[wildfly-dev] jdk 9 reflection problem

Amos Feng zfeng at redhat.com
Thu Jan 5 09:01:57 EST 2017


Hi Mike, 

I had tried MAVEN_OPTS="--add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang.reflect=ALL-UNNAMED --add-opens java.base/java.text=ALL-UNNAMED --add-opens java.desktop/java.awt.font=ALL-UNNAMED" and it works.

Amos

----- Original Message -----
From: "Michael Musgrove" <mmusgrov at redhat.com>
To: "WildFly Dev" <wildfly-dev at lists.jboss.org>
Sent: Thursday, January 5, 2017 8:04:09 PM
Subject: [wildfly-dev] jdk 9 reflection problem

We have just upgraded our jdk build to 9-ea+149 which has tightened up the accessibility rules. The recommendation seems to be to use the --add-opens flag to override the rules. 

I tried export MAVEN_OPTS="--add-opens java.base/java.util=ALL-UNNAMED" which made no difference. Our jdk 9 FAQ does not provided any hints either. 

Can anyone provide advice on how to resolve the following maven build error: 


[WARNING] Error injecting: org.apache.maven.plugins.war.WarMojo 
com.google.inject.ProvisionException: Unable to provision, see the following errors: 

1) Error injecting constructor, java.lang.ExceptionInInitializerError 
at org.apache.maven.plugins.war.WarMojo.<init>(Unknown Source) 
while locating org.apache.maven.plugins.war.WarMojo 

... 

Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible: module java.base does not "opens java.util" to unnamed m 
odule @669f2128 
at java.base/jdk.internal.reflect.Reflection.throwInaccessibleObjectException(Reflection.java:427) 
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:201) 
at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:171) 
at java.base/java.lang.reflect.Field.setAccessible(Field.java:165) 
at com.thoughtworks.xstream.core.util.Fields.locate(Fields.java:40) 
at com.thoughtworks.xstream.converters.collections.TreeMapConverter.<clinit>(TreeMapConverter.java:50) 


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Michael Musgrove 
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