[wildfly-dev] jdk 9 reflection problem

[Tomaž Cerar]

Yeah we need to update FAQ with the latest changes around this.

it is not M2_OPTS that you need to set but in most cases surefire args as
you need this as part of test runtime not maven runtime.
but --add-opens is the flag you are properly using for this case.
It in most cases replaces need for --add-exports flags

I would also recommend adding -Dsun.reflect.debugModuleAccessChecks=true
flag that should help you with reflection issues.

What is your use case exactly? building a war?
Maybe link to project / pom.xml that has this issue?

--
tomaz

On Thu, Jan 5, 2017 at 1:04 PM, Michael Musgrove <mmusgrov at redhat.com>
wrote:

> 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)
>
>
> --
> Michael Musgrove
> Transactions Team
> e: mmusgrov at redhat.com
> t: +44 191 243 0870 <+44%20191%20243%200870>
>
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