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https://issues.apache.org/jira/browse/TEZ-2431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Turner Eagles resolved TEZ-2431.
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Resolution: Won't Fix
Closing recovery v1 bugs/features.
> Recovery of task events (eg. datamovement events) should not depend on
> ordering of task attempt events
> ------------------------------------------------------------------------------------------------------
>
> Key: TEZ-2431
> URL: https://issues.apache.org/jira/browse/TEZ-2431
> Project: Apache Tez
> Issue Type: Sub-task
> Reporter: Bikas Saha
> Priority: Major
>
> Today, task attempt events need to go through verteximpl before reaching the
> task in order to maintain ordering guarantees for recovery. This causes these
> events to be routed twice through the dispatcher. This can cause overhead
> delays in large jobs. Also, this makes assumptions about event ordering which
> make the system fragile. Recovery should work independently of other system
> interactions so that evolution of other components is not affected by
> recovery unless it affects recovery logically.
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