为什么fechmode.join查询 超时

下面这个方法查询超时，这是为什么？？
@SuppressWarnings("unchecked")
public List<Customer> findAllUseJoin() {
    DetachedCriteria criteria = DetachedCriteria.forClass(Customer.class);  
    criteria.setFetchMode("nodeGroups",FetchMode.JOIN);
criteria.setFetchMode("nodes",FetchMode.JOIN);
criteria.setFetchMode("users",FetchMode.JOIN);
criteria.setFetchMode("usergroups",FetchMode.JOIN);
criteria.setFetchMode("collectorInfos",FetchMode.JOIN);
criteria.setFetchMode("customers",FetchMode.JOIN);
criteria.setFetchMode("mailClients",FetchMode.JOIN);


    return getHibernateTemplate().findByCriteria(criteria);
}
Customer的定义如下：<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="com.dnt.svm.data.ac.Customer" table="ac_customer">
        <id name="customerId" type="java.lang.Integer">
            <column name="customer_id"/>
            <generator class="com.dnt.svm.util.XAssigned"></generator>
        </id>
        <many-to-one name="customer" class="com.dnt.svm.data.ac.Customer" fetch="select" lazy="false">
            <column name="parent_customer_id" />
        </many-to-one>
        <property name="orgId" type="java.lang.String">
            <column name="org_id" length="32" not-null="true" unique="true" />
        </property>
        <property name="contractNo" type="java.lang.String">
            <column name="contract_no" length="50" not-null="true" unique="true" />
        </property>
        <property name="customerName" type="java.lang.String">
            <column name="customer_name" length="45" not-null="true" />
        </property>
        <property name="customerFullname" type="java.lang.String">
            <column name="customer_fullname" />
        </property>
        <property name="customerContact" type="java.lang.String">
            <column name="customer_contact" length="16" />
        </property>
        <property name="customerDes" type="java.lang.String">
            <column name="customer_des" length="45" />
        </property>
        <property name="customerType" type="java.lang.String">
            <column name="customer_type" length="45" />
        </property>
        <property name="customerLegal" type="java.lang.String">
            <column name="customer_legal" />
        </property>
        <property name="customerAddress" type="java.lang.String">
            <column name="customer_address" />
        </property>
        <property name="customerPhone" type="java.lang.String">
            <column name="customer_phone" length="20" />
        </property>
        <property name="customerFax" type="java.lang.String">
            <column name="customer_fax" length="20" />
        </property>
        <property name="customerZip" type="java.lang.String">
            <column name="customer_zip" length="10" />
        </property>
        <property name="customerReserve1" type="java.lang.String">
            <column name="customer_reserve1" length="45" />
        </property>
        <property name="customerReserve2" type="java.lang.String">
            <column name="customer_reserve2" length="45" />
        </property>
        <property name="customerReserve3" type="java.lang.Integer">
            <column name="customer_reserve3" />
        </property>
        <property name="customerSort" type="java.lang.Integer">
            <column name="customer_sort"/>
        </property>
        <set name="customers" inverse="true" lazy="false">
            <key>
                <column name="parent_customer_id" />
            </key>
            <one-to-many class="com.dnt.svm.data.ac.Customer" />
        </set>
        <set name="usergroups" inverse="true" lazy="false">
            <key>
                <column name="customerid" />
            </key>
            <one-to-many class="com.dnt.svm.data.ac.UserGroup" />
        </set>
        <set name="users" inverse="true" lazy="false">
            <key>
                <column name="customer_id" />
            </key>
            <one-to-many class="com.dnt.svm.data.ac.User" />
        </set>
        <set name="nodeGroups" inverse="true" lazy="false">
            <key>
                <column name="customer_id" />
            </key>
            <one-to-many class="com.dnt.svm.data.node.NodeGroup" />
        </set>
<set name="mailClients" inverse="true"  lazy="false">
            <key>
                <column name="customer_id" />
            </key>
            <one-to-many class="com.dnt.svm.data.cfg.MailClient" />
        </set>
        <set name="nodes" inverse="true" lazy="false">
            <key>
                <column name="customer_id" not-null="true" />
            </key>
            <one-to-many class="com.dnt.svm.data.node.Node" />
        </set>
        <set name="collectorInfos" inverse="true" lazy="false">
            <key>
                <column name="customer_id" />
            </key>
            <one-to-many class="com.dnt.svm.data.node.CollectorInfo" />
        </set>
    </class>
</hibernate-mapping>  
hibernatefetchmodejoin超时