Thorsten Heit created SLF4J-456: ----------------------------------- Summary: SLF4J 1.8 on JVMs < 9 Key: SLF4J-456 URL: https://jira.qos.ch/browse/SLF4J-456 Project: SLF4J Issue Type: Bug Components: Core API, jcl-over-slf4j Affects Versions: 1.8.0-beta2 Reporter: Thorsten Heit Assignee: SLF4J developers list 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: {noformat} (...) [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 (...){noformat} Switching back to the older 1.7.25 version lets this error message disappear. The reason is that Websphere (still) uses Java 8 which cannot parse / process the {{module-info.class}} that was compiled with Java 9. My WAR inside the EAR actually only uses {{slf4j-api-1.8.0-beta2.jar}} and {{jcl-over-slf4j-1.8.0-beta2.jar}}, but I assume that all Jars containing this file are affected. Solution: Move the class to {{META-INF/versions/9}} and mark the resulting jar as being a multi-release jar. See the example in [https://github.com/apache/maven-compiler-plugin/blob/master/src/it/multirele...] for how to do this -- This message was sent by Atlassian JIRA (v7.3.1#73012)