[AMQ-7044] NPE when browsing Messages

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 5.15.4
• Component/s: Broker
• Assignee: Unassigned
• Reporter: Andreas Schwarz
• Created: 30/Aug/18 15:16
• Updated: 30/Aug/18 15:16

Description

Hi,

we are using the HTTP connector of activeMQ. When browsing messages we can observe NullPointerExceptions.

The exception occurs because XStream uses reflection to unmarshall objects. The exception can be reproduced with following test

  @Test
  public void testNPE() throws IOException {
    ActiveMQTextMessage message = new ActiveMQTextMessage();

    WireFormat wireFormat = new XStreamWireFormat();

    ByteSequence marshalled = wireFormat.marshal(message);
    Object unmarshalled = wireFormat.unmarshal(marshalled);
    ActiveMQTextMessage message2 = (ActiveMQTextMessage) unmarshalled;
    message2.canProcessAsExpired();
  }