Solr error when initializing DSpace's search core

[Thiago Cavalcanti]

Hi there.

I recently installed a fresh DSpace instance after a while, but I'm encountering an error with the search core in Solr. When initializing it, Solr throws this error:

search: org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Could not load conf for core search: Can't load schema /var/solr/data/new_core/search/conf/schema.xml: Plugin init failure for [schema.xml] fieldType "text": Plugin init failure for [schema.xml] analyzer/filter: Error loading class 'org.apache.lucene.analysis.icu.ICUFoldingFilterFactory'

Any clues on how to solve this?

Thanks in advance,
Thiago

[Bill Tantzen]

Thiago,

What version of DSpace?  If you are on v7.x and have recently upgraded to solr v9.0.0 there are a few tweaks you need to make in the search core's solrconfig.xml (I can fill you in if this is the case).

~~Bill

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[Thiago Cavalcanti]

Hello, Bill.

Yes, that's the case. I'm running DSpace 7.2.1 and Solr 9.0.0.

Thanks in advance,
Thiago

[Tim Donohue]

Hi Bill,

Could you make sure to provide those "tweaks" for Solr 9 back to the codebase (if they are necessary in the codebase) and/or Installation Documentation?

https://wiki.lyrasis.org/display/DSDOC7x/Installing+DSpace#InstallingDSpace-ApacheSolr8.x(full-textindex/searchservice)

Currently, I see the Install Documentation does specify to use Solr 8. However, if we know there are specific changes needed to allow us to easily support Solr 9, then I'd support us making those changes. So, any hints you can provide (or a PR with recommended changes) would be welcome!

Thanks,

Tim

---

From: 'Bill Tantzen' via DSpace Technical Support <dspac...@googlegroups.com>
Sent: Wednesday, June 15, 2022 3:55 PM
To: Thiago Cavalcanti <tcava...@hcte.ufrj.br>; DSpace Technical Support <dspac...@googlegroups.com>
Subject: Re: [dspace-tech] Solr error when initializing DSpace's search core

 

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[Bill Tantzen]

near the top of search/conf/solrconfig.xml, try this (original config commented out):

    <!-- Include contributed libraries that we use in DSpace. -->
<!--<lib dir='${solr.install.dir}/contrib/analysis-extras/lib/'
         regex='icu4j-.*\.jar'/>
    <lib dir='${solr.install.dir}/contrib/analysis-extras/lucene-libs/'
         regex='lucene-analyzers-icu-.*\.jar'/>
    <lib dir="${solr.install.dir}/contrib/extraction/lib" />
    <lib dir="${solr.install.dir}/dist/"
         regex="solr-cell-\d.*\.jar" />-->
    <!-- the contributed libraries have a different location in solr 9.0 -->
    <lib dir='${solr.install.dir}/modules/analysis-extras/lib/'
         regex='icu4j-.*\.jar'/>
    <lib dir='${solr.install.dir}/modules/analysis-extras/lib/'
         regex='lucene-analysis-icu-.*\.jar'/>
    <lib dir='${solr.install.dir}/modules/extraction/lib' />

see if that helps!

~~Bill

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[Thiago Cavalcanti]

Hello, Bill.

Thanks! It works.

In order to get it back to the codebase (like Tim suggests), I guess that in the short run it would be better to support both 8 and 9, doing a check of which Solr version DSpace is dealing with.

Best regards,
Thiago