[MAPREDUCE-5700] historyServer can't show container's log when aggregation is not enabled

• Type: Improvement
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.23.7, 2.0.4-alpha, 2.2.0
• Labels: BB2015-05-TBR

Environment

yarn.log-aggregation-enable=false , HistoryServer will show like this:

Aggregation is not enabled. Try the nodemanager at hd13-vm1:34669

• Assignee: shenh062326
• Reporter: shenh062326
• Created: 06/May/13 13:24
• Updated: 06/May/15 03:34

Description

When yarn.log-aggregation-enable is seted to false, after a MR_App complete, we can't view the container's log from the HistoryServer, it shows message like:
Aggregation is not enabled. Try the nodemanager at hd13-vm1:34669

Since we don't want to aggregate the container's log, because it will be a pressure to namenode. but sometimes we also want to take a look at container's log.
Should we show the container's log across HistoryServer even if yarn.log-aggregation-enable is seted to false.