Feng Honghua created HBASE-10662:
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Summary: RegionScanner should be closed and according lease should
be cancelled in regionserver immediately if the related region has been
re-opened during performing scan request
Key: HBASE-10662
URL: https://issues.apache.org/jira/browse/HBASE-10662
Project: HBase
Issue Type: Bug
Components: regionserver
Reporter: Feng Honghua
Assignee: Feng Honghua
During regionserver processes scan request from client, it fails the request by
throwing a wrapped NotServingRegionException to client if it finds the region
related to the passed-in scanner-id has been re-opened, and it also removes the
RegionScannerHolder from the scanners. In fact under this case, the old and
invalid RegionScanner related to the passed-in scanner-id should be closed and
the related lease should be cancelled at the mean time as well.
Currently region's related scanners aren't closed when closing the region, a
region scanner is closed only when requested explicitly by client, or by
expiration of the related lease, in this sense the close of region scanners is
quite passive and lag.
Sounds reasonable to cleanup all related scanners and cancel these scanners'
leases after closing a region?
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