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fix(xfr): honour context cancellation during an in-flight transfer (F53) - #84
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transfer() only used ctx for the dial; a primary that stalled after the query held AXFR/IXFR (and secondary shutdown / catalog withdrawal) for the per-message timeout. Close the connection when ctx is cancelled.
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After connecting, AXFR/IXFR ignored
ctxcancellation. A stalled primary held the caller for the per-message timeout, delaying shutdown and catalog member removal.Fix:
context.AfterFunc(ctx, conn.Close)and return a wrappedctx.Err()when cancelled.Regression test:
TestTransfer_ContextCancelUnblocksStalledPrimary(AXFR, IXFR, already-cancelled ctx). Verified 3x with-race.