[jira] [Resolved] (OAK-4089) The standby store shouldn't start the observation subsystem

["Francesco Mari (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OAK-4089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Francesco Mari resolved OAK-4089.
---------------------------------
       Resolution: Fixed
    Fix Version/s:     (was: 1.6)
                   1.5.0

Fixed in r1733913.

> The standby store shouldn't start the observation subsystem
> -----------------------------------------------------------
>
>                 Key: OAK-4089
>                 URL: https://issues.apache.org/jira/browse/OAK-4089
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: tarmk-standby
>            Reporter: Francesco Mari
>            Assignee: Francesco Mari
>             Fix For: 1.5.0
>
>
> The current implementation of {{SegmentNodeStore}} unconditionally instantiates a {{ChangeDispatcher}} referencing the root node of the repository at the time of instantiation.
> When this occurs in the context of the standby store, the {{ChangeDispatcher}} is never notified for changes in the repository content, and the initial repository root is permanently referenced by the {{ChangeDispatcher}}. This prevents many segments from being correctly cleaned up from the standby store.
> It would be more appropriate not to instantiate the observation subsystem at all in the context of the standby store, thus preventing spurious references to {{SegmentId}} instances to float in memory.



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