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https://issues.apache.org/jira/browse/SOLR-16700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Pugh resolved SOLR-16700.
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Resolution: Won't Fix
Per SOLR-17655, the recommendation for the future is to use in place updates
for numeric fields.
> NullPointerException during the deletion of the last document using external
> field
> ----------------------------------------------------------------------------------
>
> Key: SOLR-16700
> URL: https://issues.apache.org/jira/browse/SOLR-16700
> Project: Solr
> Issue Type: Bug
> Affects Versions: 8.11
> Reporter: Minerva
> Priority: Major
>
> I noticed a NullPointerException in solr.log file when I delete all the
> documents from the solr index.
> I downloaded a new version of solr 8.11. Extracted the file and configured a
> schema so that it had only 3 fields: id, merchant and an external field
> related to the merchant field, named "external_merchant_rating". I added some
> documents to a test core and then removed them one by one. When I removed the
> last one, I got a NullPointerException.
> {code:java}
> 2023-02-10 12:34:40.524 ERROR (searcherExecutor-80-thread-1-processing-x:xx)
> [ x:xx] o.a.s.c.SolrCore null => java.lang.NullPointerException at
> org.apache.solr.search.function.FileFloatSource.getFloats(FileFloatSource.java:295)
> java.lang.NullPointerException: null at
> org.apache.solr.search.function.FileFloatSource.getFloats(FileFloatSource.java:295)
> ~[?:?] at
> org.apache.solr.search.function.FileFloatSource.access$000(FileFloatSource.java:62)
> ~[?:?] at
> org.apache.solr.search.function.FileFloatSource$2.createValue(FileFloatSource.java:164)
> ~[?:?] at
> org.apache.solr.search.function.FileFloatSource$Cache.refresh(FileFloatSource.java:177)
> ~[?:?] at
> org.apache.solr.search.function.FileFloatSource.refreshCache(FileFloatSource.java:151)
> ~[?:?] at
> org.apache.solr.schema.ExternalFileFieldReloader.newSearcher(ExternalFileFieldReloader.java:76)
> ~[?:?] at
> org.apache.solr.core.SolrCore.lambda$getSearcher$17(SolrCore.java:2416)
> ~[?:?] at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?] at
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:218)
> ~[?:?] at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> ~[?:?] at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> ~[?:?] at java.lang.Thread.run(Thread.java:829) [?:?]{code}
> As follow are my configuration files.
> managed-schema.xml
>
> {code:java}
> ...
> <fieldType name="merchantEntryRankFile" keyField="merchant" defVal="0.1"
> stored="false" indexed="false"
> class="solr.ExternalFileField"/>
> <field name="merchant" type="string" indexed="true" stored="true"
> required="false"/>
> <field name="merchant_rating" type="merchantEntryRankFile"/>
> ...
> {code}
> solrconfig.xml
>
> {code:java}
> ...
> <listener event="newSearcher"
> class="org.apache.solr.schema.ExternalFileFieldReloader"/>
> <listener event="firstSearcher"
> class="org.apache.solr.schema.ExternalFileFieldReloader"/>
> ...
> {code}
>
> I observed that if I remove the two listeners from the solrconfig.xml file
> the NullPointerException does not happen cleaning the core/removing documents
> one by one.
> The configuration of the two listeners is the one suggested from the Solr
> official documentation.
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