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From "Amichai Rothman (JIRA)" <>
Subject [jira] [Updated] (DOSGI-176) zookeeper discovery sending multiple duplicate endpoint notifications
Date Mon, 22 Apr 2013 09:23:16 GMT


Amichai Rothman updated DOSGI-176:

    Attachment: fix_duplicate_endpoint_notifications.diff

this patch is on top of the DOSGI-172 patch for convenience (no conflict if they will be applied
in order). I can rebase it from trunk if necessary.
> zookeeper discovery sending multiple duplicate endpoint notifications
> ---------------------------------------------------------------------
>                 Key: DOSGI-176
>                 URL:
>             Project: CXF Distributed OSGi
>          Issue Type: Bug
>          Components: Discovery
>    Affects Versions: 1.5
>            Reporter: Amichai Rothman
>         Attachments: fix_duplicate_endpoint_notifications.diff
> To my understanding of the current behavior, the InterfaceMonitorManager creates a ZooKeeper
watcher (InterfaceMonitor) per scope. The InterfaceMonitor however monitors ZK nodes according
to the objectClass (ignoring scope). When a ZK node change is detected, the IMs watching that
node all trigger IMM's event handler. But instead of sending out the EndpointListener events
corresponding to the scope for which each IM was created, it loops through all of the EndpointListener
requested scopes and notifies the first matching one. This effectively causes multiple events
to be triggered for the same scope (instead of one per IM scope), and possibly others to be

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