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https://issues.apache.org/activemq/browse/AMQNET-61?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_40133
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semog edited comment on AMQNET-61 at 9/12/07 5:01 PM:
----------------------------------------------------------
Added a new {{AutoClientAcknowledge}} mode that will put the consumer into
client acknowledgment mode and will send the ACK message automatically. This
is the same action that {{AutoAcknowledge}} would perform prior to this fix. I
then changed the {{AutoAcknowledge}} mode to *not* send an ACK message back to
the server.
Note: the patch for MessageConsumer.cs was generated after applying the patches
for [AMQNET-55].
Note: the patch for StompWireFormat.cs was generated after applying the patches
for [AMQNET-53], [AMQNET-56], and [AMQNET-59].
was (Author: semog):
Added a new {{AutoClientAcknowledge}} mode that will put the consumer into
client acknowledgment mode and will send the ACK message automatically. This
is the same action that {{AutoAcknowledge}} would perform prior to this fix. I
then changed the {{AutoAcknowledge}} mode to *not* send an ACK message back to
the server.
> Auto-Acknowledgement Mode always sends unnecessary ACK message
> --------------------------------------------------------------
>
> Key: AMQNET-61
> URL: https://issues.apache.org/activemq/browse/AMQNET-61
> Project: ActiveMQ .Net
> Issue Type: Bug
> Components: ActiveMQ Client, MSMQ, Stomp
> 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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