Connect unary should return unavailable instead of unimplemented for io.EOF errors from the transport
#776
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…IO errors from transport Signed-off-by: Josh Humphries <[email protected]>
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Signed-off-by: Josh Humphries <[email protected]>
jhump
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Sep 13, 2024
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| - pkg: connectrpc.com/connect | ||
| alias: connect |
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Since v1.11.0 (the move to the connectrpc.com domain), it is no longer necessary/helpful to always have an import alias here. So I've removed this requirement and removed the (superfluous) alias in the file I touched below.
emcfarlane
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Sep 13, 2024
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@emcfarlane, I think you are suggesting a different approach other than replacing the |
emcfarlane
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Sep 16, 2024
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@jhump comments were only nits, i've resolved. |
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This adds a test that can reproduce the issue where unary RPCs would return an
unimplementedcode when anunavailablecode was more appropriate. Basically, it was mistakenly interpreting network EOF errors as "the server did not send us any response messages which is cardinality violation" instead of "the server connection broke so the server response is unavailable".There are still cases where an
io.EOFcould likely be misinterpreted as a cardinality issue: if it the connection is severed after the headers have been received but before the first byte of the first envelope has been received. But the main case where this issue has been reported was for unary RPCs in the Connect protocol, which does not suffer from that issue, since it does not use envelopes.So this isn't 100% perfect, but it gets us closer and likely fixes most of the issues in practice. So while it doesn't fully resolve #774, it should help a lot.