AOT/native compilation not working with FeignClient and AOP

[CC007]

Describe the bug
I read that starting spring-cloud 2022.0.0, you can use native compilation. I'm using 2022.0.2 (spring-cloud-starter-openfeign:4.0.2), but when I use an OpenFeign client with native compilation, I get the following error:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'boxedHelloController': Unsatisfied dependency expressed through field 'helloWorldClient': Error creating bean with name 'nl.cqit.function.poc.java.helloworld.controller.HelloWorldClient': Post-processing of FactoryBean's singleton object failed
        at org.springframework.beans.factory.aot.AutowiredFieldValueResolver.resolveValue(AutowiredFieldValueResolver.java:195) ~[na:na]
        at org.springframework.beans.factory.aot.AutowiredFieldValueResolver.resolveAndSet(AutowiredFieldValueResolver.java:167) ~[na:na]
        at nl.cqit.function.poc.java.boxedhello.controller.BoxedHelloController__Autowiring.apply(BoxedHelloController__Autowiring.java:15) ~[na:na]
        at org.springframework.beans.factory.support.InstanceSupplier$1.get(InstanceSupplier.java:83) ~[na:na]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.obtainInstanceFromSupplier(DefaultListableBeanFactory.java:947) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.obtainFromSupplier(AbstractAutowireCapableBeanFactory.java:1214) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1158) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:560) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:973) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:917) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:584) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[boxedhello-app.exe:3.0.5]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[boxedhello-app.exe:3.0.5]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[boxedhello-app.exe:3.0.5]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:310) ~[boxedhello-app.exe:3.0.5]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1304) ~[boxedhello-app.exe:3.0.5]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1293) ~[boxedhello-app.exe:3.0.5]
        at nl.cqit.function.poc.java.boxedhello.Main.main(Main.java:12) ~[boxedhello-app.exe:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'nl.cqit.function.poc.java.helloworld.controller.HelloWorldClient': Post-processing of FactoryBean's singleton object failed
        at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:108) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1823) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1273) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:259) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1640) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1597) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1337) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.aot.AutowiredFieldValueResolver.resolveValue(AutowiredFieldValueResolver.java:189) ~[na:na]
        ... 22 common frames omitted
Caused by: com.oracle.svm.core.jdk.UnsupportedFeatureError: Proxy class defined by interfaces [interface nl.cqit.function.poc.java.helloworld.controller.HelloWorldClient, interface org.springframework.aop.SpringProxy, interface org.springframework.aop.framework.Advised, interface org.springframework.core.DecoratingProxy] not found. Generating proxy classes at runtime is not supported. Proxy classes need to be defined at image build time by specifying the list of interfaces that they implement. To define proxy classes use -H:DynamicProxyConfigurationFiles=<comma-separated-config-files> and -H:DynamicProxyConfigurationResources=<comma-separated-config-resources> options.
        at org.graalvm.nativeimage.builder/com.oracle.svm.core.util.VMError.unsupportedFeature(VMError.java:89) ~[na:na]
        at org.graalvm.nativeimage.builder/com.oracle.svm.core.reflect.proxy.DynamicProxySupport.getProxyClass(DynamicProxySupport.java:171) ~[na:na]
        at java.base@19.0.2/java.lang.reflect.Proxy.getProxyConstructor(Proxy.java:47) ~[boxedhello-app.exe:na]
        at java.base@19.0.2/java.lang.reflect.Proxy.newProxyInstance(Proxy.java:1037) ~[boxedhello-app.exe:na]
        at org.springframework.aop.framework.JdkDynamicAopProxy.getProxy(JdkDynamicAopProxy.java:123) ~[na:na]
        at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110) ~[na:na]
        at org.springframework.aop.framework.AbstractAdvisingBeanPostProcessor.postProcessAfterInitialization(AbstractAdvisingBeanPostProcessor.java:127) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:434) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.postProcessObjectFromFactoryBean(AbstractAutowireCapableBeanFactory.java:1885) ~[boxedhello-app.exe:6.0.7]
        at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:105) ~[boxedhello-app.exe:6.0.7]
        ... 32 common frames omitted

Sample
Here is my API:

package nl.cqit.function.poc.java.helloworld.api;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.media.Content;
import io.swagger.v3.oas.annotations.media.Schema;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.validation.Valid;
import nl.cqit.function.poc.java.helloworld.api.model.Person;
import nl.cqit.function.poc.java.helloworld.api.model.Problem;
import org.springframework.http.HttpStatus;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseStatus;

@Validated
@Tag(
    name = "HelloWorld",
    description = "the HelloWorld API"
)
public interface HelloWorldApi {
    @Operation(
        operationId = "sayHello",
        summary = "The main function",
        description = "This endpoint will call sayHello",
        tags = {"HelloWorld"},
        responses = {@ApiResponse(
    responseCode = "200",
    description = "OK",
    content = {@Content(
    mediaType = "application/json",
    schema = @Schema(
    implementation = String.class
)
), @Content(
    mediaType = "application/problem+json",
    schema = @Schema(
    implementation = String.class
)
)}
), @ApiResponse(
    responseCode = "400",
    description = "input validation failed",
    content = {@Content(
    mediaType = "application/json",
    schema = @Schema(
    implementation = Problem.class
)
), @Content(
    mediaType = "application/problem+json",
    schema = @Schema(
    implementation = Problem.class
)
)}
)}
    )
    @RequestMapping(
        method = {RequestMethod.POST},
        value = {"/helloWorld"},
        produces = {"application/json", "application/problem+json"},
        consumes = {"application/json"}
    )
    @ResponseStatus(HttpStatus.OK)
    String sayHello(@Parameter(name = "Person",description = "",required = true) @RequestBody @Valid Person var1);
}

