[HAWQ-720] Simplify libyarn interface when passing RM/RM scheduler to it

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: backlog
• Component/s: libyarn
• Assignee: Wen Lin
• Reporter: Wen Lin
• Created: 06/May/16 07:58
• Updated: 14/Jul/16 21:05

Description

The current libyarnclient constructor is:
LibYarnClient(string &user, string &rmHost, string &rmPort, string &schedHost,
string &schedPort, string &amHost, int32_t amPort,
string &am_tracking_url, int heartbeatInterval);
RM host/RM port, scheduler host/scheduler port can be read from yarn-site.xml
no need to pass them to this constructor.

Also, libyarn can get RM HA information from yarn-site.xml, no need to maintain it in yarn-client.xml

After this improvement, the libyarn interface will be much cleaner.