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https://issues.apache.org/jira/browse/STANBOL-1448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rupert Westenthaler resolved STANBOL-1448.
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Resolution: Fixed
> FST Linking engine MUST update IndexConfiguration after Solr index changes
> --------------------------------------------------------------------------
>
> Key: STANBOL-1448
> URL: https://issues.apache.org/jira/browse/STANBOL-1448
> Project: Stanbol
> Issue Type: Bug
> Affects Versions: 0.12.0
> Reporter: Rupert Westenthaler
> Assignee: Rupert Westenthaler
> Fix For: 1.0.0, 0.12.1
>
>
> While working in STANBOL-1447 i recognized that the current workflow of
> dealing with the Solr Index configuration of the FST linking engine is flawed.
> Currently the IndexConfiguration is created on every update of the Engine and
> on update to the SolrCore registration. On such updates the configuration of
> the engine is used to inspect the SolrCore to find FST configurations for
> different languages.
> As language specific values are typically stored in dynamic fields those
> information are only available if the Solr index contains a document that has
> a value of that field. (e.g. German will only be available after a document
> with a German label was added to the SolrCore).
> So when you start with an empty SolrIndex (typically when using an Entityhub
> Managed Site) when starting the FST linking engine no single FST corpus will
> be available (as the Solr Core is empty). This means that the
> IndexConfiguration will be empty.
> When adding Documents to the Solr Core (e.g. by uploading Entities to the
> Entityhub Managed Site) the IndexConfiguration will not be updated (as
> neither the Engine nor the SolrCore will be updated). So requests to the FST
> Linking Engine will not use the new data in the SolrCore for linking (as the
> Engine believes that the Index does not provide FST models for any language).
> To solve this issue one needs to
> # let the IndexConfiguration know based on what Solr index version it was
> built
> # for every call to the FST linking engine one needs to check if the Solr
> index version was updated
> # update the IndexConfiguration if the version of the Solr index has changed.
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