I have problem with mapping two class
This is my parent class

<hibernate-mapping>
<class name="com.mercer.vo.CommentingAdminContentVO" table="COM_CLIENT_CONTENT">

<composite-id name="commentingAdminContentPK" class ="com.mercer.vo.CommentingAdminContentPK">

<key-property name="clientId" type="java.lang.String">
<column name="CLIENT_ID" />
</key-property>
<key-property name="contentId" type="java.lang.String">
<column name="CONTENT_ID" />
</key-property>
</composite-id>

<property name="contentURL" type="java.lang.String">
<column name="CONTENT_URL" />
</property>


<set name="comSet" inverse="true" cascade="all-delete-orphan" lazy="false" fetch="select" batch-size="5" >
<key>
<column name="CLIENT_ID"/>
<column name="CONTENT_ID"/>
</key>
<one-to-many class="com.mercer.vo.CommentingContentModeratorVO" />
</set>
</class>

</hibernate-mapping>


This is child class

<hibernate-mapping>
<class name="com.mercer.vo.CommentingContentModeratorVO" table="COM_CONTENT_MODERATOR" >
<cache usage="read-only" include="all" />

<id name="id" type="java.lang.Long">
<column name="ID_CONTENT_MODERATOR" />
<generator class="increment" />
</id>

<property name="clientId" type="java.lang.String">
<column name="CLIENT_ID" />
</property>
<property name="contentId" type="java.lang.String">
<column name="CONTENT_ID" />
</property>
<property name="moderatorId" type="java.lang.String">
<column name="MODERATOR_ID" />
</property>

</class>
</hibernate-mapping>

Parent class is mapped to child class with one-many relation.
Mapped Column is composite key.

When I am trying to delete parent record, it gets deleted but child records associated with parent are not getting deleted. Also, There are no exceptions thrown in back end.

I have tried with all-delete-orphan option in mapping set.
Can anybody help on it?