nkeywal created HBASE-8136:
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Summary: coprocessor service requires .meta. to be available all
the time.
Key: HBASE-8136
URL: https://issues.apache.org/jira/browse/HBASE-8136
Project: HBase
Issue Type: Bug
Components: Client, Coprocessors
Affects Versions: 0.96.0
Reporter: nkeywal
Priority: Minor
HTable#getRegionLocations does not use a cache: all the calls to this function
go to .META.
So:
- we're missing an opportunity to reuse/update the location cache in the
HConnection.
- this method is called by the coprocessor service. So, for people using this
features, they have .meta. on their execution path, and it's not good for
performances, scalability and reliability.
I'm not totally clear on the fix. I think it should be possible to use the
cache to see if we have all regions for the table. But it means we won't always
have the last version when calling getRegionLocations.
Any thought on this?
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