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https://issues.apache.org/jira/browse/BOOKKEEPER-50?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089999#comment-13089999
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Benjamin Reed commented on BOOKKEEPER-50:
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xulei is right, we need to make sure we persist the keys at the bookie. we need
to save off the secret in the header of the ledger on the bookie. we reserve 1K
in the header for meta-data, so it is an obvious place to put it. We need to
modify FileInfo to have accessor functions for the key.
> NullPointException at LedgerDescriptor#cmpMasterKey
> ---------------------------------------------------
>
> Key: BOOKKEEPER-50
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-50
> Project: Bookkeeper
> Issue Type: Bug
> Components: bookkeeper-server
> Affects Versions: 3.4.0
> Reporter: xulei
> Attachments: bookkeeper-50.patch
>
>
> the LedgerDescriptor will be created when it is missed in LedgerCache.
> NullPointException will be thrown out in the following case:
> 1. The ledger descriptor is created and cached to LedgerCache because of a
> readEntry operation in bookie. The ledger descriptor was created without
> setting master key (we don't know master key in a read request)
> 2. An addEntry is sent after 1 . since the ledger descriptor has been cached,
> so addEntry will use it to compare master key. then NullPointException is
> thrown out.
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