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From "Alan Conway (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-4401) New HA - bindings for QMF exchanges not replicated
Date Tue, 13 Nov 2012 23:26:12 GMT

    [ https://issues.apache.org/jira/browse/QPID-4401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496667#comment-13496667
] 

Alan Conway commented on QPID-4401:
-----------------------------------

There is a problem with this, for example if I bind a queue Q to receive broker events. On
the backup, Q will receive double events: from the replicating subscription to the primary
and events generated locally in the backup broker. That can cause the backup to generate "invalid
position" errors and shut down.
                
> New HA - bindings for QMF exchanges not replicated
> --------------------------------------------------
>
>                 Key: QPID-4401
>                 URL: https://issues.apache.org/jira/browse/QPID-4401
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Clustering
>            Reporter: Andy Goldstein
>            Assignee: Alan Conway
>            Priority: Minor
>
> If I manually create a binding from qmf.default.topic to a queue, that binding is not
replicated to backup brokers.  When a failover occurs, the binding is gone.
> My use case, which is for a test harness, is that I have several active-passive broker
clusters.  Each active broker binds all queue-related events to a queue.  A separate, standalone
broker used to gather statistics uses a queue route to pull the queue-related QMF statistics
from each cluster.  In effect, I'm aggregating all QMF stats from all clusters into a single
stats broker.  When I initiate a failover for one of my clusters, I lose the binding for queue-related
events, so I no longer get stats from that cluster.

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