FULL PRODUCT VERSION :
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) Server VM (build 9+181, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux smmlaptop 4.2.0-42-generic #49~14.04.1-Ubuntu SMP Wed Jun 29 20:22:11 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
I created a simple application (attached) that uses Reflection to call setDesktopProperty(String, Object) on java.awt.Toolkit. This idea was taken from a workaround in our application.

I realize that the ability to implement workarounds in this manner is on life support now (Java 10?), but for maintaining backwards compatibility with legacy applications and to give us maintainers of older applications more time to migrate our code, Java 9 runs with –permit-illegal-access by default. However Java Web Start does not, as my test case demonstrates. This seems like an oversight by Oracle.

If you run my test case from the command line, it passes and works correctly with the expected warning:

Hello World
GLib-GIO-Message: Using the 'memory' GSettings backend. Your settings will not be saved or shared with other applications.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by Java9BreaksWhenTest (file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar) to method java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object)
WARNING: Please consider reporting this to the maintainers of Java9BreaksWhenTest
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
desktop Properties changed.

However, if I run it from Java Web Start, it fails every time with:

Java Web Start 12.0.0.0
Using JRE version 9+181 Java HotSpot(TM) Server VM
JRE expiration date: 2/3/18, 12:00 AM
User home directory = /home/smm
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
0-5: set trace level to <n>
----------------------------------------------------
basic: Java part started
basic: jnlpx.jvm: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
basic: jnlpx.remove: false
basic: jnlpx.heapsize: null
network: Loading user-defined proxy configuration ...
network: Done.
network: Loading proxy configuration from Netscape Navigator ...
network: Done.
network: net.proxy.loading.system
network: Done.
network: Proxy Configuration: System Proxy Configuration
basic: Using UTF-8 to encode arguments.
basic: Running JVMParams: [JVMParameters: isSecure: true, args:]
-> [JVMParameters: isSecure: true, args:]
basic: XMLParser with _source:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="file:///home/smm/hcs/testcode" href="java9BreaksWhenTest.jnlp">
    <information>
        <title>Java 9 Breaks When Test</title>
        <vendor>HCS</vendor>
        <homepage href="http://hcs.us.com"/>
        <description>Java 9 Breaks When Test</description>
        <description kind="short">Java 9 Breaks When Test</description>
      </information>
    <security><all-permissions/></security>
    <update check="timeout" policy="always"/>
    <resources>
        <j2se version="1.5+" java-vm-args="-Xmx128m" />
        <jar href="Java9BreaksWhenTest.jar" main="true" download="eager"/>
    </resources>
    <application-desc main-class="Java9BreaksWhenTest">
    </application-desc>
</jnlp>
temp: returning LaunchDesc from XMLFormat.parse():

<jnlp spec="1.0+" codebase="file:/home/smm/hcs/testcode/" href="file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp">
  <information>
    <title>Java 9 Breaks When Test</title>
    <vendor>HCS</vendor>
    <homepage href="http://hcs.us.com"/>
    <description>Java 9 Breaks When Test</description>
    <description kind="short">Java 9 Breaks When Test</description>
  </information>
  <security>
    <all-permissions/>
  </security>
  <update check="timeout" policy="always"/>
  <resources>
    <java java-vm-args="-Xmx128m" version="1.5+"/>
    <jar href="file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar" download="eager" main="true"/>
  </resources>
  <application-desc type="Java" main-class="Java9BreaksWhenTest"/>
</jnlp>
network: prepareToLaunch: offlineOnly=false
cache: In-place upgrading old version 605 file: /home/smm/.java/deployment/cache/6.0/14/2431de0e-42249a33.idx
cache: Trying to update in place /home/smm/.java/deployment/cache/6.0/14/2431de0e-42249a33.idx
cache: Upgrade writing to disk for /home/smm/.java/deployment/cache/6.0/14/2431de0e-42249a33
cache: Upgrade of entry done
network: Cache entry found [url: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp, version: null]
cache: Adding MemoryCache entry: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 1
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 2
cache: Resource file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp has expired.
network: ResponseCode for file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp : 200
network: Encoding for file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp : null
CacheEntry[file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp]: updateAvailable=true,lastModified=Sat Feb 23 12:27:12 CST 3125641,length=50069504
cache: Resource file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp has expired.
network: ResponseCode for file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp : 200
network: Encoding for file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp : null
network: Server response: (length: 764, lastModified: Wed Aug 30 12:07:42 CDT 2017, downloadVersion: null, mimeType: application/x-java-jnlp-file)
network: Downloading resource: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
Content-Length: 764
Content-Encoding: null
network: Wrote URL file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp to File /home/smm/.java/deployment/cache/6.0/14/2431de0e-7f7e061e-temp
network: Cache: Enable a new CacheEntry: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
network: Remove cache entry: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: MemoryCache: removed entry file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
network: Downloaded file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp: /home/smm/.java/deployment/cache/6.0/14/2431de0e-7f7e061e
cache: Adding MemoryCache entry: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 1
basic: XMLParser with _source:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="file:///home/smm/hcs/testcode" href="java9BreaksWhenTest.jnlp">
    <information>
        <title>Java 9 Breaks When Test</title>
        <vendor>HCS</vendor>
        <homepage href="http://hcs.us.com"/>
        <description>Java 9 Breaks When Test</description>
        <description kind="short">Java 9 Breaks When Test</description>
      </information>
    <security><all-permissions/></security>
    <update check="timeout" policy="always"/>
    <resources>
        <j2se version="1.5+" java-vm-args="-Xmx128m" />
        <jar href="Java9BreaksWhenTest.jar" main="true" download="eager"/>
    </resources>
    <application-desc main-class="Java9BreaksWhenTest">
    </application-desc>
</jnlp>
temp: returning LaunchDesc from XMLFormat.parse():

