Finegrained error propagation (focus on multi-document updates)
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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
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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