[HBASE-16266] Do not throw ScannerTimeoutException when catch UnknownScannerException

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.0, 1.4.0, 1.2.2, 1.1.6, 2.0.0
• Fix Version/s: 1.3.0, 1.1.6, 1.2.3, 2.0.0
• Component/s: Client, Scanners
• Hadoop Flags: Reviewed
• Assignee: Phil Yang
• Reporter: Phil Yang
• Created: 21/Jul/16 12:07
• Updated: 09/Nov/17 04:19
• Resolved: 25/Jul/16 18:01

Description

Now in scanner we have heartbeat to prevent timeout. The time blocked on ResultScanner.next() may much longer than scanner timeout. So it is no need any more to throw ScannerTimeoutException when server throws UnknownScannerException, we can just reset the scanner like NotServingRegionException

Issue Links

• relates to: HBASE-2481 Client is not getting UnknownScannerExceptions; they are being eaten