relay: wrap consumer in CrossExecFilter inside PublisherCrossExecFilter#352
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subscribe() and fetch() now capture the caller's executor and wrap the consumer before dispatching to targetExec_, so upstream data is delivered back on the caller's executor without call-site boilerplate. On fetch error, inner_ never stored the consumer so no lambdas are in-flight; deactivate() breaks the selfGuard_ cycle to prevent a leak. Test: FetchErrorDoesNotCallEndOfFetch asserts endOfFetch is not called on error; FetchReturnsSuccess is updated to run on an EventBase so the captured callerExec stays alive for the endOfFetch drain.
afrind
requested review from
Oxyd,
TimEvens,
akash-a-n,
gmarzot,
michalhosna,
mondain,
peterchave and
suhasHere
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gmarzot
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May 28, 2026
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@gmarzot reviewed 2 files and all commit messages.
Reviewable status:complete! all files reviewed, all discussions resolved (waiting on akash-a-n, michalhosna, mondain, Oxyd, peterchave, suhasHere, and TimEvens).
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subscribe() and fetch() now capture the caller's executor and wrap the consumer before dispatching to targetExec_, so upstream data is delivered back on the caller's executor without call-site boilerplate. On fetch error, inner_ never stored the consumer so no lambdas are in-flight; deactivate() breaks the selfGuard_ cycle to prevent a leak.
Test: FetchErrorDoesNotCallEndOfFetch asserts endOfFetch is not called on error; FetchReturnsSuccess is updated to run on an EventBase so the captured callerExec stays alive for the endOfFetch drain.
This change is