AsynchronousDispatcher error

Question

i am getting the error when i try to upload a file based exactly off the example shown here Sample

The error is

Allocate exception for servlet com.testapp.rest.JaxRsActivator: java.lang.RuntimeException: Unable to find a public constructor for class org.jboss.resteasy.core.AsynchronousDispatcher

What can this mean?

Answer 1

If deploying to JBoss 7.x you need to change the scope of your resteasy dependencies to provided. This is because those particular libraries are already included in JBoss as modules:

<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-jaxrs</artifactId>
    <version>2.2.1.GA</version>
    <scope>provided</scope>
</dependency>

<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-multipart-provider</artifactId>
    <version>2.2.0.GA</version>
    <scope>provided</scope>
</dependency>

Answer 2

I was using wildfly 10 to deploy my application when I got this error and tried the above solutions and didn't work for me and finally I had to exclude the jar resteasy-jaxrs using maven exclusions

    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>resteasy-servlet-initializer</artifactId>
        <version>3.0.19.Final</version>
        <scope>provided</scope>
        <exclusions>
            <exclusion>
                <artifactId>resteasy-jaxrs</artifactId>
                <groupId>org.jboss.resteasy</groupId>
            </exclusion>
        </exclusions>
    </dependency>

Answer 3

Like a charm

One more thing, make sure you check for resteasy

$ mvn dependency:tree | grep "resteasy"

[INFO] \- org.jboss.resteasy:resteasy-jaxrs:jar:3.0.10.Final:provided
[INFO]    +- org.jboss.resteasy:jaxrs-api:jar:3.0.10.Final:provided

Answer 4

Maybe it's worth to mention that the RESTeasy documentation has information on how to upgrade the RESTeasy included in JBoss, which as mentioned above can cause some headache if you try to use another version.