Details
-
Bug
-
Resolution: Fixed
-
Major
-
1.8.0-beta2
-
None
-
major
Description
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 (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/multirelease-patterns/singleproject-runtime/pom.xml for how to do this