Huaxiang Sun created HBASE-25368:
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             Summary: Filter out more invalid encoded name in 
isEncodedRegionName(byte[] regionName) 
                 Key: HBASE-25368
                 URL: https://issues.apache.org/jira/browse/HBASE-25368
             Project: HBase
          Issue Type: Improvement
          Components: Client
            Reporter: Huaxiang Sun


{code:java}
public static boolean isEncodedRegionName(byte[] regionName) {
  // If not parseable as region name, presume encoded. TODO: add stringency; 
e.g. if hex.
  return parseRegionNameOrReturnNull(regionName) == null && regionName.length 
<= MD5_HEX_LENGTH;
}

Right now, if it passes in an table name, it still thinks  it is a encoded 
region name and will result in unnecessary registry query for meta regions. 
This can be avoided if table names can be filtered out early in this 
method.{code}



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