<jnlp spec="1.0+" codebase="file:/home/smm/hcs/testcode/" href="file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp">
  <information>
    <title>Java 9 Breaks When Test</title>
    <vendor>HCS</vendor>
    <homepage href="http://hcs.us.com"/>
    <description>Java 9 Breaks When Test</description>
    <description kind="short">Java 9 Breaks When Test</description>
  </information>
  <security>
    <all-permissions/>
  </security>
  <update check="timeout" policy="always"/>
  <resources>
    <java java-vm-args="-Xmx128m" version="1.5+"/>
    <jar href="file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar" download="eager" main="true"/>
  </resources>
  <application-desc type="Java" main-class="Java9BreaksWhenTest"/>
</jnlp>
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 2
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 3
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 4
network: isUpdated: true
basic: not using applet lifecycle
basic: not using applet lifecycle
basic: Launcher: isInstaller: false, isRelaunch: false, isImport(): false, java.home:/usr/lib/jvm/jdk1.9.0_181_ea, Running JRE: JREInfo for index 2:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: true
    system is: false

basic: JREInfos
basic:
JREInfo: 4 entries
basic: JREInfo 0:
basic: JREInfo (not in list):
    platform is: 1.8
    product is: 1.8.0_51
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.8.0_51/jre/bin/java
    args is:
    native platform is: Linux, amd64 [ x86_64, 64bit ]
    JavaFX runtime is: JavaFX 1.8.0_51 at: /usr/lib/jvm/jdk1.8.0_51/jre/lib/ext/
    enabled is: true
    registered is: true
    system is: false

basic: JREInfo 1:
basic: JREInfo (not in list):
    platform is: 1.8
    product is: 1.8.0_65
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.8.0_65/jre/bin/java
    args is:
    native platform is: Linux, amd64 [ x86_64, 64bit ]
    JavaFX runtime is: JavaFX 1.8.0_65 at: /usr/lib/jvm/jdk1.8.0_65/jre/lib/ext/
    enabled is: true
    registered is: true
    system is: false

basic: JREInfo 2:
basic: JREInfo for index 2:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: true
    system is: false

basic: JREInfo 3:
basic: JREInfo for index 3:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: false
    system is: true

security: --- parseCommandLine converted : -Xmx128m
into:
[-Xmx128m]
security: --- parseCommandLine converted : -Xmx128m
into:
[-Xmx128m]
basic: LaunchDesc.selectJRE( returning selected jre: JREInfo for index 2:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: true
    system is: false

