new file mode 100644
--- /dev/null
+++ b/tests/BugConcurrent_sequences.java
@@ -0,0 +1,177 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0.  If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Copyright 1997 - July 2008 CWI, August 2008 - 2016 MonetDB B.V.
+ */
+
+import java.sql.*;
+
+public class BugConcurrent_sequences {
+	public static void main(String[] args) throws Exception {
+		Connection con1 = null, con2 = null;
+		Statement stmt1 = null, stmt2 = null;
+		ResultSet rs1 = null, rs2 = null;
+		Class.forName("nl.cwi.monetdb.jdbc.MonetDriver");
+		con1 = DriverManager.getConnection(args[0]);
+		con2 = DriverManager.getConnection(args[0]);
+		stmt1 = con1.createStatement();
+		stmt2 = con2.createStatement();
+
+		// >> true: auto commit should be on by default
+		System.out.println("0. true\t" + con1.getAutoCommit());
+		System.out.println("0. true\t" + con2.getAutoCommit());
+
+		// create a table
+		try {
+			System.out.print("1. create table t1 using client 1... ");
+			stmt1.executeUpdate("CREATE TABLE t1 ( id serial, who varchar(12) )");
+			System.out.println("passed :)");
+		} catch (SQLException e) {
+			// this means we failed (that sux)
+			System.out.println("FAILED 1 :( " + e.getMessage());
+			System.out.println("ABORTING TEST!!!");
+			con1.close();
+			con2.close();
+			System.exit(-1);
+		}
+
+		// test the insertion of values with concurrent clients
+		try {
+			System.out.print("2. insert into t1 using client 1 and 2... ");
+			stmt1.executeUpdate("INSERT INTO t1(who) VALUES('client1')");
+			System.out.println("client 1 passed :)");
+			con2.setAutoCommit(false);
+			stmt2.executeUpdate("INSERT INTO t1(who) VALUES('client2')");
+			System.out.println("transaction on client 2 :)");
+			stmt1.executeUpdate("INSERT INTO t1(who) VALUES('client1')");
+			System.out.println("client 1 passed :)");
+			try {
+				con2.commit();
+				System.out.println("transaction client 2 PASSED :(");
+				System.exit(-1);
+			} catch (SQLException e) {
+				System.out.println("transaction client 2 failed :)");
+			}
+			con2.setAutoCommit(true);
+			stmt2.executeUpdate("INSERT INTO t1(who) VALUES('client2')");
+			System.out.println("passed :)");
+			System.out.println("2.1. check table status with client 1...");
+			rs1 = stmt1.executeQuery("SELECT * FROM t1");
+			while (rs1.next())
+				System.out.println(rs1.getInt("id") + ", " +
+						rs1.getString("who"));
+			System.out.println("passed :)");
+			System.out.println("2.2. check table status with client 2...");
+			rs2 = stmt2.executeQuery("SELECT * FROM t1");
+			while (rs2.next())
+				System.out.println(rs2.getInt("id") + ", " +
+						rs2.getString("who"));
+			System.out.println("passed :)");
+		} catch (SQLException e) {
+			// this means we failed (table not there perhaps?)
+			System.out.println("FAILED 2 :( " + e.getMessage());
+			System.out.println("ABORTING TEST!!!");
+			if (rs1 != null) rs1.close();
+			if (rs2 != null) rs2.close();
+			con1.close();
+			con2.close();
+			System.exit(-1);
+		}
+
+		// drop the table (not dropping the sequence) from client 1
+		try {
+			System.out.print("3.1. drop table t1 using client 1... ");
+			stmt1.executeUpdate("DROP TABLE t1");
+			System.out.println("passed :)");
+			System.out.print("3.1. recreate t1 using client 1... ");
+			stmt1.executeUpdate("CREATE TABLE t1 ( id serial, who varchar(12) )");
+			System.out.println("passed :)");
+		} catch (SQLException e) {
+			// this means we failed (table not there perhaps?)
+			System.out.println("FAILED 3 :( " + e.getMessage());
+			System.out.println("ABORTING TEST!!!");
+			if (rs1 != null) rs1.close();
+			if (rs2 != null) rs2.close();
+			con1.close();
+			con2.close();
+			System.exit(-1);
+		}
+
+		// re-establish connection
+		try {
+			System.out.print("x. Reconnecting client 1 and 2... ");
+			con1.close();
+			con2.close();
+			con1 = DriverManager.getConnection(args[0]);
+			con2 = DriverManager.getConnection(args[0]);
+			stmt1 = con1.createStatement();
+			stmt2 = con2.createStatement();
+			System.out.println("passed :)");
+		} catch (SQLException e) {
+			// this means we failed (table not there perhaps?)
+			System.out.println("FAILED x :( " + e.getMessage());
+			System.out.println("ABORTING TEST!!!");
+			if (rs1 != null) rs1.close();
+			if (rs2 != null) rs2.close();
+			con1.close();
+			con2.close();
+			System.exit(-1);
+		}
+
+		// insert and print, should get 1,2
+		try {
+			System.out.println("4. insert into t1 using client 1 and 2...");
+			stmt1.executeUpdate("INSERT INTO t1(who) VALUES('client1')");
+			System.out.println("passed :)");
+			con2.setAutoCommit(false);
+			stmt2.executeUpdate("INSERT INTO t1(who) VALUES('client2')");
+			con2.commit();
+			con2.setAutoCommit(true);
+			System.out.println("passed :)");
+			System.out.println("4.1. check table status with client 1...");
+			rs1 = stmt1.executeQuery("SELECT * FROM t1 ORDER BY who");
+			for (int cntr = 1; rs1.next(); cntr++) {
+				int id = rs1.getInt("id");
+				System.out.println(id + ", " +
+						rs1.getString("who"));
+				if (id != cntr)
+					throw new SQLException("expected " + cntr + ", got " + id);
+			}
+			System.out.println("passed :)");
+			System.out.println("4.2. check table status with client 2...");
+			rs2 = stmt2.executeQuery("SELECT * FROM t1 ORDER BY who");
+			for (int cntr = 1; rs2.next(); cntr++) {
+				int id = rs2.getInt("id");
+				System.out.println(id + ", " +
+						rs2.getString("who"));
+				if (id != cntr)
+					throw new SQLException("expected " + cntr + ", got " + id);
+			}
+			System.out.println("passed :)");
+		} catch (SQLException e) {
+			// this means we failed (table not there perhaps?)
+			System.out.println("FAILED 4 :( " + e.getMessage());
+			System.out.println("ABORTING TEST!!!");
+			if (rs1 != null) rs1.close();
+			if (rs2 != null) rs2.close();
+			con1.close();
+			con2.close();
+			System.exit(-1);
+		}
+
+		if (rs1 != null) rs1.close();
+		if (rs2 != null) rs2.close();
+
+		// cleanup
+		try {
+			stmt1.executeUpdate("DROP TABLE t1");
+		} catch (SQLException e) {
+			System.out.println("FAILED to clean up! :( " + e.getMessage());
+		}
+
+		con1.close();
+		con2.close();
+	}
+}