S3AsyncClient- SdkClientException: Unable to instantiate executor interceptor for client

Expected Behavior

When running S3AsyncClient s3AsyncClient = S3AsyncClient.create(); In AWS lambda function, got following exception:

Current Behavior

software.amazon.awssdk.core.exception.SdkClientException: Unable to instantiate executor interceptor for client. at software.amazon.awssdk.core.exception.SdkClientException$BuilderImpl.build(SdkClientException.java:97) at software.amazon.awssdk.core.interceptor.ClasspathInterceptorChainFactory.createExecutionInterceptor(ClasspathInterceptorChainFactory.java:140) at software.amazon.awssdk.core.interceptor.ClasspathInterceptorChainFactory.createExecutionInterceptorFromResource(ClasspathInterceptorChainFactory.java:95) at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:267) at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) at software.amazon.awssdk.core.interceptor.ClasspathInterceptorChainFactory.createExecutionInterceptorsFromClasspath(ClasspathInterceptorChainFactory.java:64) at software.amazon.awssdk.core.interceptor.ClasspathInterceptorChainFactory.getInterceptors(ClasspathInterceptorChainFactory.java:51) at software.amazon.awssdk.services.s3.DefaultS3BaseClientBuilder.finalizeServiceConfiguration(DefaultS3BaseClientBuilder.java:57) at software.amazon.awssdk.awscore.client.builder.AwsDefaultClientBuilder.finalizeChildConfiguration(AwsDefaultClientBuilder.java:133) at software.amazon.awssdk.core.client.builder.SdkDefaultClientBuilder.asyncClientConfiguration(SdkDefaultClientBuilder.java:170) at software.amazon.awssdk.services.s3.DefaultS3AsyncClientBuilder.buildClient(DefaultS3AsyncClientBuilder.java:28) at software.amazon.awssdk.services.s3.DefaultS3AsyncClientBuilder.buildClient(DefaultS3AsyncClientBuilder.java:22) at software.amazon.awssdk.core.client.builder.SdkDefaultClientBuilder.build(SdkDefaultClientBuilder.java:119) Caused by: java.lang.ClassNotFoundException: software.amazon.awssdk.services.s3.internal.handlers.EndpointAddressInterceptor at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at software.amazon.awssdk.core.internal.util.ClassLoaderHelper.loadClass(ClassLoaderHelper.java:112) at software.amazon.awssdk.core.internal.util.ClassLoaderHelper.loadClass(ClassLoaderHelper.java:71) at software.amazon.awssdk.core.interceptor.ClasspathInterceptorChainFactory.createExecutionInterceptor(ClasspathInterceptorChainFactory.java:123)

Steps to Reproduce (for bugs)

Below is my AWS lambda function written in Java:

private S3AsyncClient s3AsyncClient;    
public CommandsHandler() {
        s3AsyncClient = S3AsyncClient.create();
}

tried latest version of 2.10.3 in my POM file

<dependency>
            <groupId>software.amazon.awssdk</groupId>
            <artifactId>dynamodb</artifactId>
            <version>${aws.sdk.version}</version>
        </dependency>
        <dependency>
            <groupId>software.amazon.awssdk</groupId>
            <artifactId>sns</artifactId>
            <version>${aws.sdk.version}</version>
        </dependency>
        <dependency>
            <groupId>software.amazon.awssdk</groupId>
            <artifactId>s3</artifactId>
            <version>${aws.sdk.version}</version>
        </dependency>

Context

I am able to instantiate SNS client and DynamoDB client without any problem, but S3 Client failed.

Your Environment

• AWS Java SDK version used: tried 2.10.3, 2.8.7 and 2.5.3
• JDK version used: 1.8
• Operating System and version: Ubuntu 18.04.3 LTS and Amazon Linux workspace

[MarkusKramer]

@shanegu you don’t have to disable jar minimizing. you can work around it with

                <configuration>
                    <createDependencyReducedPom>false</createDependencyReducedPom>
                    <minimizeJar>true</minimizeJar>
                    <filters>
                        <filter>
                            <artifact>software.amazon.awssdk:s3</artifact>
                            <includes>
                                <include>**</include>
                            </includes>
                        </filter>
                    </filters>
                </configuration>

or by explicitly including all classes listed in “execution.interceptors” in your code like EnableTrailingChecksumInterceptor.class.toString()

It would be nice if the AWS SDK would not dynamically load these classes. It makes live with tools that need to statically analyze your code (like the shade plugin or graal’s native image tool) so much easier.

[shanegu]

@zoewangg sorry for late response as well, I found the issue: I ran: find . -name *.jar -print0 | xargs -0 -I '{}' sh -c 'jar tf {} | grep EndpointAddressInterceptor.class && echo {}' Indeed I didn’t find the class, I had maven shade plugin to minimize the jar file, so it was excluded, the reason I had to do this is the cold start issue when using java and I tried to minimize jar file and didn’t expect some of packages from s3 will be excluded, after I unset minimize the jar file in pom, it worked. I did notice my cold start time increased from 5.5 second to 6.5 second and jar file size increased by 4 MB. Closing this issue