Motivation and Context

AsyncRequestBody.fromInputStream currently requires customers to provide their own ExecutorService. This is a common source of misconfiguration — undersized or shared executors lead to degraded performance or request timeouts. This change adds a simpler overload that lets the SDK manage threading internally.

Modifications

• Added AsyncRequestBody.fromInputStream(InputStream, Long) overload that uses an SDK-managed shared cached thread pool
• Made executor optional in AsyncRequestBodyFromInputStreamConfiguration (previously required via Validate.paramNotNull)
• InputStreamWithExecutorAsyncRequestBody falls back to a lazily-initialized shared executor when none is provided
• Updated javadoc on the existing 3-arg overload to reference the new simpler API
• Parameterized existing unit tests to cover all three creation paths
• Added S3 integration test for the SDK-managed executor path

Testing

• Parameterized InputStreamWithExecutorAsyncRequestBodyTest covers customer-provided executor, 2-arg overload, and builder-without-executor paths (data copy + error
  forwarding)
• PutObjectIntegrationTest.putObject_fromInputStreamWithSdkManagedExecutor_shouldSucceed validates round-trip upload/download with content verification
• One-off tests verifying threads are being terminated after idle timeout.
• Added unit tests
• Ran existing tests
• Manual testing performed

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING document
• Local run of mvn clean install -pl :sdk-core succeeds for affected modules
• My code follows the code style of this project
• My change requires a change to the Javadoc documentation
• I have updated the Javadoc documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed
• I have added a changelog entry
• My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• I confirm that this pull request can be released under the Apache 2 license