[MAPREDUCE-1495] Reduce locking contention on JobTracker.getTaskCompletionEvents() - ASF JIRA

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Details

Type: Improvement
Status: Resolved
Priority: Major
Resolution: Duplicate
Affects Version/s: 0.20.1
Fix Version/s: None
Component/s: None
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Description

While profiling JT for slow performance with small-jobs, it was observed that JobTracker.getTaskCompletionEvents() is attributing to 40% of lock contention on JT.

This JIRA ticket is created to explore the possibilities of reducing the sychronized code block in this method.

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Assignee:: Unassigned

Reporter:: Rajesh Balamohan

Votes:: 0 Vote for this issue

Watchers:: 9 Start watching this issue

Dates

Created:: 15/Feb/10 13:04

Updated:: 16/Feb/10 19:52

Resolved:: 16/Feb/10 19:52

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Reduce locking contention on JobTracker.getTaskCompletionEvents()