[jira] [Updated] (BOOKKEEPER-50) NullPointException at LedgerDescriptor#cmpMasterKey

["Sijie Guo (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BOOKKEEPER-50?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sijie Guo updated BOOKKEEPER-50:
--------------------------------

    Fix Version/s: 4.0.0
    
> 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
>             Fix For: 4.0.0
>
>         Attachments: BookieReadAfterBookieRestartTest.java, 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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