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https://issues.apache.org/jira/browse/QPID-7994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16224762#comment-16224762
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ASF subversion and git services commented on QPID-7994:
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Commit 319edfe69c42d468fe47e10bc247a34f06f68de3 in qpid-broker-j's branch
refs/heads/master from [~alex.rufous]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-broker-j.git;h=319edfe ]
QPID-7994: [Broker-J] [JMS2.0 support] Add a system test for unsubscibe of
global shared durable subscription
> [Broker-J] [JMS2.0 support] 'null source lookup' ends up in 'amqp:not-found'
> on attaching of unsubscribe links for global durable shared subscriptions
> ------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: QPID-7994
> URL: https://issues.apache.org/jira/browse/QPID-7994
> Project: Qpid
> Issue Type: Bug
> Reporter: Alex Rudyy
>
> As per [QPIDJMS-220|https://issues.apache.org/jira/browse/QPIDJMS-220]
> {quote}
> During unsubscribe, if a ClientID is set on the connection, a link named with
> the subscription name would be used to perform a 'null source lookup' for the
> subscription, as it is already for the existing non-shared durable
> subscriptions (see earlier for behaviour outline). If a ClientID is not set,
> the "|global" suffix will be added as shown previously..
> {quote}
> The current broker behaviour is not compliment with QPIDJMS-220. The broker
> create a new link instead of looking for existing link having name
> {{<subscription-name>|global}} as suggested by QPIDJMS-220. For the new link,
> the local source is null. As result, 'not=found' error is reported.
> The broker should try to find an existing link in the link registry using
> link name only rather than name and a container ID as it does now. If link
> with given name is found, it should be used to recover the source. The broker
> should perform the search by link name only if {{SHARED}} capability is
> requested either on connection or attach itself as suggested by QPIDJMS-220:
> {quote}
> Additionally, while using connections that dont have a ClientID set, i.e
> using global shared susbcriptions, the link will have "shared" and "global"
> desired capabilities added as hints to the server that this is an attempt to
> attach to a 'global' shared subscription of the appropriate name derived from
> the link, aiding the server should no link with this name be known by it for
> the particular client container-id currently in use.
> {quote}
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