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[v23.2.x] [CORE-96]: admin/server fix set_log_level handling of overlapping expirations #18445

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andijcr
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@andijcr andijcr commented May 13, 2024

Backport of PR #18397

first commit adapted for v23.2

Fixes #18436

@andijcr andijcr added the kind/backport PRs targeting a stable branch label May 13, 2024
@andijcr andijcr added this to the v23.2.x-next milestone May 13, 2024
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andijcr commented May 13, 2024

/ci-repeat

_log_level_resets is a map<str, level_reset>, we want to extract the
next expiring level_reset to rearm the _log_level_timer.

previously we would extract the min_element based on the key (the logger
name)

so this sequence of actions
set log-level kafka trace 10
set log-level raft trace 10

only kafka would be expired, because once expired the next run would
pick again kafka, see that there is no expiration, and not rearm the
timer.
@andijcr andijcr force-pushed the vbotbuildovich/backport-18397-v23.2.x-221 branch from 84b87b5 to 6444718 Compare May 13, 2024 20:30
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andijcr commented May 13, 2024

/ci-repeat

@andijcr andijcr force-pushed the vbotbuildovich/backport-18397-v23.2.x-221 branch from 6444718 to 8835ecd Compare May 14, 2024 08:56
@andijcr andijcr marked this pull request as ready for review May 14, 2024 08:56
@andijcr andijcr requested review from a team, aanthony-rp and oleiman and removed request for a team May 14, 2024 08:56
the test shows that this sequence of actions

set log-level admin-api-server trace 10
set log-level raft trace 10

works and both logger are reset after the expiry period
@andijcr andijcr force-pushed the vbotbuildovich/backport-18397-v23.2.x-221 branch from 8835ecd to e7c299a Compare May 14, 2024 08:59
Comment on lines -625 to +633
auto next = std::min_element(
_log_level_resets.begin(),
_log_level_resets.end(),
[](const auto& a, const auto& b) {
return a.second.expires < b.second.expires;
});

if (next != _log_level_resets.end()) {
_log_level_timer.arm(next->second.expires);
if (_log_level_resets.empty()) {
return;
}

auto reset_values = _log_level_resets | std::views::values;
auto& lvl_rst = *std::ranges::min_element(
reset_values, std::less<>{}, &level_reset::expires);
_log_level_timer.arm(lvl_rst.expires);
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Is the original actually bugged? Seems like the motivating issue would have been isolated to v23.3+

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ah you are right, i didn't notice that v23.2 has the correct comparator

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andijcr commented May 14, 2024

closing this as the bug is not in v23.2

@andijcr andijcr closed this May 14, 2024
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2 participants