basic: LaunchDesc location: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 3
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 2
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 1
cache: delayedRemoveResource: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
security: Security check for progress jars: allSigned=true
basic: Offline mode: false
IsInCache: false
forceUpdate: true
needUpdate: true
IsInstaller: false
network: Total size to download: -1
cache: In-place upgrading old version 605 file: /home/smm/.java/deployment/cache/6.0/40/23626f68-4de57dda.idx
cache: Trying to update in place /home/smm/.java/deployment/cache/6.0/40/23626f68-4de57dda.idx
cache: Upgrade writing to disk for /home/smm/.java/deployment/cache/6.0/40/23626f68-4de57dda
security: Blacklist revocation check is enabled
security: blacklist: created: NEED_LOAD, lastModified: 1504113931000
security: blacklist: check contains Pq5IzpMK/o5sYLk4oXd4DFmL1ZI52v4l9VccdEMNnpg=, state now NEED_LOAD
security: blacklist: loadCache
security: blacklist: not found in cache
security: Trusted libraries list check is enabled
security: Trusted libraries list file not found
cache: Create from verifier: JarSigningData{hasOnlySignedEntries=true, hasSingleCodeSource=true, hasMissingSignedEntries=false}
cache: Upgrade of entry done
network: Cache entry found [url: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar, version: null]
cache: Adding MemoryCache entry: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: Resource file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar has expired.
network: ResponseCode for file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar : 200
network: Encoding for file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar : null
CacheEntry[file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar]: updateAvailable=true,lastModified=Sat Dec 20 17:45:04 CST 3125642,length=182321152
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 1
cache: Resource file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar has expired.
network: ResponseCode for file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar : 200
network: Encoding for file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar : null
network: Server response: (length: 2782, lastModified: Wed Aug 30 12:22:19 CDT 2017, downloadVersion: null, mimeType: application/x-java-archive)
network: Downloading resource: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
Content-Length: 2,782
Content-Encoding: null
network: Wrote URL file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar to File /home/smm/.java/deployment/cache/6.0/40/23626f68-3c969016-temp
security: blacklist: check contains Pq5IzpMK/o5sYLk4oXd4DFmL1ZI52v4l9VccdEMNnpg=, state now IN_MEMORY
security: blacklist: not found in cache
security: Trusted libraries list file not found
cache: Create from verifier: JarSigningData{hasOnlySignedEntries=true, hasSingleCodeSource=true, hasMissingSignedEntries=false}
network: Cache: Enable a new CacheEntry: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
network: Remove cache entry: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: MemoryCache: removed entry file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
network: Downloaded file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar: /home/smm/.java/deployment/cache/6.0/40/23626f68-3c969016
cache: Adding MemoryCache entry: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 1
network: Download Progress: jarsDone: 1
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 2
cache: Cancel delay cleanup: URL: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp | /home/smm/.java/deployment/cache/6.0/14/2431de0e-7f7e061e.idx
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 3
security: Validating cached jar url=file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar ffile=/home/smm/.java/deployment/cache/6.0/40/23626f68-3c969016 com.sun.deploy.cache.CachedJarFile@12a5b58
security: Missing Application-Library-Allowable-Codebase manifest attribute for: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
security: Istrusted: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp false
security: Accessing keys and certificate in Mozilla user profile: null
security: Missing Application-Library-Allowable-Codebase manifest attribute for: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
security: Loading Deployment certificates from /home/smm/.java/deployment/security/trusted.certs
security: Loaded Deployment certificates from /home/smm/.java/deployment/security/trusted.certs
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Validate the certificate chain using CertPath API
security: The certificate has expired, need to check timestamping info
security: No timestamping info available
security: Loading Root CA certificates from /usr/lib/jvm/jdk1.9.0_181_ea/lib/security/cacerts
security: Loaded Root CA certificates from /usr/lib/jvm/jdk1.9.0_181_ea/lib/security/cacerts
security: Obtain certificate collection in Root CA certificate store
security: Obtain certificate collection in Root CA certificate store
security: Obtain certificate collection in Root CA certificate store
security: Obtain certificate collection in Root CA certificate store
security: Loaded blacklisted.certs file: /home/smm/.java/deployment/security/blacklisted.certs
security: SHA-256Certificate finger print: 1037DBFCD0E7C3F9230A7FFBBEA9F745437A3C1AB4C83976D3D90D3AD3B75699
security: SHA-256Certificate finger print: 1037DBFCD0E7C3F9230A7FFBBEA9F745437A3C1AB4C83976D3D90D3AD3B75699
security: The OCSP support is enabled
security: The CRL support is enabled
security: Saving certificates in Deployment session certificate store
security: Saved certificates in Deployment session certificate store
security: Verifying permission attribute in main jar: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 4
security: SHA-256Certificate finger print: 1037DBFCD0E7C3F9230A7FFBBEA9F745437A3C1AB4C83976D3D90D3AD3B75699
security: Mark trusted: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
basic: passing security checks; secureArgs:true, allSigned:false
basic: trusted app: true, -secure=false
basic: JREMatcher:
  JREDesc: JREDesc[version 1.5+, versionType=1, secure=false, heap=-1--1, args=-Xmx128m, href=null, null, null]
  JREInfo: JREInfo for index 2:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: true
    system is: false

