[HBASE-26777] BufferedDataBlockEncoder$OffheapDecodedExtendedCell.deepClone throws UnsupportedOperationException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.10
• Fix Version/s: 2.5.0, 3.0.0-alpha-3, 2.4.11
• Component/s: regionserver
• Assignee: Istvan Toth
• Reporter: Istvan Toth
• Created: 28/Feb/22 15:50
• Updated: 01/Sep/22 10:57
• Resolved: 04/Mar/22 21:53

Description

BufferedDataBlockEncoder$OffheapDecodedExtendedCell.deepClone throws an unsupportedException.

However, org.apache.hadoop.hbase.regionserver.HRegion.get(Get, boolean, long, long)

calls the method:

      // 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);
      } 

According to the comment above, this is probably caused by HBASE-26036.

 

Issue Links

• is caused by: HBASE-26036 DBB released too early and dirty data for some operations
• relates to: PHOENIX-6658 Replace HRegion.get() calls
• links to: GitHub Pull Request #4139