Add testProxyStreamingNoDeadlock test#181
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Because of there is a maximum number of concurrent connections per host it is possible for the client to deadlock itself when making requests with a streamed body if the body data is itself requested from the same host. If we reach the maximum number of concurrent requests for a certain host, and if all active tasks use a streamed body that obtains its data from requests to the same host, then the bodies will never be obtained as the requests they need to make will be put on a queue whose ability to dequeue them depends on their very result -> deadlock.
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ktoso commented Aug 20, 2020
Just as a heads up, the main development branch has been changed to This PR has been re-targeted to main and should just work. However when performing rebases etc please keep this in mind -- you may want to fetch the main branch and rebase onto the |
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Because there is a maximum number of concurrent connections per host
it is possible for the client to deadlock itself when making requests
with a streamed body if the body data is itself requested from the same
host.
If we reach the maximum number of concurrent requests for a certain
host, and if all active tasks use a streamed body that obtains its data
from requests to the same host, then the bodies will never be obtained as
the requests they need to make will be put on a queue whose ability to
dequeue them depends on their very result -> deadlock.