  Init Heap: -1
  Max Heap: 134217728
  Satisfying: true, true
  SatisfyingVersion: true
  SatisfyingJVMArgs: true, true
  SatisfyingSecure: true
  Selected JVMParam: [JVMParameters: isSecure: true, args:]
  Running JVMParam: [JVMParameters: isSecure: true, args:]
basic: continuing launch in this VM
security: JUT Record:
    javaws application
    file:/home/smm/hcs/testcode/: sourceURL=file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp app_model=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
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 2
basic: not using applet lifecycle
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 5
basic: Main-class: Java9BreaksWhenTest
security: JAVAWS AppPolicy Permission requested for: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
security: Missing Application-Library-Allowable-Codebase manifest attribute for: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
security: Istrusted: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp true
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 6
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 7
Hello World
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at jdk.javaws@9/com.sun.javaws.Launcher.executeApplication(Launcher.java:1741)
at jdk.javaws@9/com.sun.javaws.Launcher.executeMainClass(Launcher.java:1677)
at jdk.javaws@9/com.sun.javaws.Launcher.doLaunchApp(Launcher.java:1525)
at jdk.javaws@9/com.sun.javaws.Launcher.run(Launcher.java:158)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final void java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object) accessible: module java.desktop does not "opens java.awt" to unnamed module @14ad6b8
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:337)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:281)
at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:198)
at java.base/java.lang.reflect.Method.setAccessible(Method.java:192)
at Java9BreaksWhenTest.main(Java9BreaksWhenTest.java:26)
... 9 more
#### Java Web Start Error:
#### Unable to make protected final void java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object) accessible: module java.desktop does not "opens java.awt" to unnamed module @14ad6b8
java.lang.reflect.InaccessibleObjectException: Unable to make protected final void java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object) accessible: module java.desktop does not "opens java.awt" to unnamed module @14ad6b8
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:337)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:281)
at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:198)
at java.base/java.lang.reflect.Method.setAccessible(Method.java:192)
at Java9BreaksWhenTest.main(Java9BreaksWhenTest.java:26)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at jdk.javaws@9/com.sun.javaws.Launcher.executeApplication(Launcher.java:1741)
at jdk.javaws@9/com.sun.javaws.Launcher.executeMainClass(Launcher.java:1677)
at jdk.javaws@9/com.sun.javaws.Launcher.doLaunchApp(Launcher.java:1525)
at jdk.javaws@9/com.sun.javaws.Launcher.run(Launcher.java:158)
at java.base/java.lang.Thread.run(Thread.java:844)
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 6
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 5
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 4
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 3
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 2
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 1
cache: delayedRemoveResource: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 1
cache: delayedRemoveResource: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: MemoryCache: removed entry file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: MemoryCache: removed entry file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
I've attached the source code, MANIFEST file and JNLP file.

