[MJAVADOC-517] NPE under Java 10 RC

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.1
• Assignee: Robert Scholte
• Reporter: Ian Young
• Created: 07/Mar/18 17:12
• Updated: 31/Oct/18 15:49
• Resolved: 10/Mar/18 14:14

Description

Under Java 10 RC, the plugin generates the following exception:

Caused by: java.lang.NullPointerException
    at org.apache.commons.lang3.SystemUtils.isJavaVersionAtLeast (SystemUtils.java:1626)
    at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.getJavadocExecutable (AbstractJavadocMojo.java:3683)
    at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.executeReport (AbstractJavadocMojo.java:2001)
    at org.apache.maven.plugins.javadoc.JavadocJar.doExecute (JavadocJar.java:190)

This seems to be down to the version string:

java version "10" 2018-03-20
Java(TM) SE Runtime Environment 18.3 (build 10+43)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10+43, mixed mode)

commons-lang3 version 3.5 can't deal with this, see https://issues.apache.org/jira/browse/LANG-1365 

Inserting an explicit dependency on commons-lang3 version 3.7 for the plugin works round the issue, and changing the dependency seems like the right fix for the next release of this plugin.

Issue Links

• depends upon: LANG-1365 Fix NullPointerException in isJavaVersionAtLeast on Java 10, add SystemUtils.IS_JAVA_10, add JavaVersion.JAVA_10
• is duplicated by: MJAVADOC-518 Old commons-lang3 dependency causes NPE with JDK 10
• is duplicated by: MJAVADOC-522 Javadoc generation broken on JDK 10 (Commons Lang3 gives NullPointerException)
• is duplicated by: MJAVADOC-524 Running javadoc plugin under JDK 10 fails with NPE
• is related to: MSITE-822 JDK 10: Null Pointer Exception