'java.lang.AssertionError: Nested calls to partialFlushStart' in Hibernate

Issue

• During a query, flush is triggered to ensure the database contains any pending changes that might be relevant to the query.
• During the flush, an application registered findDirty listener callback triggers a second query (e.g. due to access of a lazily loaded entity) that also initiates a flush cycle.

• The nested flush attempt fails with an AssertionError.

  ... WFLYEJB0034: EJB Invocation failed on component SystemConfigurationServiceBean for method ...: javax.ejb.EJBTransactionRolledbackException: WFLYEJB0457: Unexpected Error
          ...
          at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:93)
          at org.hibernate.internal.SessionImpl.fireLoadNoChecks(SessionImpl.java:1277)
          at org.hibernate.internal.SessionImpl.immediateLoad(SessionImpl.java:1119)
          at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:178)
          at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:309)
          at org.hibernate.proxy.pojo.bytebuddy.ByteBuddyInterceptor.intercept(ByteBuddyInterceptor.java:45)
          ...
          at org.custom.MyEntity.getString(MyEntity.java:88)
          at org.custom.MyListener.findDirty(MyListener.java:99)
          at org.hibernate.event.internal.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:514)
          at org.hibernate.event.internal.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:239)
          at org.hibernate.event.internal.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:166)
          at org.hibernate.event.internal.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:235)
          at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:94)
          at org.hibernate.event.internal.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:46)
          at org.hibernate.internal.SessionImpl.autoFlushIfRequired(SessionImpl.java:1433)
          at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1519)
          at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1538)
          at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1506)
          at org.hibernate.query.Query.getResultList(Query.java:132)
          ...
  Caused by: java.lang.AssertionError: Nested calls to partialFlushStart
          at org.hibernate.engine.internal.StatisticalLoggingSessionEventListener.partialFlushStart(StatisticalLoggingSessionEventListener.java:241)
          at org.hibernate.engine.internal.SessionEventListenerManagerImpl.partialFlushStart(SessionEventListenerManagerImpl.java:225)
          at org.hibernate.event.internal.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:39)
          at org.hibernate.internal.SessionImpl.autoFlushIfRequired(SessionImpl.java:1433)
          at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1519)
          at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1538)
          at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1506)
          at org.hibernate.query.Query.getResultList(Query.java:132)
          ...