java.lang.OutOfMemoryError: Java heap space when creating 200 connections with AMQP protocol

 15:15:51,553 | WARN  | 0.0.1:38971@5672 | Transport                        | 131 - org.apache.activemq.activemq-osgi - 5.9.0.redhat-610379 | Transport Connection to: tcp://127.0.0.1:38971 failed: java.io.IOException: Unexpected error occured: java.lang.OutOfMemoryError: Java heap space

@Test
	public void simpleConnectionTest() throws JMSException, InterruptedException {
		Connection[] connections = new Connection[CON_NUM];
		for (int i = 0; i < CON_NUM; i++) {
			connections[i] = conFactory.createConnection();
			connections[i].start();

		}
		Thread.sleep(500);
		for (int i = 0; i < CON_NUM; i++) {
			connections[i].close();
		}
	}