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https://issues.apache.org/jira/browse/HBASE-30038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HBASE-30038:
-----------------------------------
    Labels: pull-request-available  (was: )

> RefCnt Leak error when caching
> ------------------------------
>
>                 Key: HBASE-30038
>                 URL: https://issues.apache.org/jira/browse/HBASE-30038
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Dimas Shidqi Parikesit
>            Priority: Critical
>              Labels: pull-request-available
>
> This bug is similar to 
> [HBASE-28890|https://issues.apache.org/jira/browse/HBASE-28890]
> HFileBlock.Writer.getBlockForCaching() creates a ref-counted HFileBlock, and 
> the caller must release its own reference after the cache has taken the 
> ownership it needs. 
> In HFileWriterImpl.java, the leak happened when shouldCacheBlock() returned 
> before cacheFormatBlock.release() ran.
> In HFileBlockIndex.java, the intermediate-index path cached blockForCaching 
> but never released the reference at all. 
> Because these blocks can be backed by pooled off-heap ByteBuffs, repeated 
> HFile writes could steadily drain allocator buffers and effectively leak 
> memory, even though the blocks were only meant to live long enough to be 
> considered for cache-on-write.



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