NoClassDefFoundError: Logging Interceptor v3.12.0

[adam-hurwitz]

Issue

After adding the Square Okhttp Logging Interceptor library to my Kotlin app I am experiencing the following error which I think may be due to a Guava dependency conflict. I've created a StackOverflow post as well.

Error

Exception in thread "Timer-0" java.lang.NoClassDefFoundError: okhttp3/logging/HttpLoggingInterceptor
    at utils.Retrofit.retrofitBuilder(Retrofit.kt:28)
    at utils.Retrofit.<clinit>(Retrofit.kt:19)
    at content.ContentRequestsKt.getEventRegistryContent(ContentRequests.kt:40)
    at content.Task.retrieveAndSaveContent(ContentTasks.kt:146)
    at content.Task.run(ContentTasks.kt:57)
    at java.base/java.util.TimerThread.mainLoop(Timer.java:556)
    at java.base/java.util.TimerThread.run(Timer.java:506)
Caused by: java.lang.ClassNotFoundException: okhttp3.logging.HttpLoggingInterceptor
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 7 more

Setup

build.gradle (dependency scan)

buildscript {
    ext.kotlin_version = '1.3.11'
    ext.junitJupiterVersion  = '5.3.2'

    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'org.junit.platform:junit-platform-gradle-plugin:1.0.3'
    }
}

plugins {
    id 'java'
    id 'org.jetbrains.kotlin.jvm' version '1.2.51'
}

version '1.0-SNAPSHOT'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
    testImplementation group: 'junit', name: 'junit', version: '5.3.2'
    // JUnit Jupiter API and TestEngine implementation
    testImplementation("org.junit.jupiter:junit-jupiter-api:${junitJupiterVersion}")
    testRuntime("org.junit.jupiter:junit-jupiter-engine:${junitJupiterVersion}")
    testImplementation "org.assertj:assertj-core:3.11.1"
    // To avoid compiler warnings about @API annotations in JUnit code
    testCompileOnly 'org.apiguardian:apiguardian-api:1.0.0'
    implementation 'com.squareup.retrofit2:retrofit:2.5.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.5.0'
    implementation 'com.squareup.retrofit2:adapter-rxjava:2.5.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.12.0'
    implementation 'io.reactivex.rxjava2:rxjava:2.2.4'
    implementation 'com.google.firebase:firebase-admin:6.6.0'
    implementation 'com.google.apis:google-api-services-youtube:v3-rev206-1.25.0'
}

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

Retrofit.kt

package utils

import okhttp3.OkHttpClient
import okhttp3.logging.HttpLoggingInterceptor
import okhttp3.logging.HttpLoggingInterceptor.Level
import retrofit2.Retrofit
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory
import retrofit2.converter.gson.GsonConverterFactory
import utils.Enums.EnvironmentType.PRODUCTION
import utils.EnvironmentType.environmentType

object Retrofit {

    val eventRegistryRetrofit: Retrofit
    val youTubeRetrofit: Retrofit

    init {
        eventRegistryRetrofit = retrofitBuilder(EVENTREGISTRY_BASE_URL)
        youTubeRetrofit = retrofitBuilder(YOUTUBE_BASE_URL)
    }

    /**
     * Build Retrofit object based on source.
     */
    fun retrofitBuilder(baseUrl: String): Retrofit {
        val debugOkHttpClient =
            okhttp3.OkHttpClient.Builder().addInterceptor(HttpLoggingInterceptor().setLevel(Level.BASIC)).build()
    return Retrofit.Builder().addConverterFactory(GsonConverterFactory.create())
            .baseUrl(baseUrl)
            .client(if (environmentType == PRODUCTION) OkHttpClient() else debugOkHttpClient)
            .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
            .build()
    }
}

Attempted Solutions

1. Rebuilding Jar Artifact.
2. Rebuilding project.
3. Invalidating IntelliJ cache and restarting IDE.
4. Re-syncing Gradle file.
5. Explicitly define guava and com.google.api libraries.
6. Excluding older versions of guava from libraries. (dependency scan)

build.gradle

...
dependencies {
    implementation "com.google.guava:guava:27.0.1-jre"
    implementation ("com.google.api:gax:1.33.1") {
        exclude group: "com.google.guava", module: "guava"
    } 
    implementation ("com.google.api:gax-grpc:1.33.1") {
        exclude group: "com.google.guava", module: "guava"
    }
    ...
    implementation ('com.squareup.okhttp3:logging-interceptor:3.12.0') {
        exclude group: "com.google.guava", module: "guava"
    }
    ...
}
...

[swankjesse]

Unclear what action we would take here.

[adam-hurwitz]

@swankjesse, the action is looking into if and how the com.squareup.okhttp3:logging-interceptor:3.12.0 library is creating breaking dependency conflicts.

Judging from similar exception's with other libraries in the past, this may be regarding Square's dependency / sub-dependencies with Google's Guava library.

[dave-r12]

@AdamSHurwitz I copied/pasted the files you provided and had to fix a few compiler issues. But it seems working for me. Post a complete example?

[adam-hurwitz]

@dave-r12 Thank you for investigating! This leads me to believe it is an issue with the build environment. What Project SDK (File > Project Structure > Project SDK) are you using?

My Project SDK: IntelliJ IDEA Community Edition IC-183.4284.148

Currently the existing code is not open source friendly so I will need to create a new sample app in order to share if it is not an environment fix.

[dave-r12]

@AdamSHurwitz I don't follow. I downloaded that IntelliJ version and it's still working. Also I'm building with OpenJDK11.

[adam-hurwitz]

@dave-r12, interesting. It seems the build environment may not be the issue then. I will create a new app to share if the problem persists.