Lars Hofhansl created HBASE-13333:
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Summary: Renew Scanner Lease without advancing the RegionScanner
Key: HBASE-13333
URL: https://issues.apache.org/jira/browse/HBASE-13333
Project: HBase
Issue Type: Bug
Reporter: Lars Hofhansl
We have a usecase (for Phoenix) where we want to let the server know that the
client is still around. Like a client-side heartbeat.
Doing a full heartbeat is complicated, but we could add the ability to make
scanner call with caching set to 0. The server already does the right thing (it
renews the lease, but does not advance the scanner).
It looks like the client (ScannerCallable) also does the right thing. We cannot
break ResultScanner before HBase 2.0, but we can add a renewLease() method to
AbstractClientScaner. Phoenix (or any other caller) can then cast to
ClientScanner and call that method to ensure we renew the lease on the server.
It would be a simple and fully backwards compatible change. [~giacomotaylor]
Comments?
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