Re: following thunderbird upgrade to 102, it takes over 1h of 100% CPU to start

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On 8/28/22 3:25 AM, Eyal Lebedinsky wrote:
f36, just updated and received thunderbird-librnp-rnp-102.2.0-1.fc36.x86_64
from thunderbird-91.12.0-1.fc36.x86_64

tb brings up the expected display but no input is accepted. The process is shown as running with 100% CPU         PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND       72149 eyal      20   0 4075036 772700 223612 R 100.3   2.4 5:26.57 thunderbird It will not refresh(*) the panel and will start responding after about 1h.
    [later] I see the panel was refreshed after 50m
    but input was still not accepted and the display will not refresh. It resolved after 70m.
After this is seems to be OK, I can read mail etc.

Just now my FC35 system upgraded from thunderbird-91.12.0-1 -> 102.2.0-1. I'm not experiencing a one-hour delay BUT there is a < 1 minute delay. After the delay finishes, a message appears saying that TB couldn't connect to one of my IMAP servers but otherwise TB seems to be functional. During the delay, I'll often (but not always) see a message in the bottom status bar saying "Looking up <DNS for IMAP server>" that continues to display until the failure to connect message pops up. This is odd because my DNS resolution setup is otherwise reliable and fast. Other times, TB's window decorations are painted but the window is empty until the failure to connect message pops up. TB 91 starts up without any delay. I see that TB 102 has a DNS-over-HTTPS option under General / Network Connection / Settings but it's disabled.

The longish delay plus the "looking up" messages seem to point to a DNS resolution issue with the new TB 102.

Dave
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