I am trying to load an entity and it results in out of memory exception.

Here is my case:
I have Entity A which has 1-2-many relationship with Entity B.
Entity B has 1-2-many relationship with Entity C.

I have added filter conditions in Entity A's hbm to load only those entities whoes id matches with id passed.

I also have lazy="true" for Entity B and C.
Bellow is the mapping files.

Entity A
<hibernate-mapping>
<class name="Entity A" table="TABLE1">
<id name="id" type="long">
<column name="ID" scale="0" />
<generator class="assigned" />
</id>
<property name="name" type="string">
<column name="NAME" length="64" not-null="true" />
</property>
<property name="Number" type="string">
<column name="NUMBER" length="2048" />
</property>

<list name="entityb"
table="TABLE2"
lazy="true"
inverse="false"
outer-join="false"
>
<key column="ID"/>
<list-index column="id"/>
<one-to-many class="Entity B"/>
<filter name="filter1" condition=":id = ID" />
</list>
</class>
<filter-def name="filter1">
<filter-param name="id" type="long"/>
</filter-def>
</hibernate-mapping>

Entity B
<hibernate-mapping>
<class name="Entity B" table="TABLE2">
<id name="id" type="long">
<column name="ID" scale="0" />
<generator class="assigned" />
</id>

<property name="status" type="string">
<column name="STATUS" not-null="true" />
</property>

<list name="entityc"
table="TABLE3"
lazy="true"
inverse="false"
outer-join="false"
>
<key column="ID"/>
<list-index column="id"/>
<one-to-many class="ENTITY C"/>
</list>

<many-to-one
name="entityA"
class="ENTITY A"
cascade="none"
outer-join="false"
column="ID"
not-null="true"
/>
</class>

</hibernate-mapping>

Entity C
<hibernate-mapping>
<class name="ENTITY C" table="TABLE3">
<id name="id" type="long">
<column name="ID" scale="0" />
<generator class="assigned" />
</id>

<many-to-one
name="entityb"
class="ENTITY B"
cascade="none"
outer-join="false"
column="ID"
not-null="true"
/>
</class>
</hibernate-mapping>

Any idea whats going wrong.