[slf4j-dev] SLF4J 1.8 on JVMs < 9

[Ceki]

Hi Thorsten,

Could you please create a JIRA issue for this problem?

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Ceki

On 18.02.2019 16:08, Thorsten Heit wrote:
> Hi,
> 
> I just joined this list, so first hi from Germany ;-)
> 
> When I use slf4j-1.8.0-beta2 in an application that is being deployed to 
> our Websphere 9 server, I see error messages in the deployment manager 
> console:
> 
> 
> (...)
> [2/18/19 15:51:31:862 CET] 000022bd WSModuleDescr E   WSWS7011E: The 
> configuration for the myapp-war-2019.4.0-SNAPSHOT.war application module 
> cannot load correctly.
> The following error occurred: 
>   com.ibm.ws.metadata.annotations.AnnotationException: Annotation 
> processing failed for class:  module-info.class
>          at 
> com.ibm.ws.metadata.annotations.AnnotationConfigReader.getAnnotationData(AnnotationConfigReader.java:883) 
> 
>          at 
> com.ibm.ws.metadata.annotations.AnnotationConfigReader.getAnnotationDataForZippedArchive(AnnotationConfigReader.java:766) 
> 
>          at 
> com.ibm.ws.metadata.annotations.AnnotationConfigReader.getAnnotationData(AnnotationConfigReader.java:696) 
> 
>          at 
> com.ibm.ws.metadata.annotations.AnnotationConfigReader.populateModuleData(AnnotationConfigReader.java:353) 
> 
>          at 
> com.ibm.ws.metadata.MetaDataOrchestrator.getModuleData(MetaDataOrchestrator.java:112) 
> 
>          at 
> com.ibm.ws.websvcs.annotations.collector.WASAnnotationCollector.getMDO(WASAnnotationCollector.java:258) 
> 
>          at 
> com.ibm.ws.websvcs.annotations.collector.WASAnnotationCollector.collect(WASAnnotationCollector.java:146) 
> 
>          at 
> com.ibm.ws.websvcs.desc.WSModuleDescriptorImpl.getClassDataObjects(WSModuleDescriptorImpl.java:1458) 
> 
>          at 
> com.ibm.ws.websvcs.desc.WSModuleDescriptorImpl.initDBCMap(WSModuleDescriptorImpl.java:2153) 
> 
>          at 
> com.ibm.ws.websvcs.desc.WSModuleDescriptorImpl.buildJAXWSServiceRefs(WSModuleDescriptorImpl.java:1137) 
> 
>          at 
> com.ibm.ws.websvcs.desc.WSModuleDescriptorImpl._containsWebServiceClients(WSModuleDescriptorImpl.java:639) 
> 
>          at 
> com.ibm.ws.websvcs.desc.WSModuleDescriptorImpl.containsWebServiceClients(WSModuleDescriptorImpl.java:611) 
> 
>          at 
> com.ibm.ws.websvcs.deploy.WSCacheWriter.writeModuleCache(WSCacheWriter.java:583) 
> 
>          at 
> com.ibm.ws.websvcs.deploy.WSCacheWriter.writeApplicationCache(WSCacheWriter.java:242) 
> 
>          at 
> com.ibm.ws.websvcs.deploy.WSCacheWriter.writeApplicationCache(WSCacheWriter.java:167) 
> 
>          at 
> com.ibm.ws.websvcs.deploy.PersistentStorageInstallSaveTask.performTask(PersistentStorageInstallSaveTask.java:196) 
> 
>          at 
> com.ibm.ws.management.application.sync.AppBinaryProcessor$ExpandApp.expand(AppBinaryProcessor.java:1770) 
> 
>          at 
> com.ibm.ws.management.application.sync.AppBinaryProcessor$AppBinThread.run(AppBinaryProcessor.java:1276) 
> 
>          at java.lang.Thread.run(Thread.java:811)
> Caused by: java.lang.IllegalArgumentException
>          at org.objectweb.asm.ClassReader.<init>(Unknown Source)
>          at org.objectweb.asm.ClassReader.<init>(Unknown Source)
>          at org.objectweb.asm.ClassReader.<init>(Unknown Source)
>          at 
> com.ibm.ws.metadata.annotations.AnnotationConfigReader.getAnnotationData(AnnotationConfigReader.java:836) 
> 
>          ... 18 more
> (...)
> 
> Switching back to the older 1.7.25 version lets this error message 
> disappear.
> 
> The reason is that Websphere uses Java 8 which cannot parse / process 
> the module-info.class that was compiled with Java 9.
> 
> 
> Solution for these kinds of problems:
> Move the class to META-INF/versions/9 and mark the resulting Jar as a 
> multi-release. See [1] for how to do this.
> 
> 
> What do you think?
> I can create a pull request on Github if you like.
> 
> 
> Regards
> 
> Thorsten
> 
> 
> [1] 
> https://github.com/apache/maven-compiler-plugin/blob/master/src/it/multirelease-patterns/singleproject-runtime/pom.xml 
> 
> 
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> 

-- 
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Ceki Gülcü