error HibernateException  in deleting the records Could not execute JDBC batch update
org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update
        at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
        at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
        at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:179)
        at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:72)
        at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:67)
        at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:148)
        at org.hibernate.persister.collection.AbstractCollectionPersister.remove(AbstractCollectionPersister.java:809)
        at org.hibernate.action.CollectionRemoveAction.execute(CollectionRemoveAction.java:22)
        at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:239)
        at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:223)
        at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:138)
        at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:274)
        at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
        at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:678)
        at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:309)
        at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:86)
        at com.uprr.app.eco.DeleteOldData.deleteOldData(DeleteOldData.java:163)
        at com.uprr.app.eco.DeleteOldData.main(DeleteOldData.java:190)
Caused by: java.sql.BatchUpdateException: ORA-01407: cannot update ("ECO"."ECO_HZRD_EMGY_RESP"."STCC_CODE") to NULL

        at oracle.jdbc.driver.DatabaseError.throwBatchUpdateException(DatabaseError.java:367)
        at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:8726)
        at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1722)
        at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:57)
        at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:172)

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<!--
        Auto-generated mapping file from
        the hibernate.org cfg2hbm engine
-->
    <class name="com.uprr.app.eco.persistenceDelete.EcoCmdyDelete" table="ECO_CMDY" schema="ECO">
        <id name="stccCode" type="string">
            <column name="STCC_CODE" length="7" />
            <generator class="assigned" />
        </id>       
        <property name="hzrdInd" type="string">
            <column name="HZRD_IND" length="1" />
        </property>
        <property name="effDate" type="date">
            <column name="EFF_DATE" length="7" />
        </property>
        <property name="cmdyAbrv" type="string">
            <column name="CMDY_ABRV" length="6" />
        </property>
        <property name="intlHmzdCode" type="string">
            <column name="INTL_HMZD_CODE" length="6" />
        </property>
        <property name="svcRqmtCode1" type="string">
            <column name="SVC_RQMT_CODE_1" length="1" />
        </property>
        <property name="svcRqmtCode2" type="string">
            <column name="SVC_RQMT_CODE_2" length="1" />
        </property>
        <property name="svcRqmtCode3" type="string">
            <column name="SVC_RQMT_CODE_3" length="1" />
        </property>
        <property name="wgtTolrFctr" type="integer">
            <column name="WGT_TOLR_FCTR" precision="1" scale="0" />
        </property>
        <property name="cmdyBaseNbr" type="short">
            <column name="CMDY_BASE_NBR" precision="3" scale="0" />
        </property>
        <property name="unnaNbr" type="string">
            <column name="UNNA_NBR" length="6" />
        </property>
        <property name="crtnDt" type="date">
            <column name="CRTN_DT" length="7" not-null="true" />
        </property>
        <property name="crtnUserId" type="string">
            <column name="CRTN_USER_ID" length="8" not-null="true" />
        </property>
        <property name="lastUptdDt" type="timestamp">
            <column name="LAST_UPTD_DT" length="7" not-null="true" />
        </property>
        <property name="lastUptdUserId" type="string">
            <column name="LAST_UPTD_USER_ID" length="8" not-null="true" />
        </property>
        <property name="cmdyDesc" type="string">
            <column name="CMDY_DESC" length="720" />
        </property>
       <!-- <property name="prodClassStcc" type="string">
         <column name="PROD_CLAS_STCC_CODE" length="7" />
      </property> -->
       
        <set name="ecoHzrdEmgyResps" cascade="delete-orphan" >
            <key>
                <column name="STCC_CODE" length="7" not-null="true" />
            </key>
            <one-to-many class="com.uprr.app.eco.persistenceDelete.EcoHzrdEmgyRespDelete" />
        </set>
       
        <set name="ecoCommodities" cascade="delete-orphan">
               <key>
                   <column name="PROD_CLAS_STCC_CODE" length="7"  />
               </key>
               <one-to-many class="com.uprr.app.eco.persistenceDelete.EcoCmdyDelete" />
        </set>
       
        <set name="ecoHzmtDtls" cascade="delete-orphan">
            <key>
                <column name="STCC_CODE" length="7" not-null="true" />
            </key>
            <one-to-many class="com.uprr.app.eco.persistenceDelete.EcoHzmtDtlDelete" />
        </set>
        <set name="ecoHzmtNameDescs" cascade="delete-orphan" >
            <key>
                <column name="STCC_CODE" length="7" not-null="true" />
            </key>
            <one-to-many class="com.uprr.app.eco.persistenceDelete.EcoHzmtNameDescDelete" />
        </set>
    </class>
</hibernate-mapping>




