anchor.diff:    <value>/etc/hbase/conf/keytab.krb5</value>
   </property>
   <!-- optional params -->
  -property>
  +<property>
     <name>hbase.client.dns.interface</name>
     <value>default</value>
   </property>
  
positive.code: === Canary
  
  There is a Canary class can help users to canary-test the HBase cluster status, with every column-family for every regions or RegionServer's granularity.
  To see the usage, use the `--help` parameter.
  
  ----
  $ ${HBASE_HOME}/bin/hbase canary -help
  
negative.code: with the `-treatFailureAsError` option. When enabled, read / write failure would result in error
  exit code.
  ----
  $ ${HBASE_HOME}/bin/hbase canary -treatFailureAsError
  ----
  
  ==== Running Canary in a Kerberos-enabled Cluster
  