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fix(credential-provider-node): handle passive credential refresh rejection - #8281
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smilkuri merged 1 commit intoAug 31, 2026
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kuhe
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Aug 31, 2026
…ction The passive background refresh in memoizeChain is fire-and-forget: unlike the active and force-refresh locks, it is never awaited, so its rejection cannot reach any caller. It also had no rejection handler, which turned a transient failure of the background chain() call into a process-level unhandledRejection that consumer code cannot catch. The cached credentials returned on the passive path are still valid, and the finally block already releases the lock so the next invocation retries, making the rejection safe to contain. The fire-and-forget passive lock dates to aws#7456. aws#7692 later added the finally lock-release to both the active and passive locks but added no catch to either; the awaited locks surface their rejections to the caller, so only the passive branch needed one. Adds the missing passive-rejection spec case, which fails without this change.
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Issue
Fixes #8280
Description
The passive background refresh in
memoizeChainis the only one of the three locks that is never awaited, and it had no rejection handler, so a transient failure of the backgroundchain(options)call escaped as a process-levelunhandledRejectionthat consumer code cannot catch. Trigger sequence and production details are in the linked issue.The failure is safe to contain: the cached credentials returned on the passive path are still valid, and the
.finally()from #7692 already releases the lock so the next invocation retries the chain. This adds a.catch()between the.thenand the.finally, with a comment explaining why containment is correct there. No change to the success path or to the active and force-refresh locks.Testing
Added "should not surface an unhandled rejection when the passive refresh fails" to
memoize-chain.spec.ts. It listens forunhandledRejection, caches valid credentials, then triggers a passive refresh that rejects. It asserts the listener captures nothing while the caller keeps receiving the cached credentials, and that a later invocation retries the chain and picks up the refreshed set.Checklist
*.integ.spec.ts) or E2E tests.@public,@internaltags and enabled doc generation on the package. Remember that access level annotations go below the description, not above.By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.
Without the fix the new case fails (
AssertionError: expected [ …(1) ] to deeply equal [], the captured entry being theCredentialsProviderError); suite: 1 failed | 22 passed. With the fix: 3 files, 23 tests, all passing.Drafted with AI assistance; reviewed and tested by the author.