Resteasy 3.5.0.Final on App Engine standard env - NoSuchFieldError SERVER_SENT_EVENTS_TYPE

I'm posting @NicoNes's answer I received in Github

Hi @freddyboucher I don't think that this commit is responsible of the NoSuchFieldError you are dealing with. Resteasy 3.1.4.Final is an implementation of the JAX-RS-API 2.0.1 spec whereas 3.5.1.Final is an impl of the JAX-RS-API 2.1 spec. And the missing field you are talking about is coming from the javax.ws.rs.core.MediaType in JAX-RS-API 2.1. So can you please be sure that your runtime execution does not embed the wrong version o the JAX-RS-API ?

Let me know.

-Nicolas

And he was right, I had in my pom.xml:

  <dependencyManagement>
      <dependencies>
        <dependency>
          <groupId>javax.ws.rs</groupId>
          <artifactId>javax.ws.rs-api</artifactId>
          <version>2.0.1</version>
        </dependency>
      </dependencies>
  </dependencyManagement>

Upgrading to 2.1, fixed my issue!

I had the same problem.

I have solved it by deleting org.jboss.resteasy.jaxrs-api.3.0.12.Final from my pom file.

Hope that will solve your problem.

I got same error, solved it by excluding the jar in pom.xml

<dependencies>
          <dependency>
          [...]
            <exclusions>
                <exclusion>
                    <groupId>javax.ws.rs</groupId>
                    <artifactId>jsr311-api</artifactId>
                </exclusion>
            </exclusions>
  </dependency>
        </dependencies>