Quarkus RESTEasy Reactive Jackons @Blocking Failure should never be restarted

Describe the bug When using the @Blocking annotation on a REST Resource when using the quarkus-resteasy-reactive-jackson extension results in an IllegalStateException: FAILURE: should never be restarted.

Expected behavior A correct response without the IllegalStateException.

Actual behavior The following stacktrace is shown.

java.lang.IllegalStateException: FAILURE: should never be restarted
        at org.jboss.resteasy.reactive.server.handlers.MultiResponseHandler$1.handle(MultiResponseHandler.java:171)
        at org.jboss.resteasy.reactive.server.handlers.MultiResponseHandler$1.handle(MultiResponseHandler.java:166)
        at org.jboss.resteasy.reactive.common.core.AbstractResteasyReactiveContext.run(AbstractResteasyReactiveContext.java:108)
        at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2415)
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1426)
        at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29)
        at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29)
        at java.base/java.lang.Thread.run(Thread.java:834)
        at org.jboss.threads.JBossThread.run(JBossThread.java:501)

To Reproduce

Clone and build the sample project quarkus-resteasy-reactive-jackson-blocking-issue.
Run the application
Run curl -v http://localhost:8080

Environment (please complete the following information):

Output of uname -a or ver:

Darwin mac.local 17.7.0 Darwin Kernel Version 17.7.0: Sun Jun  2 20:31:42 PDT 2019; root:xnu-4570.71.46~1/RELEASE_X86_64 x86_64

Output of java -version:

openjdk version "11.0.7" 2020-04-14
OpenJDK Runtime Environment GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02)
OpenJDK 64-Bit Server VM GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02, mixed mode, sharing)

GraalVM version (if different from Java): -
Quarkus version or git rev:
```
1.10.5.Final
```

Build tool (ie. output of mvnw --version or gradlew --version):

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /Volumes/Data/Users/basp/.sdkman/candidates/maven/current
Java version: 11.0.7, vendor: GraalVM Community, runtime: /Volumes/Data/Users/basp/.sdkman/candidates/java/20.1.0.r11-grl
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.13.6", arch: "x86_64", family: "mac"

https://github.com/quarkusio/quarkus/issues/14486

$upstream:14486$

snowdrop-zen / quarkus

Quarkus RESTEasy Reactive Jackons @Blocking Failure should never be restarted #243