1) Build the source code into a class file.
2) Build a jar file with that class file and the MANIFEST file.
3) Sign the jar file with a trusted certificate.
4) Run the jar file with Java. It passes.
5) Run the jar file with JavaWS and the JNLP file (adjusting paths as needed) and it fails.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Hello World
GLib-GIO-Message: Using the 'memory' GSettings backend. Your settings will not be saved or shared with other applications.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by Java9BreaksWhenTest (file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar) to method java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object)
WARNING: Please consider reporting this to the maintainers of Java9BreaksWhenTest
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
desktop Properties changed.
ACTUAL -
Java Web Start 12.0.0.0
Using JRE version 9+181 Java HotSpot(TM) Server VM
JRE expiration date: 2/3/18, 12:00 AM
User home directory = /home/smm
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
0-5: set trace level to <n>
----------------------------------------------------
basic: Java part started
basic: jnlpx.jvm: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
basic: jnlpx.remove: false
basic: jnlpx.heapsize: null
network: Loading user-defined proxy configuration ...
network: Done.
network: Loading proxy configuration from Netscape Navigator ...
network: Done.
network: net.proxy.loading.system
network: Done.
network: Proxy Configuration: System Proxy Configuration
basic: Using UTF-8 to encode arguments.
basic: Running JVMParams: [JVMParameters: isSecure: true, args:]
-> [JVMParameters: isSecure: true, args:]
basic: XMLParser with _source:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="file:///home/smm/hcs/testcode" href="java9BreaksWhenTest.jnlp">
    <information>
        <title>Java 9 Breaks When Test</title>
        <vendor>HCS</vendor>
        <homepage href="http://hcs.us.com"/>
        <description>Java 9 Breaks When Test</description>
        <description kind="short">Java 9 Breaks When Test</description>
      </information>
    <security><all-permissions/></security>
    <update check="timeout" policy="always"/>
    <resources>
        <j2se version="1.5+" java-vm-args="-Xmx128m" />
        <jar href="Java9BreaksWhenTest.jar" main="true" download="eager"/>
    </resources>
    <application-desc main-class="Java9BreaksWhenTest">
    </application-desc>
</jnlp>
temp: returning LaunchDesc from XMLFormat.parse():

<jnlp spec="1.0+" codebase="file:/home/smm/hcs/testcode/" href="file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp">
  <information>
    <title>Java 9 Breaks When Test</title>
    <vendor>HCS</vendor>
    <homepage href="http://hcs.us.com"/>
    <description>Java 9 Breaks When Test</description>
    <description kind="short">Java 9 Breaks When Test</description>
  </information>
  <security>
    <all-permissions/>
  </security>
  <update check="timeout" policy="always"/>
  <resources>
    <java java-vm-args="-Xmx128m" version="1.5+"/>
    <jar href="file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar" download="eager" main="true"/>
  </resources>
  <application-desc type="Java" main-class="Java9BreaksWhenTest"/>
</jnlp>
network: prepareToLaunch: offlineOnly=false
cache: In-place upgrading old version 605 file: /home/smm/.java/deployment/cache/6.0/14/2431de0e-42249a33.idx
cache: Trying to update in place /home/smm/.java/deployment/cache/6.0/14/2431de0e-42249a33.idx
cache: Upgrade writing to disk for /home/smm/.java/deployment/cache/6.0/14/2431de0e-42249a33
cache: Upgrade of entry done
network: Cache entry found [url: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp, version: null]
cache: Adding MemoryCache entry: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 1
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 2
cache: Resource file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp has expired.
network: ResponseCode for file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp : 200
network: Encoding for file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp : null
CacheEntry[file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp]: updateAvailable=true,lastModified=Sat Feb 23 12:27:12 CST 3125641,length=50069504
cache: Resource file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp has expired.
network: ResponseCode for file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp : 200
network: Encoding for file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp : null
network: Server response: (length: 764, lastModified: Wed Aug 30 12:07:42 CDT 2017, downloadVersion: null, mimeType: application/x-java-jnlp-file)
network: Downloading resource: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
Content-Length: 764
Content-Encoding: null
network: Wrote URL file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp to File /home/smm/.java/deployment/cache/6.0/14/2431de0e-7f7e061e-temp
network: Cache: Enable a new CacheEntry: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
network: Remove cache entry: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: MemoryCache: removed entry file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
network: Downloaded file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp: /home/smm/.java/deployment/cache/6.0/14/2431de0e-7f7e061e
cache: Adding MemoryCache entry: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 1
basic: XMLParser with _source:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="file:///home/smm/hcs/testcode" href="java9BreaksWhenTest.jnlp">
    <information>
        <title>Java 9 Breaks When Test</title>
        <vendor>HCS</vendor>
        <homepage href="http://hcs.us.com"/>
        <description>Java 9 Breaks When Test</description>
        <description kind="short">Java 9 Breaks When Test</description>
      </information>
    <security><all-permissions/></security>
    <update check="timeout" policy="always"/>
    <resources>
        <j2se version="1.5+" java-vm-args="-Xmx128m" />
        <jar href="Java9BreaksWhenTest.jar" main="true" download="eager"/>
    </resources>
    <application-desc main-class="Java9BreaksWhenTest">
    </application-desc>
</jnlp>
temp: returning LaunchDesc from XMLFormat.parse():

