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From "Jim Gomes (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQNET-64) occasional exception in ActiveMQ.Dispatcher.Dequeue() : millisecondsTimeout must be either non-negative and less than or equal to Int32.MaxValue or -1.
Date Mon, 24 Sep 2007 20:20:25 GMT

    [ https://issues.apache.org/activemq/browse/AMQNET-64?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_40174
] 

Jim Gomes commented on AMQNET-64:
---------------------------------

David,
Thanks for adding this issue.  Overall, I think these changes improve this area of the code.
 However, a couple of comments on the second set of changes.  

The first is that you added a semi-colon to the end of the if-statement on line 130.  This
introduced a bug in the code.  You'll want to remove that from your changes.

The second is with the constructor for the TimeSpan object in the Dequeue() function.  I see
what you are attempting to do as stated in the AutoResetEvent.WaitOne() method documentation.
 If the TimeSpan object represents -1 milliseconds, it will wait indefinitely.  However, the
TimeSpan object that is being created is not -1 milliseconds.  It looks to be a TimeSpan of
 -1 100-nanoseconds (or ticks), which may not be the same. This may cause a problem.  I would
suggest changing to the following code:

{code}
public IMessage Dequeue()
{
    // Create a TimeSpan of -1 milliseconds, which will wait indefinitely.
    return Dequeue(TimeSpan.FromMilliseconds(-1));
}
{code}


> occasional exception in ActiveMQ.Dispatcher.Dequeue() : millisecondsTimeout must be either
non-negative and less than or equal to Int32.MaxValue or -1.
> -------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: AMQNET-64
>                 URL: https://issues.apache.org/activemq/browse/AMQNET-64
>             Project: ActiveMQ .Net
>          Issue Type: Bug
>          Components: ActiveMQ Client
>         Environment: .NET 2.0, Windows 2000 Server under VMware, https://svn.apache.org/repos/asf/activemq/activemq-dotnet/trunk
@ 578465
>            Reporter: David Holroyd
>            Assignee: James Strachan
>
> I tried a lightly modified version of the example code from http://activemq.apache.org/nms/nms.html
and find that every few invocations of the test program, I see the following exception, rather
than the normal 'Received message' output:
> {noformat}
> Unhandled Exception: System.ArgumentOutOfRangeException: Number must be either non-negative
and less than or equal to Int32.MaxValue or -1.
> Parameter name: millisecondsTimeout
>    at System.Threading.WaitHandle.WaitOne(Int32 millisecondsTimeout, Boolean exitContext)
>    at ActiveMQ.Dispatcher.Dequeue(TimeSpan timeout)
>    at ActiveMQ.Dispatcher.Dequeue()
>    at ActiveMQ.MessageConsumer.Receive()
>    at Test.Bridge.Main(String[] args)
> {noformat}
> The code in question is,
> {code:title=Bridge.cs}
> namespace Test {
> 	using System;
> 	using NMS;
> 	using ActiveMQ;
> 	public class Bridge {
> 		public static void Main(string[] args) {
> 			IConnectionFactory factory = new ConnectionFactory(new Uri("tcp://192.168.9.162:61616"));
> 			using (IConnection connection = factory.CreateConnection())
> 			{
> 			    Console.WriteLine("Created a connection!");
> 			    
> 			    ISession session = connection.CreateSession();
> 			    
> 			    IDestination destination = session.GetQueue("FOO.BAR");
> 			    Console.WriteLine("Using destination: " + destination);
> 			    
> 			    // lets create a consumer and producer
> 			    IMessageConsumer consumer = session.CreateConsumer(destination);
> 			    
> 			    IMessageProducer producer = session.CreateProducer(destination);
> 			    producer.Persistent = true;
> 			    
> 			    // lets send a message
> 			    ITextMessage request = session.CreateTextMessage("Hello World!");
> 			    request.NMSCorrelationID = "abc";
> 			    request.Properties["NMSXGroupID"] = "cheese";
> 			    request.Properties["myHeader"] = "James";
> 			    
> 			    producer.Send(request);
> 			    
> 			    // lets consume a message
> 			    ITextMessage message = (ITextMessage) consumer.Receive();
> 			    if (message == null)
> 			    {
> 				Console.WriteLine("No message received!");
> 			    }
> 			    else
> 			    {
> 				Console.WriteLine("Received message with ID:   " + message.NMSMessageId);
> 				Console.WriteLine("Received message with text: " + message.Text);
> 			    }
> 			}
> 		}
> 	}
> }
> {code}
> The C# code is talking to ActiveMQ 4.1.1 running on the Linux host (I'm using NMS within
VMware).
> I'll try to nose around the code and work out what's happening, but this is the first
time I've ever worked with C#.

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