[Bug 2039374] Re: xbrlapi causes long delay in GUI login

[Scoot Lee]

Yes you're right it is abnormal.
What's going on is that I had set the sysctl parameter net.ipv6.conf.lo.disable_ipv6=1, which of course disables the IPv6 loopback.  

But it exhibits a curious behavior where if there is an active IPv6
regular (non-loopback) interface with an IPv6 address and network
connection, then connection attempts to ::1 seem to hang and timeout,
but if there is no active IPv6 at all, then connections to ::1 will
instantly fail with a "cannot assign requested address".

I guess this didn't work this way before 22.04.
There are no IPv6 firewall rules for the loopback.
I haven't seen any other daemons with issues from this. Maybe they are using IPv4 for loopback?

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Title:
  xbrlapi causes long delay in GUI login

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