[HDFS-10404] Fix formatting of CacheAdmin command usage help text

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.1
• Fix Version/s: 2.9.0, 3.0.0-alpha1
• Component/s: caching
• Target Version/s: 2.9.0
• Assignee: Yiqun Lin
• Reporter: Yiqun Lin
• Created: 16/May/16 01:52
• Updated: 02/Oct/19 17:14
• Resolved: 17/May/16 18:59

Description

In CacheAdmin, there are two places that not completely showing the cmd usage message.

$ hdfs cacheadmin
Usage: bin/hdfs cacheadmin [COMMAND]
          [-addDirective -path <path> -pool <pool-name> [-force] [-replication <replication>] [-ttl <time-to-live>]]
          [-modifyDirective -id <id> [-path <path>] [-force] [-replication <replication>] [-pool <pool-name>] [-ttl <time-to-live>]]
          [-listDirectives [-stats] [-path <path>] [-pool <pool>] [-id <id>]
          [-removeDirective <id>]
          [-removeDirectives -path <path>]
          [-addPool <name> [-owner <owner>] [-group <group>] [-mode <mode>] [-limit <limit>] [-maxTtl <maxTtl>]

The command -listDirectives and -addPool are not showing completely, they are both lacking a ']' in the end of line.

In the CentralizedCacheManagement.md, there is also a similar problem. The page of CentralizedCacheManagement can also showed this, https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/CentralizedCacheManagement.html