NotSerializableException：java.io.FileInputStream

问题描述

我的应用抛出此错误：

java.rmi.UnmarshalException: error unmarshalling return; nested exception is: 
    java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: java.io.FileInputStream
    at java.rmi/sun.rmi.server.UnicastRef.invoke(UnicastRef.java:194)
    at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:209)
    at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:161)
    at com.sun.proxy.$Proxy40.getEntityBlob(UnkNown Source)
    at com.mycompany.backend.repository.EntityRepositoryImpl.getEntityBlob(EntityRepositoryImpl.java:260)

RMI方法的“客户端”端是这样：

Registry registry = LocateRegistry.getRegistry();
EntityRepository repository =
    (EntityRepository) registry.lookup(EntityRepository.class.getName());
return repository.getEntityBlob(appId,namespace,entityType,entityId,blobKey);

“服务器”端是这个

  public InputStream getEntityBlob(
      String appId,String namespace,String entityType,final String entityId,final String blobKey) throws remoteexception {
    final InputStream[] inputStream = new InputStream[1];
    manager.transactPersistentEntityStore(xodusRoot,appId,true,txn -> {
      EntityId idOfEntity = txn.toEntityId(entityId);
      final Entity entity = txn.getEntity(idOfEntity);
      inputStream[0] = entity.getBlob(blobKey);
    });
    return inputStream[0];
  }

这是否意味着FileInputStream无法与RMI一起使用？还是应该起作用，而我的代码只是一个问题？

解决方法

无法通过RMI传输InputStream

请参阅：Strategy to transmit a stream over RMI

java java rmi