GraalVM and Amazon API Gateway fail with 1.9 version of aws-serverless-java-container

[sdelamo]

Expected Behavior

Since version 1.9 aws-serverless-java-container introduced SingleValueHeaders.java.

It should work fine with a FAT JAR or native executable.

Actual Behaviour

With Java it works fine. but with native execuiable it fails:

Fails with:

Caused by: io.micronaut.http.codec.CodecException: Error decoding stream for type [class com.amazonaws.serverless.proxy.model.AwsProxyRequest]: Cannot construct instance of `com.amazonaws.serverless.proxy.model.SingleValueHeaders` (no Creators, like default constructor, exist): no default constructor found
at [Source: (byte[])"{"resource":"/","path":"/","httpMethod":"GET","headers":{"Accept":"*/*","CloudFront-Forwarded-Proto":"https","CloudFront-Is-Desktop-Viewer":"true","CloudFront-Is-Mobile-Viewer":"false","CloudFront-Is-SmartTV-Viewer":"false","CloudFront-Is-Tablet-Viewer":"false","CloudFront-Viewer-ASN":"3352","CloudFront-Viewer-Country":"ES","Host":"644w7xh6r1.execute-api.us-east-1.amazonaws.com","User-Agent":"curl/7.84.0","Via":"2.0 d965728bf3120b9df2983219ebe95680.cloudfront.net (CloudFront)","X-Amz-Cf-Id":"Enl"[truncated 1804 bytes]; line: 1, column: 57] (through reference chain: com.amazonaws.serverless.proxy.model.AwsProxyRequest["headers"])

SingleValueHeader looks like:

package com.amazonaws.serverless.proxy.model;

import java.util.TreeMap;

public class SingleValueHeaders extends TreeMap<String, String> {

    private static final long serialVersionUID = 42L;

    public SingleValueHeaders() {
        super(String.CASE_INSENSITIVE_ORDER);
    }
}

Steps To Reproduce

• Use Java 11
• Install AWS CLI
• Install AWS CDK
• run ./test-lambda.sh You will see internal server error in the output instead of success. If you go to your AWS Console and check the cloud watch logs for the Lambda you will see the previous error.

Environment Information

x86 architecture

Example Application

Sample App

Version

3.8.0-SNAPSHOT

[sdelamo]

Adding @TypeHint for SingleValueHeaders did not work.

however, adding both @TypeHint for SingleValueHeaders and @TreeMap did work. Thanks @n0tl3ss !