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https://issues.apache.org/jira/browse/SOLR-7632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18023061#comment-18023061
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Jan Høydahl commented on SOLR-7632:
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Let me draw attention to my PR [https://github.com/apache/solr/pull/3670] which
introduces the concept of Extraction Backends to the extraction handler.
It implements the "local" existing code path as one backend.
And it adds a new "tikaserver" backend implementation that delegates parsing to
a remote Tika Server, eliminating the resource-hungry and dangerous in-process
parsing in Solr itself.
The PR is still a draft with many rough edges, but proves that it can serve as
a drop-in replacement for the "local" backend, supporting "extractOnly",
"capture", "xPath" and the rest of the update-params users use today.
The plan is to first make the PR production ready, then split it in to parts.
# The first part is the backend interface and local backend, with no new
features. Merge it to branch_9x as well.
# The second part is adding the new code and backport to 9x, while at the same
time deprecating the local backend in 9x.
# Third part is to remove the entire tika java dependency in main branch,
leaving only the new implementation.
Thoughts?
> Change the ExtractingRequestHandler to use Tika-Server
> ------------------------------------------------------
>
> Key: SOLR-7632
> URL: https://issues.apache.org/jira/browse/SOLR-7632
> Project: Solr
> Issue Type: Improvement
> Components: contrib - Solr Cell (Tika extraction)
> Reporter: Chris A. Mattmann
> Assignee: Jan Høydahl
> Priority: Major
> Labels: gsoc2017, memex, pull-request-available
> Time Spent: 7h 40m
> Remaining Estimate: 0h
>
> It's a pain to upgrade Tika's jars all the times when we release, and if Tika
> fails it messes up the ExtractingRequestHandler (e.g., the document type
> caused Tika to fail, etc). A more reliable way and also separated, and easier
> to deploy version of the ExtractingRequestHandler would make a network call
> to the Tika JAXRS server, and then call Tika on the Solr server side, get the
> results and then index the information that way. I have a patch in the works
> from the DARPA Memex project and I hope to post it soon.
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