<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<!--
        Auto-generated mapping file from
        the hibernate.org cfg2hbm engine
-->
    <class name="com.uprr.app.eco.persistenceDelete.EcoHzrdEmgyRespDelete" table="ECO_HZRD_EMGY_RESP" schema="ECO">
        <composite-id name="id" class="com.uprr.app.eco.persistenceDelete.EcoHzrdEmgyRespId">
            <key-property name="stccCode" type="string">
                <column name="STCC_CODE" length="7" />
            </key-property>
            <key-property name="lineNbr" type="int">
                <column name="LINE_NBR" precision="2" scale="0" />
            </key-property>
        </composite-id>
        <many-to-one name="ecoCmdy" class="com.uprr.app.eco.persistenceDelete.EcoCmdyDelete" update="false" insert="false" fetch="select">
            <column name="STCC_CODE" length="7" not-null="true" />
        </many-to-one>
        <property name="crtnDt" type="date">
            <column name="CRTN_DT" length="7" not-null="true" />
        </property>
        <property name="crtnUserId" type="string">
            <column name="CRTN_USER_ID" length="8" not-null="true" />
        </property>
        <property name="lastUptdDt" type="date">
            <column name="LAST_UPTD_DT" length="7" not-null="true" />
        </property>
        <property name="lastUptdUserId" type="string">
            <column name="LAST_UPTD_USER_ID" length="8" not-null="true" />
        </property>
        <property name="emgyRespText" type="string">
            <column name="EMGY_RESP_TEXT" length="80" not-null="true" />
        </property>
    </class>
</hibernate-mapping>


<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<!--
        Auto-generated mapping file from
        the hibernate.org cfg2hbm engine
-->
    <class name="com.uprr.app.eco.persistenceDelete.EcoHzmtNameDescDelete" table="ECO_HZMT_NAME_DESC"  schema="ECO">
        <composite-id name="id" class="com.uprr.app.eco.persistenceDelete.EcoHzmtNameDescId">
            <key-property name="stccCode" type="string">
                <column name="STCC_CODE" length="7" />
            </key-property>
            <key-property name="regAuthCode" type="string">
                <column name="REG_AUTH_CODE" length="1" />
            </key-property>
            <key-property name="nameDescType"  type="string">
                <column name="NAME_DESC_TYPE" length="4" />
            </key-property>
            <key-property name="grpNbr" type="byte">
                <column name="GRP_NBR" precision="2" scale="0" />
            </key-property>
            <key-property name="lineNbr" type="byte">
                <column name="LINE_NBR" precision="2" scale="0" />
            </key-property>
        </composite-id>
        <many-to-one name="ecoHzmtDescLine" class="com.uprr.app.eco.persistenceDelete.EcoHzmtDescLineDelete" fetch="select">
            <column name="NAME_DESC_ID" precision="10" scale="0" not-null="true" />
        </many-to-one>
        <many-to-one name="ecoCmdy" class="com.uprr.app.eco.persistenceDelete.EcoCmdyDelete" update="false" insert="false" fetch="select">
            <column name="STCC_CODE" length="7" not-null="true" />
        </many-to-one>
        <property name="primInd"  type="string">
            <column name="PRIM_IND" length="1" />
        </property>
        <property name="crtnDt" type="date">
            <column name="CRTN_DT" length="7" not-null="true" />
        </property>
        <property name="crtnUserId" type="string">
            <column name="CRTN_USER_ID" length="8" not-null="true" />
        </property>
        <property name="lastUptdDt" type="date">
            <column name="LAST_UPTD_DT" length="7" not-null="true" />
        </property>
        <property name="lastUptdUserId" type="string">
            <column name="LAST_UPTD_USER_ID" length="8" not-null="true" />
        </property>
    </class>
</hibernate-mapping>



<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<!--
        Auto-generated mapping file from
        the hibernate.org cfg2hbm engine
-->
    <class name="com.uprr.app.eco.persistenceDelete.EcoHzmtDescLineDelete" table="ECO_HZMT_DESC_LINE" schema="ECO">
        <id name="nameDescId" type="long">
            <column name="NAME_DESC_ID" precision="10" scale="0" />
            <generator class="assigned" />
        </id>
        <property name="hzmtNameDesc" type="string">
            <column name="HZMT_NAME_DESC" length="25" not-null="true" />
        </property>
        <property name="crtnDt" type="date">
            <column name="CRTN_DT" length="7" not-null="true" />
        </property>
        <property name="crtnUserId" type="string">
            <column name="CRTN_USER_ID" length="8" not-null="true" />
        </property>
        <set name="ecoHzmtNameDescs" inverse="true">
            <key>
                <column name="NAME_DESC_ID" precision="10" scale="0" not-null="true" />
            </key>
            <one-to-many class="com.uprr.app.eco.persistenceDelete.EcoHzmtNameDescDelete" />
        </set>
    </class>
</hibernate-mapping>