Excessive WARN log noise in 0.9.11

Version 0.9.11 generates a ton of noise in the logs, but only when used in a Fat Jar, such as:

WARN  [2018-11-07 09:47:39,252] org.reflections.Reflections: could not get type for name org.junit.runners.BlockJUnit4ClassRunner from any class loader
! java.lang.ClassNotFoundException: org.junit.runners.BlockJUnit4ClassRunner
! at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
! at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
! at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)

I’m using the gradle plugin to build a shadow jar (fat jar) id "com.github.johnrengelman.shadow" version "4.0.2"

See also https://groups.google.com/forum/#!topic/dropwizard-user/I0K4e0APudY for another take

Downgrading to 0.9.10 avoids these excessive log messages. dropwizard-swagger uses this as a transitive dependency. Here’s a workaround for gradle:

ext {
        dropwizardVersion = "1.3.7"
        orgReflectionsVersion = "0.9.10"
}
....
dependencies {
....
    compile("com.smoketurner:dropwizard-swagger:${dropwizardVersion}-1") {
        // version 0.9.11 generates tons of noise in WARN logs about types it can't find:  https://groups.google.com/forum/#!topic/dropwizard-user/I0K4e0APudY
        exclude(group: "org.reflections")
    }
    compile "org.reflections:reflections:${orgReflectionsVersion}"
....
}

[darewreck54]

If I downgrade to 0.9.10, I’ll get the following error

INFO  [2020-05-02 16:53:18,442] io.dropwizard.assets.AssetsBundle: Registering AssetBundle with name: swagger-oauth2-connect for path /oauth2-redirect.html/*
java.lang.NoSuchMethodError: org.reflections.util.ConfigurationBuilder.setExpandSuperTypes(Z)Lorg/reflections/util/ConfigurationBuilder;
        at io.swagger.jaxrs.config.BeanConfig.classes(BeanConfig.java:284)
        at io.swagger.jaxrs.config.BeanConfig.scanAndRead(BeanConfig.java:250)
        at io.swagger.jaxrs.config.BeanConfig.setScan(BeanConfig.java:231)
        at io.federecio.dropwizard.swagger.SwaggerBundleConfiguration.build(SwaggerBundleConfiguration.java:318)
        at io.federecio.dropwizard.swagger.SwaggerBundle.run(SwaggerBundle.java:80)
        at io.federecio.dropwizard.swagger.SwaggerBundle.run(SwaggerBundle.java:46)
        at io.dropwizard.setup.Bootstrap.run(Bootstrap.java:199)
        at io.dropwizard.cli.EnvironmentCommand.run(EnvironmentCommand.java:43)
        at io.dropwizard.cli.ConfiguredCommand.run(ConfiguredCommand.java:87)
        at io.dropwizard.cli.Cli.run(Cli.java:78)

This is with a gradle of

    compile("io.dropwizard:dropwizard-core:2.0.6") {
        exclude group: "org.reflections", module: "reflections"
    }
    compile group: 'com.smoketurner', name: 'dropwizard-swagger', version: '2.0.0-1'
    compile group: 'io.swagger.core.v3', name: 'swagger-core', version: '2.1.2'
    compile group: 'ru.vyarus', name: 'dropwizard-guicey', version: '5.0.1'
    compile group: 'com.google.inject', name: 'guice', version: '4.2.3'
    implementation('org.reflections:reflections:0.9.10') {
        force = true
    }

If I use either 0.9.11 or 0.9.12, I get the following error:

NFO  [2020-05-02 16:27:49,677] org.reflections.Reflections: Reflections took 3310 ms to scan 1 urls, producing 46190 keys and 93336 values 
WARN  [2020-05-02 16:27:49,699] org.reflections.Reflections: could not get type for name org.zeroturnaround.javarebel.ClassEventListener from any class loader
! java.lang.ClassNotFoundException: org.zeroturnaround.javarebel.ClassEventListener
! at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
! at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
! at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
! at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
! at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:388)
! ... 14 common frames omitted
! Causing: org.reflections.ReflectionsException: could not get type for name org.zeroturnaround.javarebel.ClassEventListener
! at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:390)
! at org.reflections.Reflections.expandSuperTypes(Reflections.java:381)
! at org.reflections.Reflections.<init>(Reflections.java:126)
! at io.swagger.jaxrs.config.BeanConfig.classes(BeanConfig.java:288)
! at io.swagger.jaxrs.config.BeanConfig.scanAndRead(BeanConfig.java:250)
! at io.swagger.jaxrs.config.BeanConfig.setScan(BeanConfig.java:231)
! at io.federecio.dropwizard.swagger.SwaggerBundleConfiguration.build(SwaggerBundleConfiguration.java:318)
! at io.federecio.dropwizard.swagger.SwaggerBundle.run(SwaggerBundle.java:80)
! at io.federecio.dropwizard.swagger.SwaggerBundle.run(SwaggerBundle.java:46)
! at io.dropwizard.setup.Bootstrap.run(Bootstrap.java:199)
! at io.dropwizard.cli.EnvironmentCommand.run(EnvironmentCommand.java:43)
! at io.dropwizard.cli.ConfiguredCommand.run(ConfiguredCommand.java:87)
! at io.dropwizard.cli.Cli.run(Cli.java:78)
! at io.dropwizard.Application.run(Application.java:94)
! at 
WARN  [2020-05-02 16:27:49,702] org.reflections.Reflections: could not get type for name groovy.lang.Closure from any class loader
! java.lang.ClassNotFoundException: groovy.lang.Closure
! at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
! at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
! at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
! at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
! at org.reflections.ReflectionUtils.forName(ReflectionUtils.java:388)

I also tried excluding guice and findbugs from the reflectionand still the same error:

    compile("org.reflections:reflections:0.9.10") {
        // version 0.9.11 generates tons of noise in WARN logs about types it can't find:  https://groups.google.com/forum/#!topic/dropwizard-user/I0K4e0APudY
        exclude(group: "com.google.guava")
        exclude(group: "com.google.code.findbugs")
    }

error;

java.lang.NoSuchMethodError: org.reflections.util.ConfigurationBuilder.setExpandSuperTypes(Z)Lorg/reflections/util/ConfigurationBuilder;
        at io.swagger.jaxrs.config.BeanConfig.classes(BeanConfig.java:284)
        at io.swagger.jaxrs.config.BeanConfig.scanAndRead(BeanConfig.java:250)
        at io.swagger.jaxrs.config.BeanConfig.setScan(BeanConfig.java:231)
        at io.federecio.dropwizard.swagger.SwaggerBundleConfiguration.build(SwaggerBundleConfiguration.java:318)
        at io.federecio.dropwizard.swagger.SwaggerBundle.run(SwaggerBundle.java:80)
        at io.federecio.dropwizard.swagger.SwaggerBundle.run(SwaggerBundle.java:46)
        at io.dropwizard.setup.Bootstrap.run(Bootstrap.java:199)
        at io.dropwizard.cli.EnvironmentCommand.run(EnvironmentCommand.java:43)
        at io.dropwizard.cli.ConfiguredCommand.run(ConfiguredCommand.java:87)
        at io.dropwizard.cli.Cli.run(Cli.java:78)
        at io.dropwizard.Application.run(Application.java:94)

Any help appreciated Thanks, Derek

[tatianajiselle]

came to say im getting the same thing. Its something to do with the version of DropWizard (im using 2.0.10) and the version of the Swagger bundle (2.0.0) and conflicting reflections packages.

When i drop to these version i see no errors: <dropwizard.version>1.3.8</dropwizard.version> <dropwizard-swagger.version>1.3.7-1</dropwizard-swagger.version>