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https://issues.apache.org/jira/browse/MSHADE-189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15435052#comment-15435052
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Michael Vorburger commented on MSHADE-189:
------------------------------------------
Hello, I've just found this issue through Web Search for a similar issue (FYI
https://bugs.opendaylight.org/show_bug.cgi?id=6523; unrelated to Maven) and
just FYI this seems to have something to do with ASM versions and how whatever
code you have which calls ASM, in your case above here org.vafer.jdependency -
"changing Opcodes.ASM4 to Opcodes.ASM5 does the trick" - see also e.g.
https://issues.gradle.org/browse/GRADLE-3157. Just sayin' this in case this in
the future helps with this issue (which is not affecting me; just a friendly
FYI).
> Null Pointer Exception when minimizeJar set to true (Maven 3.3.1)
> -----------------------------------------------------------------
>
> Key: MSHADE-189
> URL: https://issues.apache.org/jira/browse/MSHADE-189
> Project: Maven Shade Plugin
> Issue Type: Bug
> Affects Versions: 2.3
> Environment: Windows 7
> Reporter: Michael Ennen
> Fix For: waiting-for-feedback
>
>
> Maven version info:
> Apache Maven 3.3.1 (cab6659f9874fa96462afef40fcf6bc033d58c1c;
> 2015-03-13T13:10:27-07:00)
> Maven home: C:\apache-maven-3.3.1
> Java version: 1.8.0_40, vendor: Oracle Corporation
> Java home: C:\Program Files\Java\jdk1.8.0_40\jre
> Default locale: en_US, platform encoding: Cp1252
> OS name: "windows 7", version: "6.1", arch: "amd64", family: "dos"
> Ran maven with:
> install -e -X
> POM:
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-shade-plugin</artifactId>
> <version>2.3</version>
> <executions>
> <execution>
> <id>shade-core</id>
> <phase>package</phase>
> <goals>
> <goal>shade</goal>
> </goals>
> <configuration>
> <minimizeJar>true</minimizeJar>
>
> <dependencyReducedPomLocation>${project.build.directory}/dependency-reduced-pom.xml</dependencyReducedPomLocation>
> </configuration>
> </execution>
> </executions>
> </plugin>
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-shade-plugin:2.3:shade (shade-core) on project
> core: Error creating shaded jar: null: RuntimeException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal org.apache.maven.plugins:maven-shade-plugin:2.3:shade (shade-core) on
> project core: Error creating shaded jar: null
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
> at
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
> at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
> Caused by: org.apache.maven.plugin.MojoExecutionException: Error creating
> shaded jar: null
> at
> org.apache.maven.plugins.shade.mojo.ShadeMojo.execute(ShadeMojo.java:566)
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
> ... 26 more
> Caused by: java.lang.RuntimeException
> at org.objectweb.asm.MethodVisitor.visitParameter(Unknown Source)
> at org.objectweb.asm.MethodVisitor.visitParameter(Unknown Source)
> at org.objectweb.asm.ClassReader.b(Unknown Source)
> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> at org.objectweb.asm.ClassReader.accept(Unknown Source)
> at org.vafer.jdependency.Clazzpath.addClazzpathUnit(Clazzpath.java:194)
> at org.vafer.jdependency.Clazzpath.addClazzpathUnit(Clazzpath.java:130)
> at
> org.apache.maven.plugins.shade.filter.MinijarFilter.addDependencyToClasspath(MinijarFilter.java:101)
> at
> org.apache.maven.plugins.shade.filter.MinijarFilter.<init>(MinijarFilter.java:81)
> at
> org.apache.maven.plugins.shade.mojo.ShadeMojo.getFilters(ShadeMojo.java:805)
> at
> org.apache.maven.plugins.shade.mojo.ShadeMojo.execute(ShadeMojo.java:458)
> ... 28 more
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