bbeaudreault commented on code in PR #4770:
URL: https://github.com/apache/hbase/pull/4770#discussion_r1081931496


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hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/HFileOutputFormat2.java:
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@@ -152,6 +153,10 @@ protected static byte[] combineTableNameSuffix(byte[] 
tableName, byte[] suffix)
   static final String BLOCK_SIZE_FAMILIES_CONF_KEY = 
"hbase.mapreduce.hfileoutputformat.blocksize";
   static final String DATABLOCK_ENCODING_FAMILIES_CONF_KEY =
     "hbase.mapreduce.hfileoutputformat.families.datablock.encoding";
+  public static final String TABLE_NAME_WITH_NAMESPACE_INCLUSIVE_KEY =

Review Comment:
   can you just add a quick comment to this: 
   ```
   // When MULTI_TABLE_HFILEOUTPUTFORMAT_CONF_KEY is enabled, should table 
names be written 
   // with namespace included. Enabling this means downstream jobs which use 
this output will need to account
   // for namespace when finding the directory of the job output.
   // For example: a table named my-table in namespace default would be in 
`/output/default/my-table`
   // instead of current `/output/my-table`
   // This will be the behavior when upgrading to hbase 3.0.
   ```



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