[SENTRY-1510] Add option to use non pool model for sentry client

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Assignee: Li Li
• Reporter: Li Li
• Created: 25/Oct/16 00:12
• Updated: 24/Jul/17 15:36
• Resolved: 26/Oct/16 17:33

Description

Currently sentry clients e.g. impala uses non pool model (SentryPolicyServiceClientDefaultImpl), thus it's better to keep the non pool model for those clients to avoid unnecessary incompatible issues.
Also the current pool model (PoolClientInvocationHandler) does not manage the opening connections well. e.g. Opening connections with failed servers should be closed promptly.

Issue Links

• links to: code review