asjadsyed opened a new pull request, #3117:
URL: https://github.com/apache/thrift/pull/3117
<!-- Explain the changes in the pull request below: -->
As I mentioned in
[THRIFT-5024](https://issues.apache.org/jira/browse/THRIFT-5024), there's still
another issue that's preventing Thrift from working with newer versions of
Tornado. We get this stack trace once the client is started:
```
~/thrift$ cd tutorial/py.tornado/
~/thrift/tutorial/py.tornado$ python3 ./PythonServer.py
Starting the server...
Exception in callback functools.partial(<function
TCPServer._handle_connection.<locals>.<lambda> at 0x7fb547e99360>, <Future
finished exception=AttributeError("'TTornadoServer' object has no attribute
'io_loop'")>)
Traceback (most recent call last):
File "/home/asjad/.local/lib/python3.10/site-packages/tornado/ioloop.py",
line 750, in _run_callback
ret = callback()
File
"/home/asjad/.local/lib/python3.10/site-packages/tornado/tcpserver.py", line
387, in <lambda>
gen.convert_yielded(future), lambda f: f.result()
File "/home/asjad/.local/lib/python3.10/site-packages/tornado/gen.py",
line 233, in wrapper
yielded = ctx_run(next, result)
File
"/home/asjad/thrift/tutorial/py.tornado/../../lib/py/build/lib.linux-x86_64-3.10/thrift/TTornado.py",
line 168, in handle_stream
io_loop=self.io_loop)
AttributeError: 'TTornadoServer' object has no attribute 'io_loop'
```
```
~/thrift$ cd tutorial/py.tornado/
~/thrift/tutorial/py.tornado$ python3 ./PythonClient.py
```
This bug appeared because `TTornadoServer` inherits from Tornado's
`tcpserver.TCPServer` and is using its `self.io_loop` attribute, which [Tornado
removed in
v5.0](https://github.com/tornadoweb/tornado/blob/ad9652512ff6a7486ca5290b060e7272d1696a37/tornado/tcpserver.py#L120-L122),
[as passing around `io_loop`s is deprecated in favor of using
`IOLoop.current()` to retrieve
it](https://github.com/tornadoweb/tornado/commit/547e0f98d56bb8f22a89c009b6d2b3cf6b802284).
I also touched the `gen.with_timeout` call as that signature also changed to
remove `io_loop`:
([v4.5](https://www.tornadoweb.org/en/branch4.5/gen.html#tornado.gen.with_timeout)
vs
[v5.1](https://www.tornadoweb.org/en/branch5.1/gen.html#tornado.gen.with_timeout)).
This was mentioned in the [Tornado 5.0 Release
Notes](https://www.tornadoweb.org/en/stable/releases/v5.0.0.html).
<!-- We recommend you review the checklist/tips before submitting a pull
request. -->
- [x] Did you create an [Apache
Jira](https://issues.apache.org/jira/projects/THRIFT/issues/) ticket?
([Request account here](https://selfserve.apache.org/jira-account.html), not
required for trivial changes)
- [THRIFT-5857](https://issues.apache.org/jira/browse/THRIFT-5857)
- [x] If a ticket exists: Does your pull request title follow the pattern
"THRIFT-NNNN: describe my issue"?
- Yes
- [x] Did you squash your changes to a single commit? (not required, but
preferred)
- Yes
- [x] Did you do your best to avoid breaking changes? If one was needed,
did you label the Jira ticket with "Breaking-Change"?
- Yes. Originally I wanted to remove `TTornadoStreamTransport`'s `io_loop`
parameter, but to avoid making a breaking change, I left a deprecation warning.
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in the commit message to free up build resources.
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