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Duo Zhang commented on HBASE-17608: ----------------------------------- Will commit shortly. > Add suspend support for RawScanResultConsumer > --------------------------------------------- > > Key: HBASE-17608 > URL: https://issues.apache.org/jira/browse/HBASE-17608 > Project: HBase > Issue Type: Sub-task > Components: asyncclient, Client, scan > Affects Versions: 2.0.0 > Reporter: Duo Zhang > Assignee: Duo Zhang > Fix For: 2.0.0 > > Attachments: HBASE-17608.patch, HBASE-17608-v1.patch, > HBASE-17608-v2.patch, HBASE-17608-v3.patch, HBASE-17608-v4.patch, > HBASE-17608-v5.patch > > > Now for the AsyncResultScanner, we can only close the scanner if we reach the > cache size limit and open a new scanner later. This will breaks the region > level consistency. > For example, you put 10 rows to the region, and open a scanner to scan it. > The scanner returns 5 rows at the first time and the cache is full, so it > closes the background scanner. And before you reopens the scanner to fetch > data, the remaining 5 rows has been deleted and a compaction makes them gone > for ever. Then after you reopen the scanner you can not see the remaining 5 > rows. > So here we should keep the scanner open at RS side to prevent the data below > the mvcc read point of this scanner being deleted. -- This message was sent by Atlassian JIRA (v6.3.15#6346)