[GitHub] [bookkeeper] ytong01 opened a new issue, #4056: Update a dirty page

["ytong01 (via GitHub)" <gi...@apache.org>]

ytong01 opened a new issue, #4056:
URL: https://github.com/apache/bookkeeper/issues/4056

   **QUESTION**
   
   Recently I'm reading the code associates with how  bookkeeper writes indexes for a ledger,  and there is a piece of logic about grab an available LedgerEntryPage from cache.
   
   <img width="752" alt="image" src="https://github.com/apache/bookkeeper/assets/32755366/6e4f5942-baeb-4d9c-af79-4cb74aa0c92d">
   
   <img width="633" alt="image" src="https://github.com/apache/bookkeeper/assets/32755366/f81256ef-27e1-4866-890a-a7a77940f842">
   
   <img width="590" alt="image" src="https://github.com/apache/bookkeeper/assets/32755366/3665f5a4-7cd3-4cb5-adcb-c180ca51f675">
   
   <img width="585" alt="image" src="https://github.com/apache/bookkeeper/assets/32755366/9208ff40-8333-4a49-a779-00f5797475e4">
   
   step 1: Try to get a available page from listOfFreePages
   step 2: reset the page
      step 2.1: reset the metadata, including set the entryKey to new EntryKey(-1, -1)
      step 2.2: put the LEP into lruCleanPageMap, note the key is new EntryKey(-1,-1) 
   step 3: Reassign the entryKey of LEP with new EntryKey(ledgerId, firstEntryId)
   step 4: increment the use count and remove LEP with the reassigned entryKey, but it can't remove the page since the key is different.
   
   We have a productive error about "Trying to update a dirty page" and I'm not sure it matters, would be appreciate if someone will reply on it.


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[GitHub] [bookkeeper] liangyuanpeng commented on issue #4056: Update a dirty page

["liangyuanpeng (via GitHub)" <gi...@apache.org>]

liangyuanpeng commented on issue #4056:
URL: https://github.com/apache/bookkeeper/issues/4056#issuecomment-1715003015

   Also can try to ask it at the slack or email list.


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