I cannot find a way to make this work, I hope you can help. I should be happy to be pointed to an existing answer
*The Problem* I have a very simple Java application demonstrating the problem I am having with using the latest Log4j2 V2.11.1 as a module (log4j.api) and building it in Netbeans. The example compiles, builds and runs when I use the classpath, but cannot compile the module-info.java file when I use the modulepath. I have uploaded the code and Netbeans files at the following link: https://github.com/cosmiczoo/Log4j2TestCase Log4j2 V2.11.1 is a Multi-release JAR (MR-JAR). The module-info.class file is in log4j-api-2.11.1.jar under the folder META-INF/versions/9, which seems correct. The Netbeans editor can see the module log4j.api because it appears in the drop-down menu of completion suggestions and does not have wiggly red line under it. My simple test program has a module-info.java file that requires log4j.api and nothing else. This bit works as I would expect. I have located an unanswered question on StackOverflow asking a similar question https://stackoverflow.com/questions/50568139/netbeans-java-9-modules-log4j-2-11-module-not-found *To Reproduce My Test * I *Clean* the project. It completes successfully. I then use a RMB option to *Compile File* the module-info.java file. This generates an error pointing to the line *requires log4j.api* in my module-info.java. <path-to>/Log4j2TestCase/src/module-info.java:7: error: module not found: log4j.api requires log4j.api; 1 error ZipFileIndex clearCache failed <path-to>/Log4j2TestCase/nbproject/build-impl.xml:1131: The following error occurred while executing this line: <path-to>/Log4j2TestCase/nbproject/build-impl.xml:358: Compile failed; see the compiler error output for details. at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1425) at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:1133) at org.netbeans.modules.java.source.ant.JavacTask.execute(JavacTask.java:120) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292) and so on. Please let me know if you want more. I have tried building this program under JDK-9, JDK-10 and JDK-11. My Netbeans runs on JDK-10. I am learning how to migrate to modules by trial, error and reading. I may have made an error, but if I have, I don't know where. Thanks in anticipation Emma
