Request method "dumpWindowHierarchy" may cause exception "http.client.RemoteDisconnected: Remote end closed connection without response"

[vskarinov]

• Python 3.10
• uiautomator2 == 3.3.3

When I call method get from uiautomator2.xpath.XPathSelector with args 'timeout' not None, i may get exception "http.client.RemoteDisconnected: Remote end closed connection without response"

According to trace, eventually we call method get_page_source from uiautomator2.xpath.XPathEntry that sends rpc request:

method: POST
path: /jsonrpc/0
body: {"jsonrpc": "2.0", "id": 1, "method": "dumpWindowHierarchy", "params": [false, 50]} | {'User-Agent': 'uiautomator2', 'Accept-Encoding': '', 'Content-Type': 'application/json'}

we fail to get response with _response = conn.getresponse() from core.py

Here is a piece of my trace:

File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/xpath.py", line 427, in get
if not self.wait(timeout or self._global_timeout):
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/xpath.py", line 456, in wait
if self.exists:
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/xpath.py", line 412, in exists
return len(self.all()) > 0
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/xpath.py", line 388, in all
source = self._get_page_source()
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/xpath.py", line 383, in _get_page_source
return self._parent.get_page_source()
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/xpath.py", line 197, in get_page_source
return PageSource.parse(self._d.dump_hierarchy())
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/init.py", line 107, in dump_hierarchy
content = self._do_dump_hierarchy(compressed, max_depth)
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/decorator.py", line 235, in fun
return caller(func, *(extras + args), **kw)
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/retry/api.py", line 90, in retry_decorator
return __retry_internal(partial(f, *args, **kwargs), exceptions, tries, delay, max_delay, backoff, jitter,
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/retry/api.py", line 35, in __retry_internal
return f()
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/init.py", line 122, in _do_dump_hierarchy
content = self.jsonrpc.dumpWindowHierarchy(compressed, max_depth)
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/base.py", line 158, in call
return self.server.jsonrpc_call(self.method, params, http_timeout)
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/core.py", line 311, in jsonrpc_call
return _jsonrpc_call(self._dev, self._device_server_port, method, params, timeout, self._debug)
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/core.py", line 173, in _jsonrpc_call
r = _http_request(dev, device_port, "POST", "/jsonrpc/0", payload, timeout=timeout, print_request=print_request)
File "/Users/v.skarinov/.pyenv/versions/auto_tools/lib/python3.10/site-packages/uiautomator2/core.py", line 140, in _http_request
_response = conn.getresponse()
File "/Users/v.skarinov/.pyenv/versions/3.10.15/lib/python3.10/http/client.py", line 1375, in getresponse
response.begin()
File "/Users/v.skarinov/.pyenv/versions/3.10.15/lib/python3.10/http/client.py", line 318, in begin
version, status, reason = self._read_status()
File "/Users/v.skarinov/.pyenv/versions/3.10.15/lib/python3.10/http/client.py", line 287, in _read_status
raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response