Todd Lipcon created HBASE-5978:
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Summary: Scanner next() calls should return after a configurable
time threshold regardless of number of accumulated rows
Key: HBASE-5978
URL: https://issues.apache.org/jira/browse/HBASE-5978
Project: HBase
Issue Type: Improvement
Components: client, regionserver
Affects Versions: 0.92.1, 0.90.7
Reporter: Todd Lipcon
Currently if you pass a very restrictive filter to a scanner, along with a high
caching value, you will end up causing RPC timeouts, lease exceptions, etc.
Although this is a poor configuration and easy to work around by lowering
caching, HBase should be resilient to a badly chosen caching value. As such,
the scanner next() call should record the elapsed time, and after some number
of seconds have passed, return any accumulated rows regardless of the caching
value. This prevents the calls from starving out other threads or region
operations.
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