Wildfly bootable jar does not run in docker container

  bootable, docker, jar, java, wildfly

I am testing wildfly bootable jar. Made a simple project and started it with "java -jar myapp-bootable.jar" just fine. It contains basically just a index.html. Simple enough.

Next step, was do build a docker image around it. And this didn’t work.

Here is the dockerfile

FROM maven:3.6.3-adoptopenjdk-15 as build
COPY src /usr/src/app/src
COPY pom.xml /usr/src/app
RUN mvn -f /usr/src/app/pom.xml clean package

FROM adoptopenjdk:latest
COPY --from=build /usr/src/app/target/myapp-bootable.jar /opt/myapp-bootable.jar
WORKDIR /opt
CMD ["java", "-jar","myapp-bootable.jar"]

I use the same jdk on my mac and it does work. I really do not understand why I get this error message:

Exception in thread "main" java.lang.Exception: org.jboss.modules.ModuleLoadException: Error loading module from /tmp/wildfly-bootable-server4167855925626750470/modules/system/layers/base/org/apache/xerces/main/module.xml
    at org.wildfly.core.jar.boot.Main.runBootableJar(Main.java:162)
    at org.wildfly.core.jar.boot.Main.main(Main.java:141)
Caused by: org.jboss.modules.ModuleLoadException: Error loading module from /tmp/wildfly-bootable-server4167855925626750470/modules/system/layers/base/org/apache/xerces/main/module.xml
    at org.jboss.modules.xml.ModuleXmlParser.parseModuleXml(ModuleXmlParser.java:337)
    at org.jboss.modules.xml.ModuleXmlParser.parseModuleXml(ModuleXmlParser.java:293)
    at org.jboss.modules.xml.ModuleXmlParser.parseModuleXml(ModuleXmlParser.java:254)
    at org.jboss.modules.LocalModuleFinder.parseModuleXmlFile(LocalModuleFinder.java:250)
    at org.jboss.modules.LocalModuleFinder.lambda$findModule$1(LocalModuleFinder.java:195)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:691)
    at org.jboss.modules.LocalModuleFinder.findModule(LocalModuleFinder.java:195)
    at org.jboss.modules.ModuleLoader.findModule0(ModuleLoader.java:696)
    at org.jboss.modules.ModuleLoader.findModule(ModuleLoader.java:689)
    at org.jboss.modules.ModuleLoader.loadModuleLocal(ModuleLoader.java:499)
    at org.jboss.modules.DelegatingModuleLoader.preloadModule(DelegatingModuleLoader.java:57)
    at org.jboss.modules.Module.addPaths(Module.java:1252)
    at org.jboss.modules.Module.link(Module.java:1622)
    at org.jboss.modules.Module.relinkIfNecessary(Module.java:1650)
    at org.jboss.modules.ModuleLoader.loadModule(ModuleLoader.java:299)
    at org.wildfly.core.jar.boot.Main.runBootableJar(Main.java:160)
    ... 1 more
Caused by: org.jboss.modules.xml.XmlPullParserException: Failed to resolve artifact 'xerces:xercesImpl:2.12.0.SP03' (position: END_TAG seen ...esources>n        <artifact name="xerces:xercesImpl:2.12.0.SP03"/>... @26:57) 
    at org.jboss.modules.xml.ModuleXmlParser.parseArtifact(ModuleXmlParser.java:1050)
    at org.jboss.modules.xml.ModuleXmlParser.parseResources(ModuleXmlParser.java:937)
    at org.jboss.modules.xml.ModuleXmlParser.parseModuleContents(ModuleXmlParser.java:697)
    at org.jboss.modules.xml.ModuleXmlParser.parseDocument(ModuleXmlParser.java:469)
    at org.jboss.modules.xml.ModuleXmlParser.parseModuleXml(ModuleXmlParser.java:335)
    ... 16 more

Everything should be in the jar. If something was missing "myapp-bootable.jar" should not work, but it does. I even went inside the container and typed the command myself – no luck. Maybe the classloader?

Source: Docker Questions

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