Created by: QinZiwen

我模仿demo写了这样一个测试例子：

import random
from visualdl import LogWriter

logdir = "./random_log"

logw = LogWriter(logdir, sync_cycle=10)

with logw.mode('train') as logger:
    train_loss_log = logger.scalar("train/loss")
    train_correct_acc_log = logger.scalar("CorrectAccuracy")
    train_mistake_acc_log = logger.scalar("MistakeAccuracy")

with logw.mode('valid') as logger:
    valid_correct_acc_log = logger.scalar("CorrectAccuracy")
    valid_mistake_acc_log = logger.scalar("MistakeAccuracy")

for step in range(200):
    train_loss_log.add_record(step, 200./(step + 1))
    train_correct_acc_log.add_record(step, step * 2.0)
    train_mistake_acc_log.add_record(step, step * 3.0)
    valid_correct_acc_log.add_record(step, step * 4.0)
    valid_mistake_acc_log.add_record(step, step * 1.0)

当用浏览其可视化的时候，终端报错：

 -
[WARNING 2018-01-19 13:13:25,795 lib.py:218] update cache /data/plugin/scalars/scalars/train/MistakeAccuracy
[INFO 2018-01-19 13:13:25,798 _internal.py:88] 127.0.0.1 - - [19/Jan/2018 13:13:25] "GET /data/plugin/scalars/scalars?run=train&tag=MistakeAccuracy HTTP/1.1" 200 -
[WARNING 2018-01-19 13:13:25,798 lib.py:218] update cache /data/plugin/scalars/scalars/valid/MistakeAccuracy
[libprotobuf FATAL /build/VisualDL/build/third_party/install/protobuf/include/google/protobuf/repeated_field.h:1431] CHECK failed: (index) < (current_size_): 
[ERROR 2018-01-19 13:13:25,800 lib.py:211] Unexpected error: <type 'exceptions.RuntimeError'>
CHECK failed: (index) < (current_size_): 
<traceback object at 0x7fb04e2b95f0>
[libprotobuf FATAL /build/VisualDL/build/third_party/install/protobuf/include/google/protobuf/repeated_field.h:1431] CHECK failed: (index) < (current_size_): 
[ERROR 2018-01-19 13:13:27,803 lib.py:211] Unexpected error: <type 'exceptions.RuntimeError'>
CHECK failed: (index) < (current_size_): 
<traceback object at 0x7fb04e2b9488>
[libprotobuf FATAL /build/VisualDL/build/third_party/install/protobuf/include/google/protobuf/repeated_field.h:1431] CHECK failed: (index) < (current_size_): 
[ERROR 2018-01-19 13:13:29,810 lib.py:211] Unexpected error: <type 'exceptions.RuntimeError'>
CHECK failed: (index) < (current_size_): 
<traceback object at 0x7fb04e2b94d0>

但是，只要我把‘CorrectAccuracy’ 或者 ‘MistakeAccuracy’ ，任意一个删除掉，就不报错，一起正常。难道是visualdl只支持两个scalar？