@Entity
@Table
@Indexed(index = "archiveinfo")
@Analyzer(impl = jeasy.analysis.MMAnalyzer.class)
public class ArchiveInfo  implements java.io.Serializable {
   @Id
   @DocumentId
   @GeneratedValue
     private Long archId;
    @OneToMany
    @IndexedEmbedded(prefix="efile_", depth=1)
     private Set<Efile> efiles = new HashSet<Efile>();

     @OneToMany
     @IndexedEmbedded(prefix="land_", depth=1)
     private Set<LandAccess> landaccesses = new HashSet<LandAccess>();
     ........
}

@Entity
@Table
@Indexed(index = "efile")
@Analyzer(impl = jeasy.analysis.MMAnalyzer.class)
public class Efile  implements java.io.Serializable {

   @Id
   @DocumentId
   @GeneratedValue
         private Long fileId;

         @ManyToOne
    @ContainedIn
    @IndexedEmbedded(prefix="archive_", depth=1)
         private ArchiveInfo archiveinfo;
         .........
}
@Entity
@Table
@Indexed(index = "landaccess")
@Analyzer(impl = jeasy.analysis.MMAnalyzer.class)
public class LandAccess implements java.io.Serializable {
   
   @Id
   @DocumentId
   @GeneratedValue
   private Long laId;

   @ManyToOne
   @ContainedIn
   @IndexedEmbedded(prefix="archive_", depth=1)
   private ArchiveInfo archiveinfo;
        .........
}

[org.hibernate.transaction.JDBCTransaction]-[ERROR] exception calling user Synchronization
org.hibernate.search.SearchException: Unable to remove from Lucene index: class org.archivebase.mappings.ArchiveInfo#null
   at org.hibernate.search.backend.impl.lucene.LuceneWorker.remove(LuceneWorker.java:109)
   at org.hibernate.search.backend.impl.lucene.LuceneWorker.performWork(LuceneWorker.java:80)
   at org.hibernate.search.backend.impl.lucene.LuceneWorker.performWork(LuceneWorker.java:46)
   at org.hibernate.search.backend.impl.lucene.LuceneBackendQueueProcessor.run(LuceneBackendQueueProcessor.java:98)
   at org.hibernate.search.backend.impl.BatchedQueueingProcessor.performWorks(BatchedQueueingProcessor.java:149)
   at org.hibernate.search.backend.impl.PostTransactionWorkQueueSynchronization.afterCompletion(PostTransactionWorkQueueSynchronization.java:50)
   at org.hibernate.transaction.JDBCTransaction.notifyLocalSynchsAfterTransactionCompletion(JDBCTransaction.java:289)
   at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:152)
   at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:655)
   at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:732)
   at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:701)
   at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321)
   at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
   at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
   at $Proxy28.updateLandAccess(Unknown Source)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at flex.messaging.services.remoting.adapters.JavaAdapter.invoke(JavaAdapter.java:421)
   at flex.messaging.services.RemotingService.serviceMessage(RemotingService.java:183)
   at flex.messaging.MessageBroker.routeMessageToService(MessageBroker.java:1503)
   at flex.messaging.endpoints.AbstractEndpoint.serviceMessage(AbstractEndpoint.java:898)
   at flex.messaging.endpoints.amf.MessageBrokerFilter.invoke(MessageBrokerFilter.java:121)
   at flex.messaging.endpoints.amf.LegacyFilter.invoke(LegacyFilter.java:158)
   at flex.messaging.endpoints.amf.SessionFilter.invoke(SessionFilter.java:44)
   at flex.messaging.endpoints.amf.BatchProcessFilter.invoke(BatchProcessFilter.java:67)
   at flex.messaging.endpoints.amf.SerializationFilter.invoke(SerializationFilter.java:147)
   at flex.messaging.endpoints.BaseHTTPEndpoint.service(BaseHTTPEndpoint.java:278)
   at flex.messaging.MessageBrokerServlet.service(MessageBrokerServlet.java:322)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
   at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.NullPointerException
   at org.apache.lucene.index.TermBuffer.set(TermBuffer.java:78)
   at org.apache.lucene.index.SegmentTermEnum.scanTo(SegmentTermEnum.java:153)
   at org.apache.lucene.index.TermInfosReader.scanEnum(TermInfosReader.java:223)
   at org.apache.lucene.index.TermInfosReader.get(TermInfosReader.java:217)
   at org.apache.lucene.index.SegmentTermDocs.seek(SegmentTermDocs.java:54)
   at org.apache.lucene.index.MultiSegmentReader$MultiTermDocs.termDocs(MultiSegmentReader.java:604)
   at org.apache.lucene.index.MultiSegmentReader$MultiTermDocs.next(MultiSegmentReader.java:555)
   at org.hibernate.search.backend.impl.lucene.LuceneWorker.remove(LuceneWorker.java:99)
   ... 51 more