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Eshcar Hillel commented on HBASE-13090: --------------------------------------- Could be useful to return a *non* empty result array even when the region is not exhausted. For example, if the scanner is async (HBASE-13071) the application can start iterating over the results instead of waiting for the server to collect the entire batch. > Progress heartbeats for long running scanners > --------------------------------------------- > > Key: HBASE-13090 > URL: https://issues.apache.org/jira/browse/HBASE-13090 > Project: HBase > Issue Type: New Feature > Reporter: Andrew Purtell > Assignee: Jonathan Lawlor > Attachments: HBASE-13090-v1.patch, HBASE-13090-v2.patch, > HBASE-13090-v3.patch, HBASE-13090-v3.patch > > > It can be necessary to set very long timeouts for clients that issue scans > over large regions when all data in the region might be filtered out > depending on scan criteria. This is a usability concern because it can be > hard to identify what worst case timeout to use until scans are > occasionally/intermittently failing in production, depending on variable scan > criteria. It would be better if the client-server scan protocol can send back > periodic progress heartbeats to clients as long as server scanners are alive > and making progress. > This is related but orthogonal to streaming scan (HBASE-13071). -- This message was sent by Atlassian JIRA (v6.3.4#6332)