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| author | Lennart Poettering <lennart@poettering.net> | 2017-02-15 19:56:59 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2017-02-17 10:25:16 +0100 |
| commit | 74a3ed740824a4ead40a733ee27f3ac236aa9f8e (patch) | |
| tree | ef8d189521e224d8764da6a68b933699a83b8a6a /src/resolve/resolved-dns-server.c | |
| parent | 2d4a4e141928f20035e83b59c44f465dbcc893df (diff) | |
| download | systemd-74a3ed740824a4ead40a733ee27f3ac236aa9f8e.tar.gz | |
resolved: extend various timeouts
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
Diffstat (limited to 'src/resolve/resolved-dns-server.c')
| -rw-r--r-- | src/resolve/resolved-dns-server.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/resolve/resolved-dns-server.c b/src/resolve/resolved-dns-server.c index 2df917e61e..5498f7b9cb 100644 --- a/src/resolve/resolved-dns-server.c +++ b/src/resolve/resolved-dns-server.c @@ -28,7 +28,7 @@ #include "string-util.h" /* After how much time to repeat classic DNS requests */ -#define DNS_TIMEOUT_MIN_USEC (500 * USEC_PER_MSEC) +#define DNS_TIMEOUT_MIN_USEC (750 * USEC_PER_MSEC) #define DNS_TIMEOUT_MAX_USEC (5 * USEC_PER_SEC) /* The amount of time to wait before retrying with a full feature set */ |