<jnlp spec="1.0+" codebase="file:/home/smm/hcs/testcode/" href="file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp">
  <information>
    <title>Java 9 Breaks When Test</title>
    <vendor>HCS</vendor>
    <homepage href="http://hcs.us.com"/>
    <description>Java 9 Breaks When Test</description>
    <description kind="short">Java 9 Breaks When Test</description>
  </information>
  <security>
    <all-permissions/>
  </security>
  <update check="timeout" policy="always"/>
  <resources>
    <java java-vm-args="-Xmx128m" version="1.5+"/>
    <jar href="file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar" download="eager" main="true"/>
  </resources>
  <application-desc type="Java" main-class="Java9BreaksWhenTest"/>
</jnlp>
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 2
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 3
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 4
network: isUpdated: true
basic: not using applet lifecycle
basic: not using applet lifecycle
basic: Launcher: isInstaller: false, isRelaunch: false, isImport(): false, java.home:/usr/lib/jvm/jdk1.9.0_181_ea, Running JRE: JREInfo for index 2:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: true
    system is: false

basic: JREInfos
basic:
JREInfo: 4 entries
basic: JREInfo 0:
basic: JREInfo (not in list):
    platform is: 1.8
    product is: 1.8.0_51
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.8.0_51/jre/bin/java
    args is:
    native platform is: Linux, amd64 [ x86_64, 64bit ]
    JavaFX runtime is: JavaFX 1.8.0_51 at: /usr/lib/jvm/jdk1.8.0_51/jre/lib/ext/
    enabled is: true
    registered is: true
    system is: false

basic: JREInfo 1:
basic: JREInfo (not in list):
    platform is: 1.8
    product is: 1.8.0_65
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.8.0_65/jre/bin/java
    args is:
    native platform is: Linux, amd64 [ x86_64, 64bit ]
    JavaFX runtime is: JavaFX 1.8.0_65 at: /usr/lib/jvm/jdk1.8.0_65/jre/lib/ext/
    enabled is: true
    registered is: true
    system is: false

basic: JREInfo 2:
basic: JREInfo for index 2:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: true
    system is: false

basic: JREInfo 3:
basic: JREInfo for index 3:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: false
    system is: true

security: --- parseCommandLine converted : -Xmx128m
into:
[-Xmx128m]
security: --- parseCommandLine converted : -Xmx128m
into:
[-Xmx128m]
basic: LaunchDesc.selectJRE( returning selected jre: JREInfo for index 2:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: true
    system is: false

