[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-5534) Regression in 3.5.5: Cascade on merge for Sets fails with transient entities

Regression in 3.5.5: Cascade on merge for Sets fails with transient entities ----------------------------------------------------------------------------- Key: HHH-5534 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5534 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.5.5 Environment: Hibernate 3.5.5, Oracle 10g. Reporter: Kyrill Alyoshin Assignee: Gail Badner Fix For: 3.6.1 Something happened from 3.5.4 to 3.5.5. Here is regression issue we're experiencing after upgrade: We have entities ResearchClientFile and ResearchVendorRecord. RCF maps RVR: @Sort(type = SortType.NATURAL) @OneToMany(mappedBy = "file", fetch = FetchType.LAZY, cascade = CascadeType.ALL) public SortedSet<ResearchVendorRecord> getRecords() { return records; } RVR maps RCF: @ManyToOne(fetch = FetchType.LAZY, optional = false) @JoinColumn(name = "research_client_file_id") public ResearchClientFile getFile() { return file; } The following unit test: ResearchClientFile rcf = RandomUtils.randomBean(ResearchClientFile.class); rcf.addRecord(RandomUtils.randomBean(ResearchVendorRecord.class)); rcf = session.merge(rcf); produces the following exception in 3.5.5 but not in 3.5.4.: java.lang.NullPointerException: null entities are not supported by org.hibernate.event.def.EventCache at org.hibernate.event.def.EventCache.containsKey(EventCache.java:80) at org.hibernate.event.def.DefaultMergeEventListener.mergeTransientEntity(DefaultMergeEventListener.java:361) at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:303) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:258) at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:869) equals, hashCode and compareTo are completely consistent in RVR. The issue seems to affects only Set and SortedSets and on merge only. Lists (with bag semantics) do not appear to be affected on merge.