[HBASE-18121] Scanner id should be reset when ScannerCallable reload the location

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Phil Yang
• Reporter: Phil Yang
• Created: 26/May/17 07:17
• Updated: 26/May/17 07:41

Description

If a scan rpc request failed, the RetryingCallable will retry by reload=true and may change the location because there may be a RS crash. However, the ScannerCallable will still use the previous scanner id and send to the new server. In new RS the scanner id is not related with the old RS. The most possible result is UnknowScannerException and client will retry and there will be one useless rpc. And there is a low probability that there is a scanner with same id in the new RS, the result will be totally wrong.

Issue Links

• relates to: HBASE-18122 Scanner id should include ServerName of region server