slf4j LoggerFactory class definition not found with Gradle - maven

Question

I'm trying to build and run a Spark webserver that uses slf4j logging in IntelliJ. It builds fine (also in IntelliJ) on the computer that was used to originally add logging, but not on my machine.
Here's the full build.gradle file (see project(':webserver') for the part that uses the logger:
buildscript {
repositories {
maven {
url "https://plugins.gradle.org/m2/"
}
}
dependencies {
classpath "gradle.plugin.com.avast.gradle:docker-compose-gradle-plugin:0.3.27"
}
}
subprojects {
repositories {
mavenLocal()
mavenCentral()
jcenter()
}
apply plugin: "java"
apply plugin: "idea"
apply plugin: "checkstyle"
apply plugin: "pmd"
apply plugin: "findbugs"
apply plugin: "application"
apply plugin: "com.avast.gradle.docker-compose"
checkstyle {
configFile = "../config/checkstyle/checkstyle.xml" as File
toolVersion = "6.0"
}
}
project(':webserver') {
mainClassName = "org.passport.webserver.WebServer"
dependencies {
compile project(':core')
compile "com.sparkjava:spark-core:2.6.0"
testCompile 'junit:junit:4.12'
compile group: 'org.json', name: 'json', version: '20090211'
compile group: 'org.slf4j', name: 'slf4j-log4j12', version: '1.6.1'
}
sourceSets {
main {
java {
srcDir 'src/main/java/'
}
}
}
}
project(':customsUI') {
mainClassName = "org.passport.customsui.CustomsUI"
dependencies {
compile project(':core')
testCompile 'junit:junit:4.12'
}
sourceSets {
main {
java {
srcDir 'src/main/java/'
}
}
}
}
project(':handlerUI') {
mainClassName = "org.passport.handlerui.HandlerUI"
dependencies {
compile project(':core')
testCompile 'junit:junit:4.12'
}
sourceSets {
main {
java {
srcDir 'src/main/java/'
}
}
}
}
project(':core') {
mainClassName = "org.passport.core.PassPortChaincode"
dependencies {
compile 'io.grpc:grpc-all:0.13.2'
compile 'commons-cli:commons-cli:1.3.1'
compile 'org.glassfish:javax.json:1.1.0-M1'
compile files('lib/shim-client-1.0.jar')
testCompile 'junit:junit:4.12'
}
sourceSets {
main {
java {
srcDir 'src/main/java/'
}
}
}
}
Here's the code that uses the logger:
package org.passport.webserver;
import org.passport.webserver.endpoints.ContainerClaimDao;
import org.passport.webserver.endpoints.PackageClaimDao;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static spark.Spark.before;
import static spark.Spark.get;
import static spark.Spark.path;
import static spark.Spark.post;
/**
* The server matches requests (routs) and calls the appropriate endpoints.
*/
public final class Server {
private static Logger logger = LoggerFactory.getLogger(Server.class);
private static ContainerClaimDao containers = new ContainerClaimDao();
private static PackageClaimDao packages = new PackageClaimDao();
private Server() {
}
/**
* Starts the router.
* #param args run arguments
*/
public static void main(String[] args) {
path("/containers/:container-id", () -> {
before("/*", (q, a) -> logger.info("Received api call: " + q.url() + "."));
post("", (request, response) -> containers.add(request, response));
get("/container-claims", (request, response) -> containers.get(request, response));
get("/package-claims", (request, response) -> packages.get(request, response));
});
}
}
And here's the error I get:
"C:\Program Files\Java\jdk1.8.0_91\bin\java" -Didea.launcher.port=7534 "-Didea.launcher.bin.path=C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2016.2.4\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_91\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\rt.jar;C:\Users\lover\repositories\passport\webserver\build\classes\main;C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2016.2.4\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain org.passport.webserver.Server
Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.passport.webserver.Server.<clinit>(Server.java:18)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:123)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
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)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 4 more
I've looked at several questions on StackOverflow, but none seem to solve the problem:
java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory - I'm building with gradle, don't think I should have to download/ put some jar in my classpath
ClassNotFoundException: org.slf4j.LoggerFactory - Same as above
NoClassDefFoundError: org/slf4j/Logger - Again jar stuff
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory - I'm not sure whether "fat jars" / ShadowJar apply, and not sure how to modify my build file to use them
NoClassDefFoundError: org/slf4j/LoggerFactory while creating a runnable *.jar with gradle - I've tried refreshing gradle several times, restarting IntelliJ, and even restarting my restarting my computer
Gradle Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory - See below
I've tried the following dependencies:
compile group: 'org.slf4j', name: 'slf4j-log4j12', version: '1.6.1'
compile 'org.slf4j:slf4j-api:1.7.24' and compile 'org.slf4j:slf4j-simple:1.7.24'
compile group: 'org.slf4j', name: 'slf4j-simple', version: '1.6.1'
None of this seems to make a difference. Any ideas?

Answer 1

If you're using Gradle add these 2 lines to your build.gradle dependencies to use Spark 2.6.0
compile "com.sparkjava:spark-core:2.6.0"
compile group: 'org.slf4j', name: 'slf4j-simple', version: '1.7.21'

Answer 2

I ended up deleting my Gradle cache (.gradle folder) and re-downloading everything, which solved the problem.