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https://issues.apache.org/jira/browse/HBASE-26777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17499003#comment-17499003
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Istvan Toth commented on HBASE-26777:
-------------------------------------
Thinking some more about it,
org.apache.phoenix.coprocessor.SequenceRegionObserver is using HRegion.get() in
a way that other HBase components are not, and we should probably look into
avoiding the HRegion.get() call there for performance reasons (we may be able
to use the same pattern that HBASE-26036 used for replacing HRegion.get())
> BufferedDataBlockEncoder$OffheapDecodedExtendedCell.deepClone throws
> UnsupportedOperationException
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-26777
> URL: https://issues.apache.org/jira/browse/HBASE-26777
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 2.4.10
> Reporter: Istvan Toth
> Priority: Major
>
> BufferedDataBlockEncoder$OffheapDecodedExtendedCell.deepClone throws an
> unsupportedException.
> However, org.apache.hadoop.hbase.regionserver.HRegion.get(Get, boolean, long,
> long)
> calls the method:
> {code:java}
> // Copy EC to heap, then close the scanner.
> // This can be an EXPENSIVE call. It may make an extra copy from
> offheap to onheap buffers.
> // See more details in HBASE-26036.
> for (Cell cell : tmp) {
> results.add(cell instanceof ByteBufferExtendedCell ?
> ((ByteBufferExtendedCell) cell).deepClone(): cell);
> } {code}
> According to the comment above, this is probably caused by HBASE-26036.
>
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