Anand Beh created MCOMPILER-462: ----------------------------------- Summary: Modular Multi-Release JAR and Maven-Bundle-Plugin together cause inconsistent compilation behavior Key: MCOMPILER-462 URL: https://issues.apache.org/jira/browse/MCOMPILER-462 Project: Maven Compiler Plugin Issue Type: Bug Affects Versions: 3.8.1 Environment: Mac OS 10.14.6 Maven 3.8.1 Maven-Compiler-Plugin 3.8.1 Maven-Bundle-Plugin 5.1.2 Reporter: Anand Beh Attachments: ModularMRJAR.zip
Building a project with a module descriptor placed in a multi-release directory, and in conjunction with the maven-bundle-plugin, creates discrepancies between "clean package" and "package" after changes have been made to the source tree. This is best explained by reproducing the issue. *Reproducer* Attached to this issue. Also clonable from [https://github.com/A248/ModularMRJAR] *Steps to reproduce* # Download the attached reproducer # *First Run:* Run _mvn package_ # Add a new class, e.g. "Clazz2" in src/main/java/org/mrjar # *Second Run*: Run _mvn package_ # *Third Run*: Run _mvn clean package_ The Second Run can be repeated any number of times. It will consistently fail with the reason that the org.mrjar package is not found. *Results* * First Run - compilation success * Second Run - failure * Third Run - success The Third Run and the Second Run should compile identically. *Analysis* The difference between the second run and the third run is visible using the -X option. The trouble happens when compiling the MR classes - i.e., the compile-java11 execution defined in the reproducer's pom. On the second run, the non-MR classes are placed on the modulepath. The MR classes fail to compile: {code:java} [DEBUG] Classpath: [DEBUG] Modulepath: [DEBUG] /Users/anandbeh/git/ModularMRJAR/target/classes [DEBUG] Source roots: [DEBUG] /Users/anandbeh/git/ModularMRJAR/src/main/java11 [DEBUG] Command line options: [DEBUG] -d /Users/anandbeh/git/ModularMRJAR/target/classes/META-INF/versions/11 --module-path /Users/anandbeh/git/ModularMRJAR/target/classes: -sourcepath /Users/anandbeh/git/ModularMRJAR/src/main/java11:/Users/anandbeh/git/ModularMRJAR/target/generated-sources/annotations: -s /Users/anandbeh/git/ModularMRJAR/target/generated-sources/annotations -g -nowarn --release 11 -encoding UTF-8 --module-version 0.1.0-SNAPSHOT{code} On the third run, the non-MR classes are placed on the classpath. The MR classes compile. It is further notable that the compiler command line options differ: {code:java} [DEBUG] Classpath: [DEBUG] /Users/anandbeh/git/SolarMC/ModularMRJAR/target/classes [DEBUG] Source roots: [DEBUG] /Users/anandbeh/git/SolarMC/ModularMRJAR/src/main/java11 [DEBUG] Command line options: [DEBUG] -d /Users/anandbeh/git/SolarMC/ModularMRJAR/target/classes/META-INF/versions/11 -classpath /Users/anandbeh/git/SolarMC/ModularMRJAR/target/classes: -sourcepath /Users/anandbeh/git/SolarMC/ModularMRJAR/src/main/java11:/Users/anandbeh/git/SolarMC/ModularMRJAR/target/generated-sources/annotations: -s /Users/anandbeh/git/SolarMC/ModularMRJAR/target/generated-sources/annotations -g -nowarn --release 11 -encoding UTF-8 --patch-module org.mrjar=/Users/anandbeh/git/SolarMC/ModularMRJAR/target/classes --module-version 0.1.0-SNAPSHOT{code} *How to Resolve / Lesson from when not using the maven-bundle-plugin* If the maven-bundle-plugin were to _NOT_ be used, then: # The Second Run would succeed. # The non-MR classes are placed on the class-path consistently. This suggests the behavior of the Second Run in placing the non-MR classes on the module-path is incorrect. The Second Run should place the non-MR classes on the class-path just like the Third Run does. -- This message was sent by Atlassian Jira (v8.3.4#803005)