[hibernate-issues] [Hibernate-JIRA] Closed: (HHH-3178) Disappearing values for a managed Map

Disappearing values for a managed Map ------------------------------------- Key: HHH-3178 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3178 Project: Hibernate3 Issue Type: Bug Affects Versions: 3.2.6 Environment: Hibernate 3.2.6, Microsoft SQL Server 2005 Reporter: Peter Aarestad Assignee: Gail Badner My mapping looks like this (obfuscated but functionally equivalent): {code} <hibernate-mapping package="foo.bar.blah"> <class name="PaperTypes" table="PaperTypes" lazy="false"> <id name="paperTypeId" column="paperTypeID"> <generator class="native" /> </id> <!-- other properties --> <map name="weightsAvailable" table="PaperWeightsAvailable" inverse="true" lazy="false" cascade="all-delete-orphan"> <key column="fk_paperTypeID" /> <map-key-many-to-many class="PaperWeight" column="fk_paperWeightID" /> <one-to-many class="PaperWeightsAvailable" /> </map> </class> </hibernate-mapping> {code} For at least one version of the PaperTypes object, I'm getting an issue where, when you examine the "weightsAvailable" Map, you see that it is paired correctly with a PaperWeightsAvailable object, but get() comes back null. So this code dies: {code} // 'map' is the Hibernate map Map<Integer, Set<Integer>> deflated = new Hashtable<Integer, Set<Integer>>(); Set<PaperWeight> keys = new TreeSet<PaperWeight>(workingMap.keySet()); for (PaperWeight pw : keys) { Set<Integer> set = new TreeSet<Integer>(); // This is where it dies: workingMap.get(pw) should NEVER come back null, but it does sometimes... for (PaperSizes ps : workingMap.get(pw).getSizesAvailable()) { set.add(ps.getPaperSizeId()); } deflated.put(pw.getPaperWeightId(), set); } {code} I worked around this bug by creating a new HashMap based on the Hibernate map: {code} Map<PaperWeight, PaperWeightsAvailable> workingMap = new HashMap<PaperWeight, PaperWeightsAvailable>(map); {code} but that should not be necssarily obviouisly.