Skip ClassCastException on every DynamoDB request in AWS SDK v2 instrumentation#11285
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Skip ClassCastException on every DynamoDB request in AWS SDK v2 instrumentation#11285
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`getValueForField("Key", String.class)` was called on every AWS SDK v2
request and a `ClassCastException` was caught on every DynamoDB
Get/Put/Update/Delete item call (Key is `Map<String, AttributeValue>`).
This forced the JVM to fill in a stack trace per request on a hot path.
Gate the `Key` extraction to S3 (the only service whose top-level `Key`
is a `String`), inline the helper, and drop the dead try/catch. Behavior
for S3 is unchanged — `setObjectKey` already wrote the same tag the
DSM-only branch was writing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
dougqh
added
inst: aws sdk
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Summary
AwsSdkClientDecorator.onSdkRequestcalledgetValueForField("Key", String.class)for every AWS SDK v2 request and silently caught aClassCastExceptionon every DynamoDB Get/Put/Update/Delete item call (DynamoDB modelsKeyasMap<String, AttributeValue>).// Key is not always a string, like for dynamodb GetItemRequest), but the JVM still filled in a stack trace per request on a hot path.Keyextraction to S3 — the only AWS service whose top-levelKeyfield is aString— and inline the helper so the deadtry/catchgoes away.setObjectKeywrites the sameaws.object.keytag the DSM-only branch was writing; the DSM branch is preserved forhttp.request.content_lengthonly.Test plan
:dd-java-agent:instrumentation:aws-java:aws-java-sdk-2.2:test(existing S3 GetObject/PutObject cases assertaws.object.keyis set).:dd-java-agent:instrumentation:aws-java:aws-java-dynamodb-2.0:test(verifies no regression on DynamoDB span tagging).🤖 Generated with Claude Code