Issue 331746 in chromium: Chrome attempts multiple connections to [2001:4860:4860::8888]:53 per second

[c***@googlecode.com]

Status: Untriaged
Owner: ----
Labels: Type-Bug Pri-2 Cr-Internals-Network-DNS OS-Mac

New issue 331746 by ***@chromium.org: Chrome attempts multiple
connections to [2001:4860:4860::8888]:53 per second
http://code.google.com/p/chromium/issues/detail?id=331746

Chrome Version 34.0.1769.2 (Official Build 243010) on MacOS canary attempts
multiple connections to [2001:4860:4860::8888]:53 per second and does not
stop even if they fail each time.

From chrome://net-internals:

2949: UDP_SOCKET
[2001:4860:4860::8888]:53
Start Time: 2014-01-06 09:30:30.507

t=15457 [st=0] +SOCKET_ALIVE [dt=0]
--> source_dependency = 2948 (HOST_RESOLVER_IMPL_REQUEST)
t=15457 [st=0] +UDP_CONNECT [dt=0]
--> address = "[2001:4860:4860::8888]:53"
t=15457 [st=0] -UDP_CONNECT
--> net_error = -109 (ERR_ADDRESS_UNREACHABLE)
t=15457 [st=0] -SOCKET_ALIVE

I have recorded net events for some time and 327 of 1836 events are
connection attempts to [2001:4860:4860::8888]:53.

Is this WAI?
--
You received this message because this project is configured to send all
issue notifications to this address.
You may adjust your notification preferences at:
https://code.google.com/hosting/settings

[c***@googlecode.com]

Updates:
Status: Assigned
Owner: ***@chromium.org

Comment #1 on issue 331746 by ***@chromium.org: Chrome attempts multiple
connections to [2001:4860:4860::8888]:53 per second
http://code.google.com/p/chromium/issues/detail?id=331746

This is WAI. This UDP connect is used to determine current global IPv6
reachability. See Issue 223876.

There's a proposal Issue 260348 which would drastically reduce the rate of
probes.
Alternatively, https://codereview.chromium.org/25058003/ caches the result
for 20s, but we should consider clarifying in the NetLog that this is an
IPv6 check.
--
You received this message because this project is configured to send all
issue notifications to this address.
You may adjust your notification preferences at:
https://code.google.com/hosting/settings

[c***@googlecode.com]

Comment #2 on issue 331746 by ***@chromium.org: Chrome attempts multiple
connections to [2001:4860:4860::8888]:53 per second
http://code.google.com/p/chromium/issues/detail?id=331746

Note, UDP connect is locally terminated -- no packet is sent on the network.
--
You received this message because this project is configured to send all
issue notifications to this address.
You may adjust your notification preferences at:
https://code.google.com/hosting/settings

[c***@googlecode.com]

Comment #7 on issue 331746 by ***@chromium.org: Chrome attempts multiple
connections to [2001:4860:4860::8888]:53 per second
https://code.google.com/p/chromium/issues/detail?id=331746

Because it's working as intended, and these aren't real connection attempts.
--
You received this message because this project is configured to send all
issue notifications to this address.
You may adjust your notification preferences at:
https://code.google.com/hosting/settings