And here is my Feign client:

package nl.cqit.function.poc.java.helloworld.controller;

import nl.cqit.function.poc.java.helloworld.api.HelloWorldApi;
import org.springframework.cloud.openfeign.FeignClient;

@FeignClient(name = "helloWorldClient", url = "http://localhost:8080")
public interface HelloWorldClient extends HelloWorldApi {
}

I'm using it like this:

package nl.cqit.function.poc.java.boxedhello.impl;

import nl.cqit.function.poc.java.boxedhello.api.BoxedHelloApi;
import nl.cqit.function.poc.java.boxedhello.api.model.Person;
import nl.cqit.function.poc.java.helloworld.controller.HelloWorldClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class BoxedHelloImpl implements BoxedHelloApi {

    @Autowired
    private HelloWorldClient helloWorldClient;

    @Override
    public String sayHello(Person person) {
        String greeting = helloWorldClient.sayHello(map(person));
        String horizontalEdge = "+" + "-".repeat(greeting.length() + 2) + "+";
        return horizontalEdge + "\n| " + greeting + " |\n" + horizontalEdge;
    }

    private nl.cqit.function.poc.java.helloworld.api.model.Person map(Person person) {
        return new nl.cqit.function.poc.java.helloworld.api.model
                .Person(person.getFirstName())
                .lastName(person.getLastName());
    }
}

With this as my Main class:

package nl.cqit.function.poc.java.boxedhello;

import nl.cqit.function.poc.java.helloworld.controller.HelloWorldClient;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;

@EnableFeignClients(basePackageClasses = {HelloWorldClient.class})
@SpringBootApplication
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class, args);
    }
}

Using this profile for native compilation in my pom.xml:

<profiles>
        <profile>
            <id>native</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-maven-plugin</artifactId>
                        <configuration>
                            <image>
                                <builder>paketobuildpacks/builder:tiny</builder>
                                <env>
                                    <BP_NATIVE_IMAGE>true</BP_NATIVE_IMAGE>
                                </env>
                            </image>
                        </configuration>
                        <executions>
                            <execution>
                                <id>process-aot</id>
                                <goals>
                                    <goal>process-aot</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                    <plugin>
                        <groupId>org.graalvm.buildtools</groupId>
                        <artifactId>native-maven-plugin</artifactId>
                        <configuration>
                            <classesDirectory>${project.build.outputDirectory}</classesDirectory>
                            <metadataRepository>
                                <enabled>true</enabled>
                            </metadataRepository>
                            <requiredVersion>22.3</requiredVersion>
                        </configuration>
                        <executions>
                            <execution>
                                <id>build-native</id>
                                <goals>
                                    <goal>compile-no-fork</goal>
                                </goals>
                                <phase>package</phase>
                            </execution>
                            <execution>
                                <id>add-reachability-metadata</id>
                                <goals>
                                    <goal>add-reachability-metadata</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>

Is this a bug or am I missing something?

[Rocker93]

This issue started occurring after upgrading to Spring Boot 3.0.6 from 3.0.5 so it seems to be some regression bug. Unfortunately I have not been able to track down what causes it.

[CC007]

I was able to get somewhat further when manually adding the aot hint for a proxy for the client interface. It now allows the application to start, albeit slowly, due to a missing resource (not at my pc atm. I'll post the specific logs later), but it can't find the HttpMessageConverter when trying to use the client. I'll see if I can make a public git repo available demonstrating the issues, when I have time.

[CC007]

@Rocker93 I am actually using 3.0.5

[OlgaMaciaszek]

Hello, @CC007 @Rocker93 , if you could provide a link to a sample, that would be helpful. We do have a working sample here. I will look into the code you've provided anyway, but will need some time as we have various issues queued up at this point.

[CC007]

@OlgaMaciaszek
I made my repo public for now. You can find it here: https://github.com/CodeQualIT/CQITFunctions

[OlgaMaciaszek]

Thanks a lot, @CC007. Should be able to get to it around 8th of May.

[CC007]

No problem. If you have any questions, feel free to reply here or message me on Discord: cc007#2753

[CC007]

Also, one thing I noticed is that when org.springframework.cloud.client.HostInfoEnvironmentPostProcessor is trying to get the config for spring.cloud.inetutils, used in the instantiation of org.springframework.cloud.commons.util.InetUtils on line 60 of the post processor, that the config isn't loaded correctly.

InetUtils in org.springframework.cloud.commons.util.UtilAutoConfiguration doesn't seem to have the same issue, because that one seems to get fully initialized before use.

This leads to a significant startup delay, because I'm using a vEthernet (External switch) adapter from hyper-v to route my internet (this was needed to get LAN IP addresses for my hyper-v VMs).
Adding...

spring:
  cloud:
    inetutils:
      preferred-networks:
        - 192.168

...should have fixed this, but due to the config not getting picked up in the post processor, the startup delay is not prevented.

This happened even without native compilation.

[CC007]

I think the issue in my previous comment is out of scope, so I created an issue in the appropriate issue tracker: spring-cloud/spring-cloud-commons#1233

[CC007]

FYI: I manually added https://github.com/CodeQualIT/CQITFunctions/blob/master/pocs/boxedhello-project/boxedhello-generated/boxedhello-clients/boxedhello-helloworld-client/src/main/java/nl/cqit/function/poc/java/boxedhello/services/helloworld/HelloWorldServiceRuntimeHints.java as a partial workaround. This makes it so that the application starts, but it still causes issues when calling the client. Also, I'd expect these runtime hints for feign clients to be automatically added by openfeign, without user intervention.