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https://issues.apache.org/jira/browse/BEAM-800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15617138#comment-15617138
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Manu Zhang commented on BEAM-800:
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Ok. The remaining issues are that {{ParDoEvaluator}} accepts {{DoFn}} now
(BEAM-788 ?) and {{DoFnInvoker}} is not {{Serializable}}
> DoFnLifeCycleManager should hold DoFnInvoker, not DoFn/OldDoFn
> --------------------------------------------------------------
>
> Key: BEAM-800
> URL: https://issues.apache.org/jira/browse/BEAM-800
> Project: Beam
> Issue Type: Bug
> Components: runner-direct
> Reporter: Kenneth Knowles
> Assignee: Manu Zhang
> Priority: Minor
>
> The {{DirectRunner}}'s support class {{DoFnLifecycleManager}} holds a cache
> of deserialized {{OldDoFn}} s, now being ported to {{DoFn}} s. But to execute
> a {{DoFn}} there is another layer of indirection through a {{DoFnInvoker}},
> which is the best object to cache here.
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