executeUpdate(sql);
			con.commit();

			ResultSet rs = statement.executeQuery("select * from t_order where order_no ='" + orderNo + "'");
			while( rs.next() ) {
				System.out.println("order_no:" + rs.getString("order_no"));
			}
//			con.commit();
//			sql = "insert into t_order(order_no,merc_no,merch_order_no,tx_dt,tx_tm,tx_amt) values('526431086763446276', 'B123456789012345', '526431083269591046', '20181117', '161411', '123.33')";
//			statement.executeUpdate(sql);
			con.rollback();

			con.close();

Actual behavior

ACTIONS: You can try one of the following: 
1. Make sure you started a transaction for the thread.
2. Make sure you didn't terminate it yet.
3. Increase the transaction timeout to avoid automatic rollback of long transactions;
   check http://www.atomikos.com/Documentation/JtaProperties for how to do this.
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2617)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2778)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2819)
	at com.mysql.jdbc.ConnectionImpl.commit(ConnectionImpl.java:1739)
	at com.alibaba.druid.pool.DruidPooledConnection.commit(DruidPooledConnection.java:752)
	at TestMySql.main(TestMySql.java:32)

Reason analyze (If you can)

Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.

Example codes for reproduce this issue (such as a github link).

[cherrylzhao]

@tonnixu I'm sorry for the lately reply, it seems that you have using a XA transaction in proxy?

[cherrylzhao]

we have fixed this error in current dev branch(4.0.0-RC1-SNAPSHOT).
and I want to tell you XA transaction only support transaction between begin and commit/rollback. it looks like this:

  XATransaction.begin
    statement1.execute("sq1");           -- sq1 and sql2 will use XA transaction
    statement2.execute("sql2");
  XATransaction.commit
     stemet1.execute("sql3");            --  "sql3" will use local auto commit transaction

[cherrylzhao]

fixed at #1805 #1808