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https://issues.apache.org/jira/browse/BOOKKEEPER-822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16196741#comment-16196741
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Ivan Kelly commented on BOOKKEEPER-822:
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I think this is already done, but moving over to gh anyhow to verify.
> Make LedgerMetadata Immutable
> -----------------------------
>
> Key: BOOKKEEPER-822
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-822
> Project: Bookkeeper
> Issue Type: Bug
> Reporter: Ivan Kelly
> Assignee: Ivan Kelly
> Labels: iktriage1
>
> Mutable metadata has been a very rich source of bugs. There are multiple
> processing modifying for rebuilding ensembles, closing, fencing, autorecovery
> etc.
> The local metadata should be a mirror of the metadata in zookeeper. So we
> should only modify the local metadata as a whole. The first part of this is
> making it immutable, so that it can only be modified with a builder.
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