[KUDU-2936] built-in NTP client: simplified implementation to work with well behaved/trusted servers

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.11.0
• Component/s: ntp-client
• Labels: clock ntp
• Code Review: https://gerrit.cloudera.org/#/c/7477/
• Assignee: Alexey Serbin
• Reporter: Alexey Serbin
• Created: 14/Sep/19 01:15
• Updated: 03/Feb/20 20:06
• Resolved: 14/Oct/19 23:34

Description

The first implementation should be able to work with well-behaved NTP servers, not to be super strict to follow all RFC5905 provisions. It must accept list of NTP servers to work with, and by default it should be a list of publicly available NTP servers.

The client must not latch on non-synchronized NTP servers or set of servers whose true time is too far from each other.

tlipcon has posted a WIP for such an implementation already: see the 'Code Review' link.

Issue Links

• requires: KUDU-2928 built-in NTP client: tests to evaluate the behavior of the client