This iterator can only move forward. Assertion error

Hi folks!
I need help with composite sort.
Here’s my situation.

I use:

  • Hibernate search 7.1.1.Final
  • Lucene backend
  • Mapper ORM

My entities structure:

@Indexed public class SourceModel { @Id @Column(name = "id", nullable = false) @JdbcTypeCode(SqlTypes.BIGINT) @GenericField(name = "idSort", sortable = Sortable.YES) private Long id; @FullTextField(name = "title", analyzer = "stop") @KeywordField(name = "titleSort", sortable = Sortable.YES, normalizer = "lowercase") @Column(name = "title") private String title; //My data is not updated after creation. //I do not need reindexing on update @IndexedEmbedded(structure = ObjectStructure.NESTED) @IndexingDependency(reindexOnUpdate = ReindexOnUpdate.SHALLOW) @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true) @JoinColumn(name = "source_id") private List<CalculationModel> calculations; @IndexedEmbedded(structure = ObjectStructure.NESTED) @IndexingDependency(reindexOnUpdate = ReindexOnUpdate.SHALLOW) @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true) @JoinColumn(name = "source_id") private List<SourceMetricModel> sourceMetrics; } 
@Indexed public class CalculationModel { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "id", nullable = false) @JdbcTypeCode(SqlTypes.BIGINT) private Long id; @GenericField(indexNullAs = "0") @Column(name = "calc_year") private Integer year; @GenericField(sortable = Sortable.YES, indexNullAs = "0") @Column(name = "citescore") private Float citeScore; @GenericField(indexNullAs = "0") @Column(name = "source_id") private Long sourceId; } 
@Indexed public class SourceMetricModel { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "id", nullable = false) @JdbcTypeCode(SqlTypes.BIGINT) private Long id; @GenericField(indexNullAs = "0") @Column(name = "source_id") private Long sourceId; @GenericField(indexNullAs = "0") @Column(name = "cov_year") private Integer year; @GenericField(name = "sjr", sortable = Sortable.YES, indexNullAs = "0") @Column(name = "sjr_value") private Float sjrValue; } 

Here comes a strange (at least for me) situation.
When I perform search and sort like this, everything works perfectly

public SearchResult<SourceModel> getYearlyMetrics(YearlyMetricsRequest request) { return searchSession.search(SourceModel.class) .where(f -> f.match().field("calculations.year").matching(request.getYear())) .sort( sort -> sort.field("calculations.citeScore").asc() .filter(f -> f.match().field("calculations.year").matching(request.getYear())) .then().field("titleSort").asc() ) .fetch(0, 100); } 

BUT!!! When I try to do this (which is hierarchically is exactly the same and has the same types of data),

public SearchResult<SourceModel> getYearlyMetrics(YearlyMetricsRequest request) { return searchSession.search(SourceModel.class) .where(f -> f.match().field("calculations.year").matching(request.getYear())) .sort( sort -> sort.field("sourceMetrics.sjr").asc() .filter(f -> f.match().field("sourceMetrics.year").matching(request.getYear())) .then().field("titleSort").asc() ) .fetch(0, 100); } 

I get an exception

org.hibernate.search.util.common.AssertionFailure: This iterator can only move forward (no advancing to the same doc twice, no going backward) -- this may indicate a bug or a missing test in Hibernate Search. 

Full stacktrace:

