Bryan Beaudreault created HBASE-26790:
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Summary: getAllRegionLocations can cache locations with null
hostname
Key: HBASE-26790
URL: https://issues.apache.org/jira/browse/HBASE-26790
Project: HBase
Issue Type: Bug
Reporter: Bryan Beaudreault
RegionLocator methods typically delegate to
ConnectionImplementation.locateRegion, which throws a
NoServerForRegionException if the located region's serverName is null.
RegionLocator.getAllRegionLocations does not go through that path, instead
caching all returned region locations without any validation. This can result
in a "dirty" meta cache, since clients do not expect to have null serverNames
in the meta cache. We should add the same throwing ofÂ
NoServerForRegionException to this method as used in the others. Or at least we
should not cache the result if the serverName is null.
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