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test(ecstore): fix rename_all WARN flake from callsite-interest poisoning (#5448)

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rename_all_missing_source_still_warns and rename_all_real_failure_still_warns
assert that `warn_reliable_rename_failure` emitted its WARN, but that is a
single production callsite shared with tests that call rename_all *without*
installing a subscriber — rename_all_missing_source_returns_file_not_found,
two tests above, is one of them.

tracing caches each callsite's Interest process-globally and the first thread
to reach a callsite fixes that value; while at most one dispatcher is
registered, tracing-core derives it from the registering thread's own
subscriber, and registration is once-only. When the subscriber-less sibling
wins, the callsite is cached as Interest::never() and the WARN never fires,
so the assertion sees empty output:

    ordinary missing-source failures must keep the WARN, got:

Reproduced at 3/25 with `disk::os::tests::rename_all_missing_source` (both
tests), against 0/20 for the victim alone. Fixed by pinning callsite interest
inside warn_capture(), so every current and future user of that helper is
covered rather than just the two tests that happen to fail today.

pin_callsite_interest_for_test() moves from cluster::rpc::background_monitor
to a new crate-level test_tracing module: it is domain-neutral and now has
consumers in two unrelated subsystems, and disk::os should not have to reach
into a cluster::rpc test helper.

Verified: repro filter 0/30 (was 3/25); disk::os:: 0/12; cluster::rpc:: 0/12
and its poisoner pair 0/15, confirming the moved helper still holds.

Follow-up to #5438. Closes the last item in #5439.
This commit is contained in:
Zhengchao An
2026-07-30 07:26:12 +08:00
committed by GitHub
parent 3a6212f597
commit 422e0ad768
7 changed files with 71 additions and 45 deletions
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crates/ecstore/src/cluster/rpc/remote_disk.rs
+2 -2
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@@ -5336,7 +5336,7 @@ mod tests {
// production callsites that sibling tests exercise from subscriber-less
// threads; without this they can be cached as `Interest::never()` and go
// silently missing here.
let _callsite_pin = crate::cluster::rpc::pin_callsite_interest_for_test();
let _callsite_pin = crate::test_tracing::pin_callsite_interest_for_test();
let endpoint = Endpoint {
url: url::Url::parse("http://127.0.0.1:59996/data").expect("endpoint URL should parse"),
@@ -5395,7 +5395,7 @@ mod tests {
// production callsites that sibling tests exercise from subscriber-less
// threads; without this they can be cached as `Interest::never()` and go
// silently missing here.
let _callsite_pin = crate::cluster::rpc::pin_callsite_interest_for_test();
let _callsite_pin = crate::test_tracing::pin_callsite_interest_for_test();
let addr = "http://127.0.0.1:59997".to_string();
let endpoint = Endpoint {