sentryyoutrack插件：PicklingError:无法pickle<type'generator'>：属性查找\uUuBuiltin\uUuGenerator失败

Question

• 哨兵：8.4.0
• sentry youtrack插件：0.3.1
• youtrack-6.5.17105
• python memcached:1.53

我试图使用this插件将youtrack集成到sentry中。在

问题是，当我们单击“更多-->创建您的跟踪问题”时，页面似乎挂起。查看系统日志，我看到了：

Traceback (most recent call last):
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../django/core/handlers/base.py", line 112, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../django/utils/decorators.py", line 29, in _wrapper
    return bound_func(*args, **kwargs)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../django/utils/decorators.py", line 99, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../django/utils/decorators.py", line 25, in bound_func
    return func(self, *args2, **kwargs2)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/web/frontend/base.py", line 172, in dispatch
    return self.handle(request, *args, **kwargs)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/web/frontend/group_plugin_action.py", line 25, in handle
    response = plugin.get_view_response(request, group)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../sentry_youtrack/plugin.py", line 113, in get_view_response
    return super(YouTrackPlugin, self).get_view_response(request, group)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/plugins/base/v1.py", line 296, in get_view_response
    response = self.view(request, group)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../sentry_youtrack/plugin.py", line 131, in view
    return view(request, group, **kwargs)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/plugins/bases/issue.py", line 169, in view
    form = self.get_new_issue_form(request, group, event)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../sentry_youtrack/plugin.py", line 77, in get_new_issue_form
    project_fields=self.get_project_fields(group.project),
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../sentry_youtrack/plugin.py", line 57, in get_project_fields
    return cached_fields(self.get_option('ignore_fields', project))
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../sentry_youtrack/utils.py", line 16, in wrapper
    cache.set(key, result, timeout)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../django/core/cache/backends/memcached.py", line 82, in set
    self._cache.set(key, value, self._get_memcache_timeout(timeout))
  File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 740, in set
    return self._set("set", key, val, time, min_compress_len, noreply)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 1060, in _set
    return _unsafe_set()
  File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 1034, in _unsafe_set
    store_info = self._val_to_store_info(val, min_compress_len)
  File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 998, in _val_to_store_info
    pickler.dump(val)
PicklingError: Can't pickle <type 'generator'>: attribute lookup __builtin__.generator failed

跟踪回溯（https://github.com/bogdal/sentry-youtrack/blob/master/sentry_youtrack/utils.py#L6）：

^{pr2}$

我知道我们得到这个错误是因为result是一个生成器。在

https://github.com/bogdal/sentry-youtrack/blob/master/sentry_youtrack/plugin.py#L51：

def get_project_fields(self, project):
    @cache_this(600)
    def cached_fields(ignore_fields):
        yt_client = self.get_youtrack_client(project)
        return yt_client.get_project_fields(
            self.get_option('project', project), ignore_fields)
    return cached_fields(self.get_option('ignore_fields', project))

https://github.com/bogdal/sentry-youtrack/blob/master/sentry_youtrack/youtrack.py#L198：

def get_project_fields(self, project_id, ignore_fields=None):
    ignore_fields = ignore_fields or []
    for field in self.get_project_fields_list(project_id):
        if not field['name'] in ignore_fields:
            yield self._get_custom_project_field_details(field)

所以，我想把它转换成一个列表：

        if not result:
            result = func(*args, **kwargs)
            cache.set(key, [f for f in result], timeout)
        return result

但还是有同样的错误：

      File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../sentry_youtrack/utils.py", line 16, in wrapper
        cache.set(key, [f for f in result], timeout)
      File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../django/core/cache/backends/memcached.py", line 82, in set
        self._cache.set(key, value, self._get_memcache_timeout(timeout))
      File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 740, in set
        return self._set("set", key, val, time, min_compress_len, noreply)
      File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 1060, in _set
        return _unsafe_set()
      File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 1034, in _unsafe_set
        store_info = self._val_to_store_info(val, min_compress_len)
      File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 998, in _val_to_store_info
        pickler.dump(val)
    PicklingError: Can't pickle <type 'generator'>: attribute lookup __builtin__.generator failed

然后我试图将val的值记录到一个文件中：

        try:
            pickler.dump(val)
        except Exception:
            with open('/tmp/quanta.log', 'a+') as f:
                f.write(str(val))

但是这个文件没有被创建。奇怪的是，回溯显示错误发生在与之前相同的线路上：

      File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../sentry_youtrack/utils.py", line 16, in wrapper
        cache.set(key, [f for f in result], timeout)
      File "/usr/local/sentry/local/lib/python2.7/site-packages/sentry/../django/core/cache/backends/memcached.py", line 82, in set
        self._cache.set(key, value, self._get_memcache_timeout(timeout))
      File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 740, in set
        return self._set("set", key, val, time, min_compress_len, noreply)
      File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 1060, in _set
        msg = msg[1]
      File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 1034, in _unsafe_set

      File "/usr/local/sentry/local/lib/python2.7/site-packages/memcache.py", line 998, in _val_to_store_info
        try:
    PicklingError: Can't pickle <type 'generator'>: attribute lookup __builtin__.generator failed

所以，我有两个问题：

1. 为什么错误在转换为列表时仍然显示Can't pickle <type 'generator'>...？在
2. 在调用pickler.dump(val)之前，如何调试这种情况以知道val的值？在

Answer 1

这是sentry youtrack的错误，它不应该缓存生成器对象。python memcached可能有一个pyc文件，这就是为什么它没有像您修改的那样转储值。你添加了（i代表列表中的i），这也是一个生成器。在

您应该使用getsentry/sentry youtrack，因为它有用于缓存生成器的correct fix。在