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https://issues.apache.org/jira/browse/SOLR-14662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18041828#comment-18041828
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Eric Pugh commented on SOLR-14662:
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[~smk] want to update the patch and open a pr for solr 10?
> Elevation with distributed search causes NPE
> --------------------------------------------
>
> Key: SOLR-14662
> URL: https://issues.apache.org/jira/browse/SOLR-14662
> Project: Solr
> Issue Type: Bug
> Affects Versions: 8.2
> Reporter: Marc Linden
> Priority: Major
> Labels: distributed_search, elevation
> Attachments:
> SOLR-14662-Elevation-with-distributed-search-causes-.patch
>
>
> When performing a distributed search with multiple shards having elevation
> configured where one ore more shards do have elevated results but others do
> not a NullPointerException is thrown.
> We are using Solr 8.2 and have the QueryElevationComponent configured with
> "last-components" of the default search handler "/select". But the problem
> also occurs when using the explicit "/elevate" search handler.
> {code:xml}
> <requestHandler name="/select" class="solr.SearchHandler">
> ...
> <arr name="last-components">
> <str>elevator</str>
> </arr>
> </requestHandler>
> ...
> <searchComponent name="elevator" class="solr.QueryElevationComponent" >
> <!-- pick a fieldType to analyze queries -->
> <str name="queryFieldType">string</str>
> <str name="config-file">elevate.xml</str>
> </searchComponent>
> {code}
> h3. Steps to reproduce:
> (1) Add entries to the elevate.xml of each core to elevate a specific
> document for the text "elevatedTerm
> {code:xml}
> core1:
> <elevate>
> ...
> <query text="elevatedTerm"><doc id="core1docId1" /></query>
> </elevate>
> core2:
> <elevate>
> ...
> <query text="elevatedTerm"><doc id="core2docId1" /></query>
> </elevate>
> {code}
> (2) Execute query (we use port 9983)
> {noformat}
> http://localhost:9983/solr/core1/select?q=elevatedTerm&lowercaseOperators=false&df=text_en&defType=edismax&fq=lang:en&shards=localhost:9983/solr/core1,localhost:9983/solr/core2&fl=[elevated],[shard],area,id&rows=10&start=0
> {noformat}
> As both shards have elevated documents for the requested "elevatedTerm" the
> search results are as expected:
> {noformat}
> response: {
> numFound: 5192,
> start: 0,
> maxScore: 1.9032197,
> docs: [{
> area: "press",
> id: "core1docId1",
> [elevated]: true,
> [shard]: "localhost:9983/solr/core1"
> }, {
> area: "products",
> id: "core2docId1",
> [elevated]: true,
> [shard]: "localhost:9983/solr/core2"
> }, {
> area: "press",
> id: "core1docId2",
> [elevated]: false,
> [shard]: "localhost:9983/solr/core1"
> },
> ...
> {noformat}
> (3) Remove the elevation entry for that "elevatedTerm" from one of the
> cores, e.g. via comment
> {code:xml}
> core2:
> <elevate>
> ...
> <!--
> <query text="elevatedTerm"><doc id="core2docId1" /></query>
> -->
> </elevate>
> {code}
> (4) Reload the modified core:
> [http://localhost:9983/solr/admin/cores?action=RELOAD&core=core2]
> (5) Request same query again and you get the NPE:
> {noformat}
> error: {
> trace: "java.lang.NullPointerException
> at
> org.apache.solr.handler.component.QueryComponent.unmarshalSortValues(QueryComponent.java:1068)
> at
> org.apache.solr.handler.component.QueryComponent.mergeIds(QueryComponent.java:917)
> at
> org.apache.solr.handler.component.QueryComponent.handleRegularResponses(QueryComponent.java:613)
> at
> org.apache.solr.handler.component.QueryComponent.handleResponses(QueryComponent.java:592)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:431)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:2578)
> at
> org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:780)
> at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:566)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:423)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:350)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
> ...
> {noformat}
> When adding the {{sort}} parameter with {{forceElevation=true}} to the query
> then a ClassCastException is thrown
> {noformat}
> http://localhost:9983/solr/core1/select?q=elevatedTerm&lowercaseOperators=false&df=text_en&defType=edismax&fq=lang:en&shards=localhost:9983/solr/core1,localhost:9983/solr/core2&fl=[elevated],[shard],area,id&rows=10&start=0&sort=area%20asc&forceElevation=true{noformat}
> {noformat}
> java.lang.ClassCastException: java.lang.Integer cannot be cast to
> java.lang.String
> at
> org.apache.solr.schema.FieldType.unmarshalStringSortValue(FieldType.java:1229)
> at org.apache.solr.schema.StrField.unmarshalSortValue(StrField.java:122)
> at
> org.apache.solr.handler.component.QueryComponent.unmarshalSortValues(QueryComponent.java:1092)
> at
> org.apache.solr.handler.component.QueryComponent.mergeIds(QueryComponent.java:917)
> at
> org.apache.solr.handler.component.QueryComponent.handleRegularResponses(QueryComponent.java:613)
> at
> org.apache.solr.handler.component.QueryComponent.handleResponses(QueryComponent.java:592)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:431)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:2578)
> at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:780)
> ...
> {noformat}
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