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https://issues.apache.org/jira/browse/QPID-8571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17925498#comment-17925498
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ASF subversion and git services commented on QPID-8571:
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Commit c2d67baa9ec81c89b873ec009a6190fe4d9b5367 in qpid-broker-j's branch
refs/heads/main from Tomas Vavricka
[ https://gitbox.apache.org/repos/asf?p=qpid-broker-j.git;h=c2d67baa9e ]
QPID-8571: Aligning with Broker-J code standards
> Non-unique consumer tags created for AMPQ 0-9-1
> -----------------------------------------------
>
> Key: QPID-8571
> URL: https://issues.apache.org/jira/browse/QPID-8571
> Project: Qpid
> Issue Type: Bug
> Components: Broker-J
> Affects Versions: qpid-java-broker-8.0.2
> Reporter: Thorsten Meinl
> Assignee: Robert Godfrey
> Priority: Major
> Fix For: qpid-java-broker-9.2.1
>
>
> The AMQP 0-9-1 specification states that the broker creates a unique consumer
> tag upon {{consume}} when the client provides an empty consumer tag. The tags
> are unique per channel.
> However, Qpid creates non-unique tags when consumers target different queues.
> In our case two consumers created via the same channel for two different
> queues both have the same auto-generated tag {_}sgen_1{_}. This becomes an
> issue during auto-recovery using the RabbitMQ Java client. It has an internal
> map with consumer tags as keys that is used during auto-recovery. Now, if two
> consumers get the same tag from the broker the second consumer will override
> the first consumer and thus will not get restored.
> Looking at the management console it seems that internally the consumer tags
> are unique, e.g. _0|1|sgen_1_ but the reply to {{consume}} sent to the client
> only contains {_}sgen_1{_}.
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