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https://issues.apache.org/jira/browse/ACCUMULO-625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633015#comment-13633015
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Keith Turner commented on ACCUMULO-625:
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I thought someone had create a ticket to add a close method to iterators, but I
did not find it. I was thinking this would be a natural place to return state
that is sent back to the client.
> consider augmenting session state with "breadcrumbs"
> ----------------------------------------------------
>
> Key: ACCUMULO-625
> URL: https://issues.apache.org/jira/browse/ACCUMULO-625
> Project: Accumulo
> Issue Type: Improvement
> Components: tserver
> Reporter: Eric Newton
> Assignee: Keith Turner
>
> Presently, the iterator stack can be created and destroyed at the whim of the
> tserver and its buffering needs. In complex iterations, lower-level
> iterators can make significant progress which is not inherently obvious in
> any returned key. When the iterator stack is re-created to continue a query,
> the last key returned is used to {{seek()}} the iterators. Lower-level
> iterators must re-scan their data to move back to the old position.
> Consider a mechanism to save progress beyond the last key returned.
>
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