swagger-jaxrs io.swagger.jaxrs.config.BeanConfig.setScan() throws exception in reflection of ehcache library and classes when running via -all.jar as classes are missing

Description If you init Swagger using BeanConfig.setScan(true) (see: https://github.com/swagger-api/swagger-core/blob/master/modules/swagger-jaxrs/src/main/java/io/swagger/jaxrs/config/BeanConfig.java#L220) it will throw many exceptions in case you are using generated Beans as response objects.

See exception below. It fails on those classes as it seems they are .classes_terracotta

The issue is that certain classes are not packaged into the -all jar. I can unpack the -all jar and indeed classes are missing that are referenced in the project classpath.

Versions: swagger-core version 1.5.13 (I also tried 1.5.17, had same issue, but slight different stack trace) ehcache version is 2.10.3 CXF version is 3.1.9

Ehcache: This error happens every time scan is invoked.

It obviously has something to do with the way the ehcache library is using some overwrite within their rest-management-private-classpath package.

However ehcache is a common library for caching and often you can’t really prevent it. In the case of CXF if comes automatically, there is no way to exclude it.

Exception when doing BeanConfig.setScan(true):

2017-12-22 10:27:01,759 14438 WARN [main] [] o.r.Reflections - could not get type for name net.sf.ehcache.management.resource.services.CachesResourceServiceImpl from any class loader
org.reflections.ReflectionsException: could not get type for name net.sf.ehcache.management.resource.services.CachesResourceServiceImpl
        at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:390)
        at org.reflections.ReflectionUtils.forNames(ReflectionUtils.java:409)
        at org.reflections.Reflections.getTypesAnnotatedWith(Reflections.java:433)
        at org.reflections.Reflections.getTypesAnnotatedWith(Reflections.java:418)
        at io.swagger.jaxrs.config.BeanConfig.classes(BeanConfig.java:277)
        at io.swagger.jaxrs.config.BeanConfig.scanAndRead(BeanConfig.java:240)
        at io.swagger.jaxrs.config.BeanConfig.setScan(BeanConfig.java:221)
        at my.company.myproject.myapi.MyapiApplication.swagger(MyapiApplication.java:115)
        at my.company.myproject.myapi.MyapiApplication.run(MyapiApplication.java:70)
        at my.company.myproject.myapi.MyapiApplication.run(MyapiApplication.java:30)
        at io.dropwizard.cli.EnvironmentCommand.run(EnvironmentCommand.java:43)
        at io.dropwizard.cli.ConfiguredCommand.run(ConfiguredCommand.java:85)
        at io.dropwizard.cli.Cli.run(Cli.java:74)
        at io.dropwizard.Application.run(Application.java:89)
        at my.company.myproject.myapi.MyapiApplication.main(MyapiApplication.java:38)
Caused by: java.lang.ClassNotFoundException: net.sf.ehcache.management.resource.services.CachesResourceServiceImpl
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:388)
        ... 14 common frames omitted
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:388)
        ... 14 common frames omitted

[viachm]

Had do downgrade org.reflections with some exclusions. Here is a pom.xml that worked for me:

<dependency>
    <groupId>org.reflections</groupId>
    <artifactId>reflections</artifactId>
    <version>0.9.10</version>
    <exclusions>
        <exclusion>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
        </exclusion>
        <exclusion>
            <groupId>com.google.code.findbugs</groupId>
            <artifactId>annotations</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>com.smoketurner</groupId>
    <artifactId>dropwizard-swagger</artifactId>
    <version>1.1.2-1</version>
    <exclusions>
        <exclusion>
            <groupId>org.reflections</groupId>
            <artifactId>reflections</artifactId>
        </exclusion>
    </exclusions>
</dependency>

[tyagiakhilesh]

This works for me as well.

            <dependency>
                <groupId>io.swagger</groupId>
                <artifactId>swagger-jaxrs</artifactId>
                <version>1.5.18</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.reflections</groupId>
                        <artifactId>reflections</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>org.reflections</groupId>
                <artifactId>reflections</artifactId>
                <version>0.9.10</version>
            </dependency>

Now, I am not sure if my App is problem or reflection is ? I guess reflection needs some reflection now… 😃