Benjamin Marwell created MCOMPILER-445:
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Summary: Javac error on jdk16 build 18: invalid flag:
-Xdoclint:-missing
Key: MCOMPILER-445
URL: https://issues.apache.org/jira/browse/MCOMPILER-445
Project: Maven Compiler Plugin
Issue Type: Bug
Affects Versions: 3.8.1, 3.8.0
Environment: Maven 3.6.3
Compiler-Plugin 3.8.1
JDK16 since JDK 16 ea b 18
Reporter: Benjamin Marwell
Assignee: Benjamin Marwell
h2. Issue description
When compiling with options {{noFork}} and {{-Xdoclint}}, the compiler plugin
will fail:
{quote}{{[INFO]
------------------------------------------------------------------------}}
{{[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (pre-compile-jute)
on project zookeeper-jute: Fatal error compiling: error: invalid flag:
-Xdoclint:-missing -> [Help 1]}}
{{This is Maven debug:}}
{{[DEBUG] Classpath:}}
{{[DEBUG] /home/eolivelli/dev/zookeeper/zookeeper-jute/target/classes}}
{{[DEBUG]
/home/eolivelli/.m2/repository/org/apache/yetus/audience-annotations/0.5.0/audience-annotations-0.5.0.jar}}
{{[DEBUG] Source roots:}}
{{[DEBUG] /home/eolivelli/dev/zookeeper/zookeeper-jute/src/main/java}}
{{[DEBUG]
/home/eolivelli/dev/zookeeper/zookeeper-jute/target/generated-sources/java}}
{{[DEBUG]
/home/eolivelli/dev/zookeeper/zookeeper-jute/target/generated-sources/annotations}}
{{[DEBUG] Command line options:}}
{{[DEBUG] -d /home/eolivelli/dev/zookeeper/zookeeper-jute/target/classes
-classpath
/home/eolivelli/dev/zookeeper/zookeeper-jute/target/classes:/home/eolivelli/.m2/repository/org/apache/yetus/audience-annotations/0.5.0/audience-annotations-0.5.0.jar:
-sourcepath
/home/eolivelli/dev/zookeeper/zookeeper-jute/src/main/java:/home/eolivelli/dev/zookeeper/zookeeper-jute/target/generated-sources/java:/home/eolivelli/dev/zookeeper/zookeeper-jute/target/generated-sources/annotations:
-s
/home/eolivelli/dev/zookeeper/zookeeper-jute/target/generated-sources/annotations
-g --release 8 -encoding UTF-8 -Werror -Xlint:deprecation -Xlint:unchecked
-Xlint:-options -Xdoclint:-missing -Xpkginfo:always}}
{{[DEBUG] incrementalBuildHelper#beforeRebuildExecution}}
{{[INFO] Compiling 36 source files to
/home/eolivelli/dev/zookeeper/zookeeper-jute/target/classes}}{quote}
But -Xdoclint is a valid option.
h2. Cause
Without forking, maven runs {{javac}} using
{{com.sun.tools.javac.api.JavacTool}}. The module is not loaded.
h2. Proposed solution
>From the mailing list:
When running the compiler in noFork mode, use the ToolProvider to run Javac in
the same VM on Java9+. This can be implemented using multi-release-jars. See
the {{maven-jlink-plugin}} as a reference.
h2. Related
[Move Doclint to jdk.javadoc
module|https://bugs.openjdk.java.net/browse/JDK-8252712]
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