[HBASE-4196] TableRecordReader may skip first row of region

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.90.4
• Fix Version/s: 0.90.5
• Component/s: mapreduce
• Hadoop Flags: Reviewed
• Assignee: Ming Ma
• Reporter: Jan Lukavsky
• Created: 12/Aug/11 09:54
• Updated: 20/Nov/15 11:52
• Resolved: 13/Aug/11 05:23

Description

After the following scenario, the first record of region is skipped, without being sent to Mapper:

• the reader is initialized with TableRecordReader.init()
• then nextKeyValue is called, causing call to scanner.next() - here ScannerTimeoutException occurs
• the scanner is restarted by call to restart() and then two calls to scanner.next() occur, causing we have lost the first row

Issue Links

• is depended upon by: HBASE-4269 Add tests and restore semantics to TableInputFormat/TableRecordReader