[8.11] Set region for the STS client via privileged calls in AWS SDK (#102230) #102285
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…c#102230) Unfortunately, `AWSSecurityTokenServiceClientBuilder#setRegion` is not just a setter on the builder. It looks up the region by its name which lazily initializes some regional configuration. As a result, the call with an access denied error, because the caller doesn't have permission to call `accessDeclaredMembers` in some Jackson internals. This bug wasn't caught by the `CustomWebIdentityTokenCredentialsProviderTests#testSupportRegionalizedEndpoints` test because it's under with the test framework that does allow naked reflection calls. We fix that in two ways: * Make sure withRegion call is privileged * Eagerly lookup region metadata in `S3Repository` Fixes elastic#102173
arteam
added
backport
v8.11.2
>bug
:Distributed/Snapshot/Restore
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Backports #102230 to 8.11