Thomas Graves created MAPREDUCE-4758:
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Summary: jobhistory web ui not showing correct # failed reducers
Key: MAPREDUCE-4758
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4758
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: jobhistoryserver, webapps
Affects Versions: 0.23.4
Reporter: Thomas Graves
Priority: Critical
we had a job fail due to a reducer failing 4 times. Unfortunately the job
history UI didn't show this particular failed reducer which lead to confusion
as to why the job failed.
This reducer failed to launch all 4 task attempts with a Token Expiration error
and the jobhistory file only gets an event when the task attempt transitions to
launched. The webapp JobInfo object only counts the task attempts in the
jobhistory file to display under the "Attempt Type" table, so since this task
didn't have an attempt with it, it did show it on the UI.
We need to reconcile the task list with the task attempts or also shows more
stats for the tasks vs task attempts.
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