[HIVE-12496] Open ServerTransport After MetaStore Initialization

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.2.1
• Fix Version/s: 2.0.0
• Component/s: Metastore

Environment

Standalone MetaStore, cluster mode(multiple instances)

• Assignee: Nemon Lou
• Reporter: Nemon Lou
• Created: 23/Nov/15 09:12
• Updated: 16/Feb/16 23:50
• Resolved: 26/Nov/15 19:45

Description

During HiveMetaStore starting,the following steps should be reordered:
1,Creation of TServerSocket
2,Creation of HMSHandler
3,Creation of TThreadPoolServer

Step 2 involves some initialization work including :

          createDefaultDB();
          createDefaultRoles();
          addAdminUsers();

TServerSocket shall be created after these initialization work to prevent unnecessary waiting from client side.And if there are errors during initialization (multiple metastores creating default DB at the same time can cause errors),clients shall not connect to this metastore as it will shuting down due to error.