basic: LaunchDesc location: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 3
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 2
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 1
cache: delayedRemoveResource: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
security: Security check for progress jars: allSigned=true
basic: Offline mode: false
IsInCache: false
forceUpdate: true
needUpdate: true
IsInstaller: false
network: Total size to download: -1
cache: In-place upgrading old version 605 file: /home/smm/.java/deployment/cache/6.0/40/23626f68-4de57dda.idx
cache: Trying to update in place /home/smm/.java/deployment/cache/6.0/40/23626f68-4de57dda.idx
cache: Upgrade writing to disk for /home/smm/.java/deployment/cache/6.0/40/23626f68-4de57dda
security: Blacklist revocation check is enabled
security: blacklist: created: NEED_LOAD, lastModified: 1504113931000
security: blacklist: check contains Pq5IzpMK/o5sYLk4oXd4DFmL1ZI52v4l9VccdEMNnpg=, state now NEED_LOAD
security: blacklist: loadCache
security: blacklist: not found in cache
security: Trusted libraries list check is enabled
security: Trusted libraries list file not found
cache: Create from verifier: JarSigningData{hasOnlySignedEntries=true, hasSingleCodeSource=true, hasMissingSignedEntries=false}
cache: Upgrade of entry done
network: Cache entry found [url: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar, version: null]
cache: Adding MemoryCache entry: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: Resource file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar has expired.
network: ResponseCode for file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar : 200
network: Encoding for file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar : null
CacheEntry[file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar]: updateAvailable=true,lastModified=Sat Dec 20 17:45:04 CST 3125642,length=182321152
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 1
cache: Resource file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar has expired.
network: ResponseCode for file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar : 200
network: Encoding for file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar : null
network: Server response: (length: 2782, lastModified: Wed Aug 30 12:22:19 CDT 2017, downloadVersion: null, mimeType: application/x-java-archive)
network: Downloading resource: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
Content-Length: 2,782
Content-Encoding: null
network: Wrote URL file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar to File /home/smm/.java/deployment/cache/6.0/40/23626f68-3c969016-temp
security: blacklist: check contains Pq5IzpMK/o5sYLk4oXd4DFmL1ZI52v4l9VccdEMNnpg=, state now IN_MEMORY
security: blacklist: not found in cache
security: Trusted libraries list file not found
cache: Create from verifier: JarSigningData{hasOnlySignedEntries=true, hasSingleCodeSource=true, hasMissingSignedEntries=false}
network: Cache: Enable a new CacheEntry: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
network: Remove cache entry: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: MemoryCache: removed entry file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
network: Downloaded file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar: /home/smm/.java/deployment/cache/6.0/40/23626f68-3c969016
cache: Adding MemoryCache entry: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 1
network: Download Progress: jarsDone: 1
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 2
cache: Cancel delay cleanup: URL: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp | /home/smm/.java/deployment/cache/6.0/14/2431de0e-7f7e061e.idx
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 3
security: Validating cached jar url=file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar ffile=/home/smm/.java/deployment/cache/6.0/40/23626f68-3c969016 com.sun.deploy.cache.CachedJarFile@12a5b58
security: Missing Application-Library-Allowable-Codebase manifest attribute for: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
security: Istrusted: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp false
security: Accessing keys and certificate in Mozilla user profile: null
security: Missing Application-Library-Allowable-Codebase manifest attribute for: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
security: Loading Deployment certificates from /home/smm/.java/deployment/security/trusted.certs
security: Loaded Deployment certificates from /home/smm/.java/deployment/security/trusted.certs
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Validate the certificate chain using CertPath API
security: The certificate has expired, need to check timestamping info
security: No timestamping info available
security: Loading Root CA certificates from /usr/lib/jvm/jdk1.9.0_181_ea/lib/security/cacerts
security: Loaded Root CA certificates from /usr/lib/jvm/jdk1.9.0_181_ea/lib/security/cacerts
security: Obtain certificate collection in Root CA certificate store
security: Obtain certificate collection in Root CA certificate store
security: Obtain certificate collection in Root CA certificate store
security: Obtain certificate collection in Root CA certificate store
security: Loaded blacklisted.certs file: /home/smm/.java/deployment/security/blacklisted.certs
security: SHA-256Certificate finger print: 1037DBFCD0E7C3F9230A7FFBBEA9F745437A3C1AB4C83976D3D90D3AD3B75699
security: SHA-256Certificate finger print: 1037DBFCD0E7C3F9230A7FFBBEA9F745437A3C1AB4C83976D3D90D3AD3B75699
security: The OCSP support is enabled
security: The CRL support is enabled
security: Saving certificates in Deployment session certificate store
security: Saved certificates in Deployment session certificate store
security: Verifying permission attribute in main jar: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 4
security: SHA-256Certificate finger print: 1037DBFCD0E7C3F9230A7FFBBEA9F745437A3C1AB4C83976D3D90D3AD3B75699
security: Mark trusted: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
basic: passing security checks; secureArgs:true, allSigned:false
basic: trusted app: true, -secure=false
basic: JREMatcher:
  JREDesc: JREDesc[version 1.5+, versionType=1, secure=false, heap=-1--1, args=-Xmx128m, href=null, null, null]
  JREInfo: JREInfo for index 2:
    platform is: 9
    product is: 9
    location is: http://java.sun.com/products/autodl/j2se
    path is: /usr/lib/jvm/jdk1.9.0_181_ea/bin/java
    args is:
    native platform is: Linux, i386 [ x86, 32bit ]
    JavaFX runtime is: JavaFX 9 at: null
    enabled is: true
    registered is: true
    system is: false

