anchor.diff:  [source,xml]
   ----
   <requestHandler name="/cdcr" class="solr.CdcrRequestHandler">
  +  <!-- recommended for Target clusters -->
     <lst name="buffer">
       <str name="defaultState">disabled</str>
     </lst>
  
positive.code: 
  === Source Configuration
  
  Here is a sample of a Source configuration file, a section in `solrconfig.xml`. The presence of the <replica> section causes CDCR to use this cluster as the Source and should not be present in the Target collections. Details about each setting are after the two examples:
  
  [source,xml]
  ----
  <requestHandler name="/cdcr" class="solr.CdcrRequestHandler">
    <lst name="replica">
      <str name="zkHost">10.240.18.211:2181,10.240.18.212:2181</str>
  
negative.code:   <lst name="updateLogSynchronizer">
      <str name="schedule">1000</str>
    </lst>
  
    <!-- optional -->
    <lst name="buffer">
      <str name="defaultState">DISABLED</str>
    </lst>
  
  </requestHandler>
  
  <!-- Modify the <updateLog> section of your existing <updateHandler>
  