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https://issues.apache.org/jira/browse/MENFORCER-274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17199446#comment-17199446
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Konrad Windszus commented on MENFORCER-274:
-------------------------------------------
Just for the record: This issue can only be seen for Java version strings with
a length < 3, i.e. for {{9}} and {{11}}, but not for {{9.0.3}} or {{11.0.3}}
> Use of RequireJavaVersion with Java-9 breaking starting at b175
> ---------------------------------------------------------------
>
> Key: MENFORCER-274
> URL: https://issues.apache.org/jira/browse/MENFORCER-274
> Project: Maven Enforcer Plugin
> Issue Type: Bug
> Components: Standard Rules
> Affects Versions: 1.4.1
> Reporter: Peter Ansell
> Assignee: Guillaume Boué
> Priority: Major
> Fix For: 3.0.0-M1, 3.0.0-M2, 3.0.0-M3
>
>
> The Oracle JDK9 changed from showing a version string of "9-ea" to simply "9"
> in build 175.
> This caused the RequireJavaVersion rule that was previously working with
> "9-ea" to start breaking.
> The break may be due to its use of commons-lang:2, rather than
> commons-lang3:3.5+ where parsing should work for the newer style of Java
> versions, but not clear why it started to fail now.
> Stack trace is:
> {noformat}
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:183)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
> ... 20 more
> Caused by: org.apache.maven.plugin.PluginContainerException: An API
> incompatibility was encountered while executing
> org.apache.maven.plugins:maven-enforcer-plugin:1.4.1:enforce:
> java.lang.ExceptionInInitializerError: null
> -----------------------------------------------------
> realm = plugin>org.apache.maven.plugins:maven-enforcer-plugin:1.4.1
> strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
> urls[0] =
> file:/home/mint/.m2/repository/org/apache/maven/plugins/maven-enforcer-plugin/1.4.1/maven-enforcer-plugin-1.4.1.jar
> urls[1] =
> file:/home/mint/.m2/repository/org/codehaus/mojo/extra-enforcer-rules/1.0-beta-6/extra-enforcer-rules-1.0-beta-6.jar
> urls[2] =
> file:/home/mint/.m2/repository/org/apache/maven/shared/maven-dependency-tree/2.2/maven-dependency-tree-2.2.jar
> urls[3] =
> file:/home/mint/.m2/repository/org/codehaus/plexus/plexus-component-annotations/1.5.5/plexus-component-annotations-1.5.5.jar
> urls[4] =
> file:/home/mint/.m2/repository/org/eclipse/aether/aether-util/0.9.0.M2/aether-util-0.9.0.M2.jar
> urls[5] =
> file:/home/mint/.m2/repository/org/apache/maven/shared/maven-common-artifact-filters/1.4/maven-common-artifact-filters-1.4.jar
> urls[6] = file:/home/mint/.m2/repository/com/ibm/icu/icu4j/56.1/icu4j-56.1.jar
> urls[7] =
> file:/home/mint/.m2/repository/backport-util-concurrent/backport-util-concurrent/3.1/backport-util-concurrent-3.1.jar
> urls[8] =
> file:/home/mint/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.11/plexus-interpolation-1.11.jar
> urls[9] =
> file:/home/mint/.m2/repository/org/slf4j/slf4j-jdk14/1.5.6/slf4j-jdk14-1.5.6.jar
> urls[10] =
> file:/home/mint/.m2/repository/org/slf4j/jcl-over-slf4j/1.5.6/jcl-over-slf4j-1.5.6.jar
> urls[11] =
> file:/home/mint/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.2.1/maven-reporting-api-2.2.1.jar
> urls[12] =
> file:/home/mint/.m2/repository/org/apache/maven/doxia/doxia-sink-api/1.1/doxia-sink-api-1.1.jar
> urls[13] =
> file:/home/mint/.m2/repository/org/apache/maven/doxia/doxia-logging-api/1.1/doxia-logging-api-1.1.jar
> urls[14] =
> file:/home/mint/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar
> urls[15] =
> file:/home/mint/.m2/repository/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-4/plexus-interactivity-api-1.0-alpha-4.jar
> urls[16] =
> file:/home/mint/.m2/repository/org/sonatype/plexus/plexus-sec-dispatcher/1.3/plexus-sec-dispatcher-1.3.jar
> urls[17] =
> file:/home/mint/.m2/repository/org/sonatype/plexus/plexus-cipher/1.4/plexus-cipher-1.4.jar
> urls[18] =
> file:/home/mint/.m2/repository/org/codehaus/plexus/plexus-utils/3.0.22/plexus-utils-3.0.22.jar
> urls[19] =
> file:/home/mint/.m2/repository/commons-lang/commons-lang/2.3/commons-lang-2.3.jar
> urls[20] =
> file:/home/mint/.m2/repository/org/apache/maven/enforcer/enforcer-api/1.4.1/enforcer-api-1.4.1.jar
> urls[21] =
> file:/home/mint/.m2/repository/org/apache/maven/enforcer/enforcer-rules/1.4.1/enforcer-rules-1.4.1.jar
> urls[22] =
> file:/home/mint/.m2/repository/org/beanshell/bsh/2.0b4/bsh-2.0b4.jar
> urls[23] =
> file:/home/mint/.m2/repository/org/codehaus/plexus/plexus-i18n/1.0-beta-6/plexus-i18n-1.0-beta-6.jar
> urls[24] =
> file:/home/mint/.m2/repository/org/apache/maven/plugin-testing/maven-plugin-testing-harness/1.3/maven-plugin-testing-harness-1.3.jar
> urls[25] =
> file:/home/mint/.m2/repository/org/codehaus/plexus/plexus-archiver/2.2/plexus-archiver-2.2.jar
> urls[26] =
> file:/home/mint/.m2/repository/org/codehaus/plexus/plexus-io/2.0.4/plexus-io-2.0.4.jar
> urls[27] = file:/home/mint/.m2/repository/junit/junit/4.11/junit-4.11.jar
> urls[28] =
> file:/home/mint/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar
> Number of foreign imports: 1
> import: Entry[import from realm ClassRealm[maven.api, parent: null]]
> -----------------------------------------------------
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:181)
> ... 21 more
> Caused by: java.lang.ExceptionInInitializerError
> at
> org.apache.maven.plugins.enforcer.RequireJavaVersion.execute(RequireJavaVersion.java:52)
> at
> org.apache.maven.plugins.enforcer.EnforceMojo.execute(EnforceMojo.java:193)
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
> ... 21 more
> Caused by: java.lang.StringIndexOutOfBoundsException: begin 0, end 3, length 1
> at java.base/java.lang.String.checkBoundsBeginEnd(String.java:3116)
> at java.base/java.lang.String.substring(String.java:1885)
> at
> org.apache.commons.lang.SystemUtils.getJavaVersionAsFloat(SystemUtils.java:1122)
> at org.apache.commons.lang.SystemUtils.<clinit>(SystemUtils.java:818)
> ... 24 more
> {noformat}
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