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https://issues.apache.org/jira/browse/BOOKKEEPER-852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14616223#comment-14616223
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Sijie Guo commented on BOOKKEEPER-852:
--------------------------------------

I think a cleaner solution is to have a listener on ledger storage on ledger 
deletions. the ledger handle & bookie could register a listener on ledger 
storage, once the ledger is removed from ledger storage, release the ledger 
descriptor and the master key object.

> Release LedgerDescriptor and master-key objects when not used anymore
> ---------------------------------------------------------------------
>
>                 Key: BOOKKEEPER-852
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-852
>             Project: Bookkeeper
>          Issue Type: Bug
>    Affects Versions: 4.3.0
>            Reporter: Matteo Merli
>            Assignee: Matteo Merli
>             Fix For: 4.4.0
>
>         Attachments: 
> 0001-BOOKKEEPER-852-Release-LedgerDescriptor-and-master-k.patch
>
>
> Maps with ledger descriptors and master-keys are not cleaned after a ledger 
> gets deleted.



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