quarkus: Deadlock using Caffeine cache and context propagation

Describe the bug When using quarkus-cache together with quarkus-smallrye-context-propagation extension, a method annotated with @CacheResult deadlocks with 200 or more concurrent calls

Expected behavior No deadlock

Actual behavior When using a tool like jMeter to submit 200 or more simultaneos calls, all threads immediately deadlocks on a method annotated with @CacheResult Removing the extension quarkus-smallrye-context-propagation, the issue doesn’t occur anymore

To Reproduce

I created an example project to reproduce this issue: https://github.com/sivelli/quarkus-cache-deadlock But the code is really simple:

@ApplicationScoped
class ExampleCache {
    @CacheResult(cacheName = "test")
    public Integer getLength(String param) {
        return param.length();
    }
}

@Path("/resteasy/hello")
public class ExampleResource {
    @Inject
    ExampleCache cache;

    AtomicInteger counter = new AtomicInteger(); 

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String hello(@QueryParam("name") String name) {
        System.out.println("request received " + counter.incrementAndGet());
        return "hello " + name + " Length:" + cache.getLength(Objects.toString(name, ""));
    }
}

In pom.xml, if the following dependency is present, the problem happens when making 200 calls simultaneosly

    <dependency>
        <groupId>io.quarkus</groupId>
        <artifactId>quarkus-smallrye-context-propagation</artifactId>
    </dependency>    

Removing this dependency, no deadlock happens

Steps to reproduce the behavior:

1. Start the application
2. Submit 200 or more simultaneous requests (run testCache.jmx)

Environment:

• Output of uname -a or ver: Microsoft Windows [versão 10.0.18363.657]
• Output of java -version: openjdk version “11.0.8” 2020-07-14 OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.8+10) OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.8+10, mixed mode)
• Quarkus version: 1.9.2.Final
• Output of mvn -version Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f) Maven home: D:\Projetos\Java\apache-maven-3.6.3\bin.. Java version: 11.0.8, vendor: Red Hat, Inc., runtime: D:\Projetos\Java\jdk-11.0.8.10-2 Default locale: pt_BR, platform encoding: Cp1252 OS name: “windows 10”, version: “10.0”, arch: “amd64”, family: “windows”