由于 Apache Superset 中的 JSON 解码错误，无法加载仪表板列表答案

【问题标题】：Unable to load dashboards list due to JSON decode error in Apache Superset由于 Apache Superset 中的 JSON 解码错误，无法加载仪表板列表
【发布时间】：2021-01-15 09:26:00
【问题描述】：

我正在尝试在我的 Superset 中获取仪表板，但遇到以下错误：

ERROR:root:Expecting ',' delimiter: line 1 column 106 (char 105)

上述错误是在我尾随 pod 时发生的。

在前端，我只看到：An error occurred while fetching dashboards.

完整的堆栈跟踪是：

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/flask_appbuilder/api/__init__.py", line 84, in wraps
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/flask_appbuilder/api/__init__.py", line 154, in wraps
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/flask_appbuilder/api/__init__.py", line 1567, in get_list
    return self.get_list_headless(**kwargs)
  File "/usr/local/lib/python3.6/site-packages/superset/views/base_api.py", line 232, in get_list_headless
    duration, response = time_function(super().get_list_headless, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/superset/utils/core.py", line 1296, in time_function
    response = func(*args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/flask_appbuilder/api/__init__.py", line 1469, in get_list_headless
    _response[API_RESULT_RES_KEY] = _list_model_schema.dump(lst, many=True)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/schema.py", line 557, in dump
    result = self._serialize(processed_obj, many=many)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/schema.py", line 517, in _serialize
    for d in typing.cast(typing.Iterable[_T], obj)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/schema.py", line 517, in <listcomp>
    for d in typing.cast(typing.Iterable[_T], obj)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/schema.py", line 521, in _serialize
    value = field_obj.serialize(attr_name, obj, accessor=self.get_attribute)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/fields.py", line 308, in serialize
    value = self.get_value(obj, attr, accessor=accessor)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/fields.py", line 227, in get_value
    return accessor_func(obj, check_key, default)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/schema.py", line 478, in get_attribute
    return get_value(obj, attr, default)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/utils.py", line 232, in get_value
    return _get_value_for_key(obj, key, default)
  File "/usr/local/lib/python3.6/site-packages/marshmallow/utils.py", line 246, in _get_value_for_key
    return getattr(obj, key, default)
  File "/usr/local/lib/python3.6/site-packages/superset/models/dashboard.py", line 158, in url
    json_metadata = json.loads(self.json_metadata)
  File "/usr/local/lib/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/usr/local/lib/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/local/lib/python3.6/json/decoder.py", line 355, in raw_decode
    obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Expecting ',' delimiter: line 1 column 106 (char 105)

我试图查看数据库中的dashboards 表，但找不到任何异常。我尝试加载仪表板页面（/dashboard/list/）并得到与上面相同的 JSON 错误。

在我的数据库中，我尝试在published 列下将所有仪表板标记为false，即使错误没有消失。

【问题讨论】：

标签： python json python-3.x apache-superset superset

【解决方案1】：

似乎 json_metadata 列在仪表板表中的 1 行或所有行中都损坏了。我会尝试找出它失败的原因（看起来像是this line）。您可以尝试针对数据库运行超集的开发版本，并在失败的地方添加一些日志记录。您还可以尝试检查该表中的 json_metadata 列（尝试将其提供给 python json 解析器），看看您是否可以识别导致 json.loads 函数失败的问题。

【讨论】：