anchor.diff:  
   [[upgrade2.0.dependencies]]
   .Significant changes to runtime classpath
  -A number of internal dependencies for HBase were updated or removed from the runtime classpath. Downstream client users who do not follow the guidance in [[upgrade2.0.shaded.client.preferred]] will have to examine the set of dependencies Maven pulls in for impact. Downstream users of LimitedPrivate Coprocessor APIs will need to examine the runtime environment for impact. For details on our new handling of third party libraries that have historically been a problem with respect to harmonizing compatible runtime versions, see the reference guide section [[thirdparty]].
  +A number of internal dependencies for HBase were updated or removed from the runtime classpath. Downstream client users who do not follow the guidance in <<upgrade2.0.shaded.client.preferred>> will have to examine the set of dependencies Maven pulls in for impact. Downstream users of LimitedPrivate Coprocessor APIs will need to examine the runtime environment for impact. For details on our new handling of third party libraries that have historically been a problem with respect to harmonizing compatible runtime versions, see the reference guide section <<thirdparty>>.
   
   [[upgrade2.0.public.api]]
   .Multiple breaking changes to source and binary compatibility for client API
  
positive.code: 
  HBase can no longer read the deprecated WAL files written in the Apache Hadoop Sequence File format. The hbase.regionserver.hlog.reader.impl and hbase.regionserver.hlog.reader.impl configuration entries should be set to use the Protobuf based WAL reader / writer classes. This implementation has been the default since HBase 0.96, so legacy WAL files should not be a concern for most downstream users.
  
  A clean cluster shutdown should ensure there are no WAL files. If you are unsure of a given WAL file's format you can use the `hbase wal` command to parse files while the HBase cluster is offline. In HBase 2.0+, this command will not be able to read a Sequence File based WAL. For more information on the tool see the section [[hlog_tool.prettyprint]].
  
  [[upgrade2.0.filters]]
  .Change in behavior for filters
  
negative.code: 
  The following metrics have been removed:
  
  * Metrics related to the Distributed Log Replay feature are no longer present. They were previsouly found in the region server context under the name 'replay'. See the section <<upgrade2.0.distributed.log.replay>> for details.
  
  The following metrics have been added:
  
  