I have obj which has set in it.
Code is updating set with addition and removal of objects. Adding works fine with database but remove element from collection and calling save is not deleting element from db. I am not getting any exception too.

Code is as follows:

Set<Organization> currentOrgs = center.getOrgs();
Organization org = orgDAO.getOrg(10); //this org exists in currentOrgs.
currentOrgs.remove(org);
centerDAO.update(currentOrgs);

hbm mapping contains many to many relation

<set name="orgs" inverse="true" table="dbo.ORG">
<key>
<column name="CENTER_ID" not-null="true"/>
</key>

<many-to-many entity-name="com.planner.db.Organization">
<column name="ORG_ID" not-null="true"/>
</many-to-many>
</set>

Thanks in advance.

What about setting up a CascadeType of ALL with DELETE ORPHAN?

It worked setting inverse = false

Thank you for your help.