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

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.18.0
• Fix Version/s: 0.19.0
• Hadoop Flags: Reviewed
• Assignee: Arun Murthy
• Reporter: Arun Murthy
• Created: 31/Jul/08 01:19
• Updated: 08/Jul/09 16:52
• Resolved: 08/Aug/08 23:36

Description

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.