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DubboService 和 @Transactional 一起配置事务失效
Environment
- Dubbo version: 3.0.10
- Operating System version: win7
- Java version: 1.8
Steps to reproduce this issue
@SpringBootApplication(exclude = DruidDataSourceAutoConfigure.class)
@Slf4j
@EnableJpaRepositories(basePackages = "com.xiushang") //用于扫描Dao @Repository
@EntityScan("com.xiushang.entity") //用于扫描JPA实体类 @Entity
@ServletComponentScan(basePackages = {"com.xiushang.filter"})
@EnableRedisHttpSession
@EnableDubbo
@EnableTransactionManagement(proxyTargetClass = true)
public class AdminApplication extends SpringBootServletInitializer {
public static void main(String[] args) throws Exception {
ConfigurableApplicationContext application = SpringApplication.run(AdminApplication.class, args);
}
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(AdminApplication.class);
}
}
@DubboService(interfaceClass=CustomService.class,filter = "userFilter",retries = 0)
public class CustomServiceImpl extends BaseServiceImpl<CustomEntity> implements CustomService {
@Transactional(readOnly = true)
public PageTableVO findPageList(CustomSearchVo searchPageVo) {
...
Page<CustomEntity> page = findPageList(ex, searchPageVo.createPageRequest(new Sort.Order(dir, "lastContactDate")));
LazyLoadUtil.fullLoad(page);
PageTableVO vo = new PageTableVO(page, searchPageVo);
return vo;
}
}
代码使用了JPA，CustomEntity 中有延迟加载的属性，因此需要session
Expected Behavior
能正常返回，并延迟加载 CustomEntity中所有属性
Actual Behavior
could not initialize proxy - no Session
If there is an exception, please attach the exception trace:
amic=true, service.filter=userFilter, anyhost=true},}, cause: org.apache.dubbo.remoting.RemotingException: Failed to send response: Response [id=6, version=2.0.2, status=20, event=false, error=null, result=AppResponse [value=com.xiushang.framework.entity.vo.PageTableVO@6fc8a7cf, exception=null]], cause: java.lang.RuntimeException: failed to lazily initialize a collection of role: com.xiushang.entity.shop.ShopEntity.images, could not initialize proxy - no Session Java field: private java.util.List com.xiushang.entity.shop.ShopEntity.images
Java field: private com.xiushang.entity.shop.ShopEntity com.xiushang.entity.custom.CustomGroupEntity.belongShop
Java field: private java.util.List com.xiushang.entity.custom.CustomEntity.groupList
Java field: private java.util.List com.xiushang.framework.entity.vo.PageTableVO.rowData
java.lang.RuntimeException: failed to lazily initialize a collection of role: com.xiushang.entity.shop.ShopEntity.images, could not initialize proxy - no Session
Java field: private java.util.List com.xiushang.entity.shop.ShopEntity.images
Java field: private com.xiushang.entity.shop.ShopEntity com.xiushang.entity.custom.CustomGroupEntity.belongShop
Java field: private java.util.List com.xiushang.entity.custom.CustomEntity.groupList
Java field: private java.util.List com.xiushang.framework.entity.vo.PageTableVO.rowData
at com.alibaba.com.caucho.hessian.io.JavaSerializer$FieldSerializer.serialize(JavaSerializer.java:304)
at com.alibaba.com.caucho.hessian.io.JavaSerializer.writeInstance(JavaSerializer.java:284)
at com.alibaba.com.caucho.hessian.io.JavaSerializer.writeObject(JavaSerializer.java:251)
at com.alibaba.com.caucho.hessian.io.Hessian2Output.writeObject(Hessian2Output.java:412)
at org.apache.dubbo.common.serialize.hessian2.Hessian2ObjectOutput.writeObject(Hessian2ObjectOutput.java:92)
at org.apache.dubbo.rpc.protocol.dubbo.DubboCodec.encodeResponseData(DubboCodec.java:225)
at org.apache.dubbo.remoting.exchange.codec.ExchangeCodec.encodeResponse(ExchangeCodec.java:309)
at org.apache.dubbo.remoting.exchange.codec.ExchangeCodec.encode(ExchangeCodec.java:73)
at org.apache.dubbo.rpc.protocol.dubbo.DubboCountCodec.encode(DubboCountCodec.java:47)
at org.apache.dubbo.remoting.transport.netty4.NettyCodecAdapter$InternalEncoder.encode(NettyCodecAdapter.java:69)
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702)
请问最新版本dubbo 不是已经解决了DubboService 和 @Transactional 的问题吗，我是缺少了什么配置吗
这个和 Dubbo 没啥关系，是你的 com.xiushang.framework.entity.vo.PageTableVO 不支持 @transactional
https://stackoverflow.com/questions/11746499/how-to-solve-the-failed-to-lazily-initialize-a-collection-of-role-hibernate-ex 看一下这篇呢
我感觉不会是延迟加载问题，LazyLoadUtil.fullLoad(page); 方法应该已经加载了
@DubboService(interfaceClass=CustomService.class,filter = "userFilter",retries = 0)
public class CustomServiceImpl extends BaseServiceImpl<CustomEntity> implements CustomService {
@Transactional(readOnly = true)
public PageTableVO findPageList(CustomSearchVo searchPageVo) {
...
Page<CustomEntity> page = findPageList(ex, searchPageVo.createPageRequest(new Sort.Order(dir, "lastContactDate")));
//请注意下面这行代码
LazyLoadUtil.fullLoad(page);
PageTableVO vo = new PageTableVO(page, searchPageVo);
return vo;
}
}
public class LazyLoadUtil {
public synchronized static void fullLoad(Object object) {
if(object == null)
return;
JSON.toJSONString(object, new LazyLoadFilter());
}
}
我感觉不会是延迟加载问题，LazyLoadUtil.fullLoad(page); 方法应该已经加载了
@DubboService(interfaceClass=CustomService.class,filter = "userFilter",retries = 0) public class CustomServiceImpl extends BaseServiceImpl<CustomEntity> implements CustomService { @Transactional(readOnly = true) public PageTableVO findPageList(CustomSearchVo searchPageVo) { ... Page<CustomEntity> page = findPageList(ex, searchPageVo.createPageRequest(new Sort.Order(dir, "lastContactDate"))); //请注意下面这行代码 LazyLoadUtil.fullLoad(page); PageTableVO vo = new PageTableVO(page, searchPageVo); return vo; } } public class LazyLoadUtil { public synchronized static void fullLoad(Object object) { if(object == null) return; JSON.toJSONString(object, new LazyLoadFilter()); } }
看报错是在返回的时候了，可以 debug 看下