[HBASE-12112] Avoid KeyValueUtil#ensureKeyValue some more simple cases

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.99.1
• Component/s: regionserver
• Hadoop Flags: Reviewed
• Assignee: Anoop Sam John
• Reporter: Anoop Sam John
• Created: 27/Sep/14 02:15
• Updated: 06/Apr/18 17:55
• Resolved: 01/Oct/14 08:47

Description

This include fixes with

• Replace KeyValue#heapSize() with CellUtil#estimatedHeapSizeOf(Cell)
• Printing the key portion of a cell (rk+cf+q+ts+type). These are in Exception messages
• HFilePrettyPrinter - Avoiding ensureKeyValue() calls and calls to cell#getxxx() which involves bytes copying. This is not a hot area still we can avoid as much usage of deprecated methods as possible in core code. I believe these bytes copying methods are used in many other parts and later we can try fixing those as per area importance
• Creating CellUtil#createKeyOnlyCell and using that in KeyOnlyFilter