Hibernate批量插入数据时错误

Question

如题：报错为：
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at org.postgresql.core.Utils.encodeUTF8(Utils.java:66)
at org.postgresql.core.v3.SimpleParameterList.getV3Length(SimpleParameterList.java:262)
at org.postgresql.core.v3.QueryExecutorImpl.sendBind(QueryExecutorImpl.java:1239)
at org.postgresql.core.v3.QueryExecutorImpl.sendOneQuery(QueryExecutorImpl.java:1506)
at org.postgresql.core.v3.QueryExecutorImpl.sendQuery(QueryExecutorImpl.java:1062)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:398)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2708)
at org.apache.commons.dbcp.DelegatingStatement.executeBatch(DelegatingStatement.java:297)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
at org.hibernate.jdbc.BatchingBatcher.addToBatch(BatchingBatcher.java:34)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2247)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2660)
at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:56)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at sun.reflect.GeneratedMethodAccessor73.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.orm.hibernate3.HibernateTemplate$CloseSuppressingInvocationHandler.invoke(HibernateTemplate.java:1202)
at $Proxy1.flush(Unknown Source)
at fulong.demo.frame.service.impl.XMLInsertImpl$1.doInHibernate(XMLInsertImpl.java:257)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:372)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:338)
at fulong.demo.frame.service.impl.XMLInsertImpl.jdbcInsert(XMLInsertImpl.java:174)
at fulong.demo.frame.bean.Test.main(Test.java:35)
请高手帮忙啊！！！

Answer 1

我的hibernate配置是这样的<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.jdbc.batch_size">50</prop><!--  
<prop key="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</prop>-->
<prop key="hibernate.cache.use_second_level_cash">false</prop>
</props>
</property>存入操作是这样的
final List pipeLinelist = parserBean.getPipelineList();
final List pipeList = parserBean.getPipeList();
String deviceId = parserBean.getDeviceId();
ht.execute(new HibernateCallback(){
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
int count = 0;
Transaction ts = session.beginTransaction();
//加管线
for(int i=0;i<pipeLinelist.size();i++){
Pipeline pipeline = (Pipeline)pipeLinelist.get(i);
pipeline.setDeviceId(deviceId);
session.save(pipeline);

count ++ ;

if(count%50 == 0){
session.flush();
session.clear();
}
}

   //添加管子
for(int i=0;i<pipeList.size();i++){
Pipe pipe = (Pipe)pipeList.get(i);
pipe.setDeviceId(deviceId);
session.save(pipe);
count ++ ;
if(count%50 == 0){
session.flush();
session.clear();
}
}
ts.commit();
session.close();
return null;
}

});

Answer 2

session.save(pipeline);
此行下加
pipeline =new Pipeline ();
session.save(pipe);
此行下加
pipe = new Pipe();

Answer 3

插一定数目，就把 session.clear() 调用一下。数目大的话，会把一级缓存弄爆的。

Answer 4

已经做了session.clear()，就两万多条数据，不多。前几天还用过这段程序插入呢，今天在用就出错了。不知道为什么啊

Answer 5

我对hibernate不是很了解，希望能帮忙解释清楚点，谢了