[jira] [Updated] (BOOKKEEPER-198) replaying entries of deleted ledgers would exhaust ledger cache.

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

     [ https://issues.apache.org/jira/browse/BOOKKEEPER-198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sijie Guo updated BOOKKEEPER-198:
---------------------------------

    Attachment: BK-198.patch

quite simple a patch. it just returns the failed to be used clean page back to ledger cache.
                
> replaying entries of deleted ledgers would exhaust ledger cache.
> ----------------------------------------------------------------
>
>                 Key: BOOKKEEPER-198
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-198
>             Project: Bookkeeper
>          Issue Type: Bug
>            Reporter: Sijie Guo
>            Assignee: Sijie Guo
>             Fix For: 4.1.0
>
>         Attachments: BK-198.patch
>
>
> we found that replaying entries of deleted ledgers would exhaust ledger cache. then ledger cache would no clean page to grab, it would throw following exception.
> {code}
> java.util.NoSuchElementException
>         at java.util.LinkedList.getFirst(LinkedList.java:109)
>         at org.apache.bookkeeper.bookie.LedgerCacheImpl.grabCleanPage(LedgerCacheImpl.java:454)
>         at org.apache.bookkeeper.bookie.LedgerCacheImpl.putEntryOffset(LedgerCacheImpl.java:165)
> {code}
> this issue is because bookie grabs a clean page but fail to updating page due to NoLedgerException, but bookie doesn't return this clean page back to ledger cache. so the ledger cache is exhausted, when new ledger want to grab a clean page, it failed to find available page.

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