[MAPREDUCE-3671] AM-NM RPC calls occasionally takes a long time to respond

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.23.0
• Component/s: mrv2, nodemanager
• Assignee: Unassigned
• Reporter: Siddharth Seth
• Created: 13/Jan/12 22:37
• Updated: 18/Apr/14 16:24

Description

Observed while looking at MAPREDUCE-3596 and MAPREDUCE-3656.
startContainer taking over a minute in some cases, otherwise 15 seconds. Both were observed soon after reduce tasks started. Network congestion ? Need more looking into.