[jira] [Resolved] (CURATOR-164) curator-x-discovery: unregisterService is not guaranteed to remove the service, due to reconnectListener concurrency issue

["Jordan Zimmerman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CURATOR-164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jordan Zimmerman resolved CURATOR-164.
--------------------------------------
    Resolution: Fixed

> curator-x-discovery: unregisterService is not guaranteed to remove the service, due to reconnectListener concurrency issue
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CURATOR-164
>                 URL: https://issues.apache.org/jira/browse/CURATOR-164
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Framework
>    Affects Versions: 2.7.0
>            Reporter: Rasmus Berg Palm
>            Assignee: Jordan Zimmerman
>            Priority: Critical
>             Fix For: 2.8.0
>
>
> In ServiceDiscoveryImpl:
> When unregistering a service, the reconnect listener might fire while deleting the path.
> This can cause a condition where the delete finishes successfully, the service is removed from services, and then the reRegisterServices completes successfully and the service is added back in ZK and in services, end result being that the service was not removed, even though unregisterService did not throw any exceptions. 
> Essentially the use of the internal 'services' cache makes for a nightmare of concurrency issues. I put this as critical as the library it's really not usable IMO.



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