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https://issues.apache.org/jira/browse/SOLR-3382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13260742#comment-13260742
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Per Steffensen commented on SOLR-3382:
--------------------------------------
See patch attached to SOLR-3178
> Finegrained error propagation (focus on multi-document updates)
> ---------------------------------------------------------------
>
> Key: SOLR-3382
> URL: https://issues.apache.org/jira/browse/SOLR-3382
> Project: Solr
> Issue Type: New Feature
> Components: clients - java, Response Writers, update
> Affects Versions: 3.5
> Reporter: Per Steffensen
> Assignee: Per Steffensen
> Labels: client, documents, error, multiple, propagation, update
> Fix For: 4.0
>
>
> Today when an error occurs on server side during the handling of a request,
> the handling of the request will stop at the point when the error occured,
> and only a error-message (reason part of HTTP status line) and error-code
> (HTTP response code) is pushed back to the sender of the request.
> This can be improved in several ways
> - Reacting as a client on errors, solely based on a textual message and a
> HTTP response code is hard. The error ought have some kind of type telling
> the client which kind of error happened.
> - When handling multi-document updates the error might happen during the
> handling of one of the documents - potentially not the first document and
> potentially not the last document.
> -- The client ought to get information about which documents where
> successfully updated (the ones comming before the document creating the
> error).
> -- If the error updating a document is not due to a general problem, it could
> very well be that some of the documents not yet handled at the time of the
> error (the documents comming after the document creating the error), could be
> successfully updated - so why not try that.
> -- If continuing the updating of documents, even after one document-update
> resulted in an error (as suggested above), the updating of some of those
> documents might also result in an error. This leads to another improvement,
> namely being able to send information about more than one error back to the
> client.
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