  Init Heap: -1
  Max Heap: 134217728
  Satisfying: true, true
  SatisfyingVersion: true
  SatisfyingJVMArgs: true, true
  SatisfyingSecure: true
  Selected JVMParam: [JVMParameters: isSecure: true, args:]
  Running JVMParam: [JVMParameters: isSecure: true, args:]
basic: continuing launch in this VM
security: JUT Record:
    javaws application
    file:/home/smm/hcs/testcode/: sourceURL=file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp app_model=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
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 2
basic: not using applet lifecycle
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 5
basic: Main-class: Java9BreaksWhenTest
security: JAVAWS AppPolicy Permission requested for: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
security: Missing Application-Library-Allowable-Codebase manifest attribute for: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
security: Istrusted: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp true
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 6
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 7
Hello World
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at jdk.javaws@9/com.sun.javaws.Launcher.executeApplication(Launcher.java:1741)
at jdk.javaws@9/com.sun.javaws.Launcher.executeMainClass(Launcher.java:1677)
at jdk.javaws@9/com.sun.javaws.Launcher.doLaunchApp(Launcher.java:1525)
at jdk.javaws@9/com.sun.javaws.Launcher.run(Launcher.java:158)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final void java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object) accessible: module java.desktop does not "opens java.awt" to unnamed module @14ad6b8
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:337)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:281)
at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:198)
at java.base/java.lang.reflect.Method.setAccessible(Method.java:192)
at Java9BreaksWhenTest.main(Java9BreaksWhenTest.java:26)
... 9 more
#### Java Web Start Error:
#### Unable to make protected final void java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object) accessible: module java.desktop does not "opens java.awt" to unnamed module @14ad6b8
java.lang.reflect.InaccessibleObjectException: Unable to make protected final void java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object) accessible: module java.desktop does not "opens java.awt" to unnamed module @14ad6b8
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:337)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:281)
at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:198)
at java.base/java.lang.reflect.Method.setAccessible(Method.java:192)
at Java9BreaksWhenTest.main(Java9BreaksWhenTest.java:26)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at jdk.javaws@9/com.sun.javaws.Launcher.executeApplication(Launcher.java:1741)
at jdk.javaws@9/com.sun.javaws.Launcher.executeMainClass(Launcher.java:1677)
at jdk.javaws@9/com.sun.javaws.Launcher.doLaunchApp(Launcher.java:1525)
at jdk.javaws@9/com.sun.javaws.Launcher.run(Launcher.java:158)
at java.base/java.lang.Thread.run(Thread.java:844)
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 6
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 5
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 4
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 3
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 2
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@53ecb046: 1
cache: delayedRemoveResource: file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar
cache: Clean up the reference queue: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: deregisterReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@a9db64dd: 1
cache: delayedRemoveResource: file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: MemoryCache: removed entry file:/home/smm/hcs/testcode/java9BreaksWhenTest.jnlp
cache: MemoryCache: removed entry file:/home/smm/hcs/testcode/Java9BreaksWhenTest.jar


ERROR MESSAGES/STACK TRACES THAT OCCUR :
See actual result.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.Toolkit;
import java.lang.reflect.Method;
import java.lang.IllegalAccessException;
import java.lang.reflect.InvocationTargetException;

public class Java9BreaksWhenTest {

public static void main(String args[]) throws IllegalAccessException, InvocationTargetException {
System.out.println("Hello World");

// Do some dangerous reflection
Toolkit toolkit = Toolkit.getDefaultToolkit();
Class c = toolkit.getClass();
while(true) {
Method m = null;
try {
m = c.getDeclaredMethod("setDesktopProperty", String.class, Object.class);
} catch (NoSuchMethodException ex) {
                     c = c.getSuperclass();
                     if (c!=null)
                         continue;
         } catch (SecurityException ex) {
ex.printStackTrace();
         }
                 if (m!=null) {
m.setAccessible(true);
m.invoke(toolkit, "awt.font.desktophints", null);
         System.out.println("desktop Properties changed.");
                 }
break;
                }
}
}

MANIFEST.MF:
Manifest-Version: 1.0
Created-By: 1.8.0_51 (Oracle Corporation)
Application-Name: Java9BreaksWhenTest
Name: Java9BreaksWhenTest.class
Main-Class: Java9BreaksWhenTest
Permissions: all-permissions
Codebase: *

java9BreaksWhenTest.jnlp:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="file:///home/smm/hcs/testcode" href="java9BreaksWhenTest.jnlp">
    <information>
        <title>Java 9 Breaks When Test</title>
        <vendor>HCS</vendor>
        <homepage href="http://hcs.us.com"/>
        <description>Java 9 Breaks When Test</description>
        <description kind="short">Java 9 Breaks When Test</description>
      </information>
    <security><all-permissions/></security>
    <update check="timeout" policy="always"/>
    <resources>
        <j2se version="1.5+" java-vm-args="-Xmx128m" />
        <jar href="Java9BreaksWhenTest.jar" main="true" download="eager"/>
    </resources>
    <application-desc main-class="Java9BreaksWhenTest">
    </application-desc>
</jnlp>

---------- END SOURCE ----------