anchor.diff:  hbase(main):003:0> trace 'stop'
   ----
   
  -+trace 'start'+ and +trace 'stop'+ always returns boolean value representing if or not there is ongoing tracing.
  -As a result, +trace
  -        'stop'+ returns false on suceess. +trace 'status'+ just returns if or not tracing is turned on. 
  +`trace 'start'` and `trace 'stop'` always returns boolean value representing if or not there is ongoing tracing.
  +As a result, `trace 'stop'` returns false on success. `trace 'status'` just returns if or not tracing is turned on. 
   
   [source]
   ----
  
positive.code: :icons: font
  :experimental:
  
  link:https://issues.apache.org/jira/browse/HBASE-6449[HBASE-6449] added support for tracing requests through HBase, using the open source tracing library, link:http://github.com/cloudera/htrace[HTrace].
  Setting up tracing is quite simple, however it currently requires some very minor changes to your client code (it would not be very difficult to remove this requirement). 
  
  [[tracing.spanreceivers]]
  === SpanReceivers
  
  The tracing system works by collecting information in structs called 'Spans'. It is up to you to choose how you want to receive this information by implementing the `SpanReceiver` interface, which defines one method: 
  
  [source]
  ----
  
negative.code: [[tracing.client.shell]]
  == Tracing from HBase Shell
  
  You can use `trace` command for tracing requests from HBase Shell. `trace 'start'` command turns on tracing and `trace 'stop'` command turns off tracing. 
  
  [source]
  ----
  