[HBASE-19861] Avoid using RPCs when querying table infos for master status pages

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0-beta-2, 2.0.0
• Component/s: UI
• Hadoop Flags: Reviewed
• Assignee: Xiaolin Ha
• Reporter: Xiaolin Ha
• Created: 25/Jan/18 07:31
• Updated: 19/Jun/18 05:54
• Resolved: 26/Jan/18 16:04

Description

When querying table information for master status pages, currently method is using admin interfaces. For example, when list user tables, codes are as follows.

Connection connection = master.getConnection();
Admin admin = connection.getAdmin();
try

{ tables = admin.listTables(); }

finally

{ admin.close(); }

But actually, we can get all user tables from master's memory.

Using admin interfaces means using RPCs, which has a low efficiency.