java – Hibernate – 插入大blob的内存不足
发布时间:2020-12-15 02:32:08 所属栏目:Java 来源:网络整理
导读:在POJO我有: public void setBlob(InputStream in,Long l) { this.blob = Hibernate.getLobCreator(SessionFactoryHelper.sessionFactory.getCurrentSession()).createBlob(in,l);} 我在配置中使hibernate.jdbc.use_streams_for_binary为true,但它真的改变
在POJO我有:
public void setBlob(InputStream in,Long l) { this.blob = Hibernate.getLobCreator(SessionFactoryHelper.sessionFactory.getCurrentSession()).createBlob(in,l); } 我在配置中使hibernate.jdbc.use_streams_for_binary为true,但它真的改变了什么吗? 在保存实体时,在session.flush()上我得到: org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release INFO: HHH000010: On release of batch it still contained JDBC statements Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space Heap dump file created [46180174 bytes in 1.662 secs] at java.util.Arrays.copyOf(Arrays.java:2271) at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:113) at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:93) at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:140) at org.hibernate.type.descriptor.java.DataHelper.extractBytes(DataHelper.java:171) at org.hibernate.type.descriptor.java.BlobTypeDescriptor.unwrap(BlobTypeDescriptor.java:121) at org.hibernate.type.descriptor.java.BlobTypeDescriptor.unwrap(BlobTypeDescriptor.java:45) at org.hibernate.type.descriptor.sql.BlobTypeDescriptor$4$1.doBind(BlobTypeDescriptor.java:105) at org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:92) at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:305) at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:300) at org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet(AbstractSingleColumnStandardBasicType.java:57) at org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2599) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2853) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3291) at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:88) at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:354) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:275) at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:326) at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52) at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1127) Hibernate 4.1. 解决方法
我相信问题是你的内存中对象仍然填充了它的字节数组.
这是一个单独的问题,无论是否使用流将其持久保存到数据库. 我建议解决方法:不要将blob存储在POJO中. 然后,当您需要返回blob时,从POJO获取引用并使用基于流的方法将其恢复. 每次需要时获取/保存blob的工作量更大,但如果blob对于内存来说太大,则可能没有其他选择. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |