Lennart Poettering
74a3ed7408
Let's increase a number of timeouts as they apparently are too short for some real-world lookups. See: https://github.com/systemd/systemd/issues/4003#issuecomment-279842616 In particular we change the following timeouts: 1) The first UDP retry we increase 500ms → 750ms. This is a good idea, since some servers need relatively long responses for trivial lookups, and giving up our first attempt also has the effect of trying a different server for the next attempt which has the side effect that we'll run two down-grade iterations in parallel, on both servers. Hence, let's give servers a bit more time in the first iteration. 2) Permit 24 retries instead of just 16 per transactions. If we end up downgrading all the way down to UDP for a lookup we already need 5 iterations for that. If we want permit a couple of lost packages for each (let's say 4), then we already need 20 iterations. 3) Increase the overall query timeout on the service side to 60s (from 45s), simply because very long and slow DNSSEC + CNAME chains (such as us.ynuf.alipay.com) hit this boundary too easily. The client side timeout for the bus method call is increased to 90s, in order to have room for the dbus reply to go through
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