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From "Jim Gomes (JIRA)" <>
Subject [jira] Updated: (AMQNET-61) Auto-Acknowledgement Mode always sends unnecessary ACK message
Date Wed, 02 Feb 2011 17:03:35 GMT


Jim Gomes updated AMQNET-61:

    Parent:     (was: AMQNET-68)

> Auto-Acknowledgement Mode always sends unnecessary ACK message
> --------------------------------------------------------------
>                 Key: AMQNET-61
>                 URL:
>             Project: ActiveMQ .Net
>          Issue Type: Bug
>          Components: ActiveMQ, MSMQ
>         Environment: Windows XP SP2
> .NET 2.0
>            Reporter: Jim Gomes
>            Assignee: james strachan
>            Priority: Minor
>         Attachments: IConnection.cs.patch.txt, MessageConsumer.cs.patch.txt, StompWireFormat.cs.patch.txt
> When a MessageConsumer receives a message, it sends a MessageAck even when the acknowledgment
mode is set to AutoAcknowledge.  This results in an error message being sent back to the client
stating that there is no such message to acknowledge.
> According to standard JMS semantics, when AutoAcknowledge mode is used, the client does
not need to (and apparently should not) send back an ACK message.  An ACK message should only
be sent back when the subscription is in ClientAcknowledge or DupsOkAcknowledge mode.  Sending
back unnecessary responses creates unnecessary network traffic and load on a high-speed server.

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