[TEZ-3633] Implement keep-alive timeout in tez shuffle handler

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.9.0
• Target Version/s: 0.9.0
• Assignee: Jonathan Turner Eagles
• Reporter: Jonathan Turner Eagles
• Created: 21/Feb/17 21:15
• Updated: 22/Aug/17 00:03
• Resolved: 30/May/17 19:23

Description

MAPREDUCE-5787 which added keep-alive to mapreduce shuffle handler was not fully functional as despite advertising keep-alive option and adding the header to the response, all connections were closed immediately after write. This reduced the performance of certain fetches as now time is spent requesting a second get to the same serve, only for that server to reset the connection forcing the client to reestablish the connection on another port. The details of this is hidden behind HttpURLConnection and doesn't show in any log file at default logging level. However TCP sniffing does show errant behavior.

Issue Links

• is related to: MAPREDUCE-6850 Shuffle Handler keep-alive connections are closed from the server side