HDFS-8351. Remove namenode -finalize option from document. (aajisaka)

(cherry picked from commit 3fa2efc09f)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -406,6 +406,8 @@ Release 2.8.0 - UNRELEASED
     HDFS-8097. TestFileTruncate is failing intermittently. (Rakesh R via
     Arpit Agarwal)
 
+    HDFS-8351. Remove namenode -finalize option from document. (aajisaka)
+
 Release 2.7.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md

@@ -432,7 +432,7 @@ Usage:
 | `-upgradeOnly` `[-clusterid cid]` [`-renameReserved` \<k-v pairs\>] | Upgrade the specified NameNode and then shutdown it. |
 | `-rollback` | Rollback the NameNode to the previous version. This should be used after stopping the cluster and distributing the old Hadoop version. |
 | `-rollingUpgrade` \<downgrade\|rollback\|started\> | See [Rolling Upgrade document](./HdfsRollingUpgrade.html#NameNode_Startup_Options) for the detail. |
-| `-finalize` | Finalize will remove the previous state of the files system. Recent upgrade will become permanent. Rollback option will not be available anymore. After finalization it shuts the NameNode down. |
+| `-finalize` | No longer supported. Use `dfsadmin -finalizeUpgrade` instead. |
 | `-importCheckpoint` | Loads image from a checkpoint directory and save it into the current one. Checkpoint dir is read from property fs.checkpoint.dir |
 | `-initializeSharedEdits` | Format a new shared edits dir and copy in enough edit log segments so that the standby NameNode can start up. |
 | `-bootstrapStandby` | Allows the standby NameNode's storage directories to be bootstrapped by copying the latest namespace snapshot from the active NameNode. This is used when first configuring an HA cluster. |