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https://issues.apache.org/jira/browse/TEZ-1384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14209942#comment-14209942
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Hitesh Shah commented on TEZ-1384:
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I am not sure if this will be that simple due to the other concern [~bikassaha]
had which was to re-use the transition functions when restoring the state so
that the same logic is applied in normal flow as well as recovery flow.
> Move recovery related code into inner class
> -------------------------------------------
>
> Key: TEZ-1384
> URL: https://issues.apache.org/jira/browse/TEZ-1384
> Project: Apache Tez
> Issue Type: Sub-task
> Reporter: Jeff Zhang
> Assignee: Jeff Zhang
> Attachments: Tez-1384-2.patch, Tez-1384.patch
>
>
> Currently each entity (DAG, Vertex, Task, TaskAttempt) has some common
> recovery code like log history event and restore from history event. These
> are 2 opposite aspects of recovery. One for store status while the other is
> for restore status. This jira is for putting these pieces of code together (
> in an inner class ). In this way, it is easy to maintain and cut down the
> possibility that one field is not stored or restored.
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