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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-13090) Progress heartbeats for long running scanners
Date Tue, 24 Feb 2015 17:41:05 GMT
Andrew Purtell created HBASE-13090:

             Summary: 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

It can be necessary to set very long timeouts for clients that issue scans over large regions
when all data in the region is filtered out. 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). 

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