[logback-user] Issue with LoggerFactory on Java 9

[Mark Raynsford]

On 2018-02-09T18:35:47 +0100
Ceki <ceki at qos.ch> wrote:

> Hi Mark,
> 
> After downloading your project from Github to the logback-io7 foder, I 
> created a lib subfolder and copied logback-*-1.3.0-alpha2.jar and 
> slf4j-api-1.8.0-beta1.jar to that lib directory
> 
> I then ran
> 
> (9) camel ~/logback-io7 >java $ST -cp 
> 'target/logback-20180209-1.0.0.jar;lib/logback-core-1.3.0-alpha2.jar;lib/logback-classic-1.3.0-alpha2.jar;lib/slf4j-api-1.8.0-beta1.jar' 
> com.io7
> m.bugs.logback.Main
> 
> with ST variable defined as
> 
> ST="-Dlogback.statusListenerClass=ch.qos.logback.core.status.OnConsoleStatusListener"
> 
> Running the above command resulted in
> 
> 18:28:21,723 |-INFO in ch.qos.logback.classic.LoggerContext[default] - 
> Could NOT find resource [logback-test.xml]
> 18:28:21,754 |-INFO in ch.qos.logback.classic.LoggerContext[default] - 
> Could NOT find resource [logback.groovy]
> 18:28:21,770 |-INFO in ch.qos.logback.classic.LoggerContext[default] - 
> Could NOT find resource [logback.xml]
> 18:28:21,770 |-INFO in ch.qos.logback.classic.BasicConfigurator at 6321e813 
> - Setting up default configuration.
> 18:28:21.785 [main] DEBUG com.io7m.bugs.logback.Main - hello
> 
> It all looks good to me. BTW, I am running Java version 9.0.1.

I think the jars need to be on the module path (as opposed to the
classpath) to trigger the problem. I've added a run.sh script to the
repos that should be executed after "mvn package". Essentially, it does
this:

cp $HOME/.m2/repository/org/slf4j/slf4j-api/1.8.0-beta1/slf4j-api-1.8.0-beta1.jar target
cp $HOME/.m2/repository/ch/qos/logback/logback-classic/1.3.0-alpha2/logback-classic-1.3.0-alpha2.jar target
cp $HOME/.m2/repository/ch/qos/logback/logback-core/1.3.0-alpha2/logback-core-1.3.0-alpha2.jar target
rm -rf target/classes
java --module-path target --module com.io7m.bugs.logback/com.io7m.bugs.logback.Main

This gives me:

$ ./run.sh
+ cp /home/someone/.m2/repository/org/slf4j/slf4j-api/1.8.0-beta1/slf4j-api-1.8.0-beta1.jar target
+ cp /home/someone/.m2/repository/ch/qos/logback/logback-classic/1.3.0-alpha2/logback-classic-1.3.0-alpha2.jar target
+ cp /home/someone/.m2/repository/ch/qos/logback/logback-core/1.3.0-alpha2/logback-core-1.3.0-alpha2.jar target
+ rm -rf target/classes
+ java --module-path target --module com.io7m.bugs.logback/com.io7m.bugs.logback.Main
Exception in thread "main" java.util.ServiceConfigurationError: ch.qos.logback.classic.spi.Configurator: module ch.qos.logback.classic does not declare `uses`
	at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:588)
	at java.base/java.util.ServiceLoader.checkCaller(ServiceLoader.java:574)
	at java.base/java.util.ServiceLoader.<init>(ServiceLoader.java:503)
	at java.base/java.util.ServiceLoader.load(ServiceLoader.java:1639)
	at ch.qos.logback.classic/ch.qos.logback.classic.util.EnvUtil.loadFromServiceLoader(EnvUtil.java:48)
	at ch.qos.logback.classic/ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:155)
	at ch.qos.logback.classic/ch.qos.logback.classic.spi.LogbackServiceProvider.initializeLoggerContext(LogbackServiceProvider.java:49)
	at ch.qos.logback.classic/ch.qos.logback.classic.spi.LogbackServiceProvider.initialize(LogbackServiceProvider.java:40)
	at org.slf4j/org.slf4j.LoggerFactory.bind(LoggerFactory.java:153)
	at org.slf4j/org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:141)
	at org.slf4j/org.slf4j.LoggerFactory.getProvider(LoggerFactory.java:419)
	at org.slf4j/org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:405)
	at org.slf4j/org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:354)
	at org.slf4j/org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:380)
	at com.io7m.bugs.logback/com.io7m.bugs.logback.Main.<clinit>(Main.java:8)

$ java -version
openjdk version "9"
OpenJDK Runtime Environment (build 9+181)
OpenJDK 64-Bit Server VM (build 9+181, mixed mode)

-- 
Mark Raynsford | http://www.io7m.com

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