org.hibernate.search.util.common.AssertionFailure: This iterator can only move forward (no advancing to the same doc twice, no going backward) -- this may indicate a bug or a missing test in Hibernate Search. Please report it: https://hibernate.org/community/	at org.hibernate.search.backend.lucene.lowlevel.join.impl.ChildDocIds.advanceExactParent(ChildDocIds.java:40)	at org.hibernate.search.backend.lucene.lowlevel.docvalues.impl.DoubleMultiValuesToSingleValuesSource$2.advanceExact(DoubleMultiValuesToSingleValuesSource.java:154)	at org.hibernate.search.backend.lucene.lowlevel.docvalues.impl.NumericDoubleValues$RawNumericDocValues.advanceExact(NumericDoubleValues.java:99)	at org.apache.lucene.search.comparators.FloatComparator$FloatLeafComparator.getValueForDoc(FloatComparator.java:70)	at org.apache.lucene.search.comparators.FloatComparator$FloatLeafComparator.copy(FloatComparator.java:95)	at org.apache.lucene.search.MultiLeafFieldComparator.copy(MultiLeafFieldComparator.java:84)	at org.apache.lucene.search.TopFieldCollector$TopFieldLeafCollector.collectCompetitiveHit(TopFieldCollector.java:115)	at org.apache.lucene.search.TopFieldCollector$SimpleFieldCollector$1.collect(TopFieldCollector.java:207)	at org.apache.lucene.search.ConjunctionBulkScorer.score(ConjunctionBulkScorer.java:171)	at org.apache.lucene.search.BulkScorer.score(BulkScorer.java:38)	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:769)	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:554)	at org.hibernate.search.backend.lucene.search.extraction.impl.LuceneCollectors.collectMatchingDocs(LuceneCollectors.java:96)	at org.hibernate.search.backend.lucene.search.query.impl.LuceneSearcherImpl.collectMatchingDocs(LuceneSearcherImpl.java:142)	at org.hibernate.search.backend.lucene.search.query.impl.LuceneSearcherImpl.doSearch(LuceneSearcherImpl.java:98)	at org.hibernate.search.backend.lucene.search.query.impl.LuceneSearcherImpl.search(LuceneSearcherImpl.java:75)	at org.hibernate.search.backend.lucene.search.query.impl.LuceneSearcherImpl.search(LuceneSearcherImpl.java:32)	at org.hibernate.search.backend.lucene.work.impl.SearchWork.execute(SearchWork.java:41)	at org.hibernate.search.backend.lucene.orchestration.impl.LuceneSyncWorkOrchestratorImpl$WorkExecution.execute(LuceneSyncWorkOrchestratorImpl.java:156)	at org.hibernate.search.backend.lucene.orchestration.impl.LuceneSyncWorkOrchestratorImpl.doSubmit(LuceneSyncWorkOrchestratorImpl.java:90)	at org.hibernate.search.backend.lucene.orchestration.impl.LuceneSyncWorkOrchestratorImpl.doSubmit(LuceneSyncWorkOrchestratorImpl.java:33)	at org.hibernate.search.engine.backend.orchestration.spi.AbstractWorkOrchestrator.submit(AbstractWorkOrchestrator.java:139)	at org.hibernate.search.backend.lucene.orchestration.impl.LuceneSyncWorkOrchestratorImpl.submit(LuceneSyncWorkOrchestratorImpl.java:59)	at org.hibernate.search.backend.lucene.orchestration.impl.LuceneSyncWorkOrchestrator.submit(LuceneSyncWorkOrchestrator.java:27)	at org.hibernate.search.backend.lucene.search.query.impl.LuceneSearchQueryImpl.doSubmit(LuceneSearchQueryImpl.java:202)	at org.hibernate.search.backend.lucene.search.query.impl.LuceneSearchQueryImpl.doFetch(LuceneSearchQueryImpl.java:177)	at org.hibernate.search.backend.lucene.search.query.impl.LuceneSearchQueryImpl.fetch(LuceneSearchQueryImpl.java:99)	at org.hibernate.search.backend.lucene.search.query.impl.LuceneSearchQueryImpl.fetch(LuceneSearchQueryImpl.java:40)	at org.hibernate.search.engine.search.query.dsl.spi.AbstractSearchQueryOptionsStep.fetch(AbstractSearchQueryOptionsStep.java:203)	at com.elsevier.kd.repository.fts.YearlyMetricsFtsRepository.getYearlyMetrics(YearlyMetricsFtsRepository.java:23)	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)	at java.base/java.lang.reflect.Method.invoke(Method.java:580)	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:355)	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768)	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:138)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768)	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:720)	at com.elsevier.kd.repository.fts.YearlyMetricsFtsRepository$$SpringCGLIB$$0.getYearlyMetrics(<generated>)	at com.elsevier.kd.service.YearlyMetricsService.getYearlyMetrics(YearlyMetricsService.java:26)	at com.elsevier.kd.controller.YearlyMetricsController.search(YearlyMetricsController.java:22)	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)	at java.base/java.lang.reflect.Method.invoke(Method.java:580)	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:255)	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:188)	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:926)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:831)	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089)	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979)	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:914)	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:590)	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:195)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at org.springframework.web.filter.AbstractRequestLoggingFilter.doFilterInternal(AbstractRequestLoggingFilter.java:289)	at com.elsevier.kd.appweb.filter.TraceFilter.doFilterInternal(TraceFilter.java:61)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at com.elsevier.kd.appweb.filter.TrailingSlashRedirectFilter.doFilter(TrailingSlashRedirectFilter.java:30)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at com.elsevier.kd.appweb.filter.logging.LoggingFilter.doFilterInternal(LoggingFilter.java:50)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at org.springframework.web.filter.ServerHttpObservationFilter.doFilterInternal(ServerHttpObservationFilter.java:113)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:384)	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:904)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1741)	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)	at java.base/java.lang.VirtualThread.run(VirtualThread.java:329) 

What am I doing wrong here?
Thank you all in advance!

This can be deleted as it basically duplicates my following post

Sorry for unintentional flood posting