Todd Lipcon created YARN-2491:
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Summary: Speculative attempts should not run on the same node as
their original attempt
Key: YARN-2491
URL: https://issues.apache.org/jira/browse/YARN-2491
Project: Hadoop YARN
Issue Type: Bug
Components: scheduler
Affects Versions: 3.0.0
Reporter: Todd Lipcon
I'm seeing a behavior on trunk with fair scheduler enabled where a speculative
reduce attempt is getting run on the same node as its original attempt. This
doesn't make sense -- the main reason for speculative execution is to deal with
a slow node, so scheduling a second attempt on the same node would just make
the problem worse if anything.
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