Author vstinner
Recipients asvetlov, pablogsal, vstinner, yselivanov
Date 2018-06-07.02:52:02
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Message-id <1528339922.49.0.592728768989.issue33694@psf.upfronthosting.co.za>
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Something else. The bug occurs when CancelIoEx() (on the current overlapped WSARecv()) fails internally with ERROR_NOT_FOUND. According to overlapped.c, it means:

/* CancelIoEx returns ERROR_NOT_FOUND if the I/O completed in-between */

HasOverlappedIoCompleted() returns 0 in that case.

The problem is that currently, Overlapped.cancel() also returns None in that case, and later the asyncio IOCP loop ignores the completion event and so drops incoming received data.
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Date User Action Args
2018-06-07 02:52:02vstinnersetrecipients: + vstinner, asvetlov, yselivanov, pablogsal
2018-06-07 02:52:02vstinnersetmessageid: <1528339922.49.0.592728768989.issue33694@psf.upfronthosting.co.za>
2018-06-07 02:52:02vstinnerlinkissue33694 messages
2018-06-07 02:52:02vstinnercreate