[#HADOOP-3875] Fix TaskTracker's heartbeat timer to note the time the hearbeat RPC returned to decide next heartbeat time

Hadoop Common

Fix TaskTracker's heartbeat timer to note the time the hearbeat RPC returned to decide next heartbeat time

Created: 31/Jul/08 01:19 AM Updated: 08/Jul/09 04:52 PM

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Component/s:

None

Affects Version/s:

0.18.0

Fix Version/s:

0.19.0

Time Tracking:

Not Specified

File Attachments:

	File Name	Date Attached	Attached By	Size
	HADOOP-3875_0_20080730.patch	2008-07-31 02:08 AM	Arun C Murthy	2 kB

Hadoop Flags:	Reviewed
Resolution Date:	08/Aug/08 11:36 PM

Description

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The tasktracker notes the time the heartbeat RPC was fired, rather than when it returned to decide when to send the next one. If the RPC spends a lot of time in the JobTracker's queue then the above exacerbates the load on the JobTracker.

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