Plotly：无法与本地 orca 服务器进程通信，即使服务器进程似乎正在运行

Question

当我将绘图渲染到文件时，如下所示：

import plotly.graph_objects as go

def produce_graph(graph, data_dir):
    figure = go.Figure()
    [...]
    figure.write_image("output_file.png")

我收到以下错误：

Traceback (most recent call last):
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/plotly/io/_orca.py", line 1559, in to_image
    figure=fig_dict, format=format, scale=scale, width=width, height=height
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/retrying.py", line 49, in wrapped_f
    return Retrying(*dargs, **dkw).call(f, *args, **kw)
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/retrying.py", line 212, in call
    raise attempt.get()
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/retrying.py", line 247, in get
    six.reraise(self.value[0], self.value[1], self.value[2])
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/six.py", line 696, in reraise
    raise value
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/retrying.py", line 200, in call
    attempt = Attempt(fn(*args, **kwargs), attempt_number, False)
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/plotly/io/_orca.py", line 1474, in request_image_with_retrying
    raise OSError("522: client socket timeout")
OSError: 522: client socket timeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "study/make_graphs.py", line 169, in <module>
    main()
  File "study/make_graphs.py", line 166, in main
    produce_graph(graph, args.data_dir)
  File "study/make_graphs.py", line 70, in produce_graph
    figure.write_image(output_file_name)
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/plotly/basedatatypes.py", line 2824, in write_image
    return pio.write_image(self, *args, **kwargs)
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/plotly/io/_orca.py", line 1767, in write_image
    fig, format=format, scale=scale, width=width, height=height, validate=validate
  File "/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/plotly/io/_orca.py", line 1591, in to_image
    info=status_str
ValueError: 
For some reason plotly.py was unable to communicate with the
local orca server process, even though the server process seems to be running.

Please review the process and connection information below:

orca status
-----------
    state: running
    executable: /usr/local/bin/orca
    version: 1.2.1
    port: 65465
    pid: 90478
    command: ['/usr/local/bin/orca', 'serve', '-p', '65465', '--plotly', '/Users/brunorijsman/cascade-python/env/lib/python3.7/site-packages/plotly/package_data/plotly.min.js', '--graph-only', '--mathjax', 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js']

我还尝试渲染到 .png 文件和 .jpeg 文件，在这些情况下我也得到了完全相同的错误。

将图形渲染到浏览器效果很好：

figure.show()

我已经尝试添加以下内容，但没有什么区别：

plotly.io.orca.ensure_server()
time.sleep(10)

Answer 1

正如这个问题

你应该设置超时禁用

# Disable the orca response timeout.
import plotly.io._orca
import retrying
unwrapped = plotly.io._orca.request_image_with_retrying.__wrapped__
wrapped = retrying.retry(wait_random_min=1000)(unwrapped)
plotly.io._orca.request_image_with_retrying = wrapped