Created by: TomorrowIsAnOtherDay

Paddle 版本：1.5.1 背景：复现算法COMA，multi-aget算法 详细错误提示：

error 1:

code:

    def learn(self, obs, actions, last_actions, q_vals, lr):
        """
        Args:
            obs: [4*env*batch,time,84]
            actions: [4*env*batch,time,1]
            last_actions: [4*env*batch,time,1]
            q_vals:[env*batch,4,time,22]
            lr: float scalar of learning rate.
        """
        mac_out = []
        hidden_state = None
        pre_cell = None
        obs_batch = self._build_actor_inputs(obs, last_actions)  # [4*env*batch,time,106]
        for t in range(obs_batch.shape[1]):
            obs_ = layers.slice(obs_batch, axes=[1], starts=[t], ends=[t + 1])  # [4*env*batch,106]
            if hidden_state is None:
                hidden_state, pre_cell = self.model.init_hidden_state(obs_)  # [4*env*batch,64]
            logits, hidden_state, pre_cell = self.model.policy(obs_, hidden_state, pre_cell)  # [4*env*batch, 22]
            mac_out.append(logits)  # [times,4*env*batch, 22]
        mac_out = layers.stack(mac_out, axis=1)  # [4*env*batch,time,22]

        # Calculated baseline

        q_vals = layers.reshape(q_vals, [-1, self.action_dim])  # [4*env*batch*(time),22]
        pi = layers.reshape(mac_out, [-1, self.action_dim])  # [4*env*batch*(time),22]
        baseline = layers.reduce_sum(pi * q_vals, dim=-1, keep_dim=True)  # [4*env*batch*(time),1]

        # Calculate policy grad
        actions_for_one_hot = layers.reshape(actions, [-1, 1])  # [4*env*batch*(time),1]
        actions_one_hot = layers.one_hot(actions_for_one_hot, self.action_dim)  # [4*env*batch*(time),22]
        q_taken = layers.reduce_sum(actions_one_hot * q_vals, dim=-1, keep_dim=True)  # [4*env*batch*(time),1]
        pi_taken = layers.reduce_sum(actions_one_hot * pi, dim=-1, keep_dim=True)  # [4*env*batch*time,1]
        log_pi_taken = layers.log(pi_taken)  # [4*env*batch*time,1]

        advantages = (q_taken - baseline)
        coma_loss = layers.reduce_sum(advantages * log_pi_taken)  # [1]

        # Optimise agents
        fluid.clip.set_gradient_clip(
            clip=fluid.clip.GradientClipByGlobalNorm(clip_norm=self.grad_norm_clip))

        optimizer = fluid.optimizer.RMSPropOptimizer(lr, rho=self.optim_alpha, epsilon=self.optim_eps)
        optimizer.minimize(coma_loss) # error
        return coma_loss

error

line 300, in learn optimizer.minimize(total_loss) File "", line 2, in minimize File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/wrapped_decorator.py", line 25, in impl return wrapped_func(*args, **kwargs) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/dygraph/base.py", line 87, in impl return func(*args, **kwargs) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/optimizer.py", line 594, in minimize no_grad_set=no_grad_set) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/optimizer.py", line 493, in backward no_grad_set, callbacks) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/backward.py", line 578, in append_backward append_backward_vars(root_block, fwd_op_num, grad_to_var, grad_info_map) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/backward.py", line 392, in append_backward_vars op_desc.infer_shape(block.desc) paddle.fluid.core_avx.EnforceNotMet: Input(C@GRAD) should not be null at [/home/teamcity/work/ef54dc8a5b211854/paddle/fluid/operators/lstm_unit_op.cc:88]

error two:

code

def _train_critic(self, obs, actions, last_actions, rewards, targets, lr_critic):
     """
     :param obs: [4*env*batch,time,84]
     :param actions: [4*env*batch,time,1]
     :param last_actions: [4*env*batch,time,1]
     :param rewards: [env*batch,time]
     :param targets: [env*batch,4,time]
     :return: q_vals, critic_train_stats [env*batch,4,time,22]
     """
     # init state
     batch = self._build_critic_inputs(obs, actions, last_actions)  # [env*batch,time,452]
     actions_one_hot = layers.one_hot(actions, self.action_dim)  # [4*env*batch,time,22]
     actions_one_hot = layers.reshape(actions_one_hot, [-1, 4, batch.shape[-2], self.action_dim])  # [env*batch,4,time,22]

     # Optimise agents
     fluid.clip.set_gradient_clip(
         clip=fluid.clip.GradientClipByGlobalNorm(clip_norm=self.grad_norm_clip))

     optimizer = fluid.optimizer.RMSPropOptimizer(lr_critic, rho=self.optim_alpha, epsilon=self.optim_eps)

     critic_train_stats = {
         "critic_loss": [],
         "td_error_abs": [],
         "target_mean": [],
         "q_taken_mean": []
     }

     q_vals_list = []
     for t in range(rewards.shape[1]):  # time
         obs_ = batch[:, t]  # [env*batch,452]
         q_t = self.model.value(obs_)  # [env*batch,22]
         q_t = layers.reshape(q_t, [q_t.shape[0], 1, q_t.shape[-1]])
         q_t = layers.expand(q_t, [1, 4, 1])  # [env*batch,4,22]
         q_taken = layers.reduce_sum(q_t * actions_one_hot[:, :, t, :], dim=-1)  # [env*batch,4]
         q_t_taken = targets[:, :, t]  # [env*batch,4]
         td_error = q_taken - q_t_taken  # [env*batch,4]
         q_vals_list.append(q_t)  # [env*batch,4,22]

         loss = layers.reduce_sum(td_error ** 2)  # [1]
         optimizer.minimize(loss)
         critic_train_stats["critic_loss"].append(loss)
         critic_train_stats['td_error_abs'].append(td_error)
         critic_train_stats['q_taken_mean'].append(q_taken)
         critic_train_stats['target_mean'].append(q_t_taken)

     q_vals = layers.stack(q_vals_list, axis=2)  # [env*batch,4,time,22]
     for key in critic_train_stats.keys():
         critic_train_stats[key] = layers.reduce_sum(layers.stack(critic_train_stats[key]))
     return q_vals, critic_train_stats

error:

File ,line 150, in learn q_vals, critic_train_stats = self._train_critic(obs, actions, last_actions, rewards, targets, lr_critic) File line 116, in train_critic optimizer.minimize(loss) File "", line 2, in minimize File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/wrapped_decorator.py", line 25, in impl return wrapped_func(*args, **kwargs) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/dygraph/base.py", line 87, in impl return func(*args, **kwargs) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/optimizer.py", line 594, in minimize no_grad_set=no_grad_set) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/optimizer.py", line 493, in backward no_grad_set, callbacks) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/backward.py", line 571, in append_backward input_grad_names_set=input_grad_names_set) File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/paddle/fluid/backward.py", line 310, in append_backward_ops op.desc, cpt.to_text(no_grad_dict[block.idx]), grad_sub_block_list) paddle.fluid.core_avx.EnforceNotMet: grad_op_maker should not be null Operator GradOpMaker has not been registered. at [/home/teamcity/work/ef54dc8a5b211854/paddle/fluid/framework/op_info.h:69]

issue来源： https://github.com/PaddlePaddle/PARL/issues/149