ClassNotFoundException at HostServicesDelegate

[Kevin Rushforth]

Hi Yasumasa,

No, this is not a correct solution as it just masks the problem. A 
likely solution will be to refactor the code to provide an alternative 
implementation of HostServicesDelegate in case the javafx.deploy module 
is not loaded (either in the case of a purely open build of OpenJFX or 
in the case where the deploy module doesn't get loaded by default).

-- Kevin


Yasumasa Suenaga wrote:
> Hi Kevin,
>
>>    java -addmods javafx.deploy ....
>>
>> We will need a fix that doesn't require this.
>
> I guess you will fix to add exports directive to module-info.java in 
> closed source.
> However, I think we should fix as below:
>
> ----------------
> diff -r 3597495167c7 
> modules/graphics/src/main/java/com/sun/javafx/application/HostServicesDelegate.java 
>
> --- 
> a/modules/graphics/src/main/java/com/sun/javafx/application/HostServicesDelegate.java       
> Tue Jun 28 01:48:07 2016 +0530
> +++ 
> b/modules/graphics/src/main/java/com/sun/javafx/application/HostServicesDelegate.java       
> Wed Jun 29 23:53:07 2016 +0900
> @@ -55,7 +55,6 @@
>                                  getInstanceMeth = 
> factoryClass.getMethod(
>                                          "getInstance", 
> Application.class);
>                              } catch (Exception ex) {
> -                                ex.printStackTrace();
>                                  return null;
>                              }
>                          }
> ----------------
>
> Otherwise, the user who uses pure OpenJFX will see this stack trace.
> I think this exception can be ignored.
> So it should not be printed.
>
>
> Thanks,
>
> Yasumasa
>
>
> On 2016/06/29 0:44, Kevin Rushforth wrote:
>> A workaround is:
>>
>>    java -addmods javafx.deploy ....
>>
>> We will need a fix that doesn't require this.
>>
>> -- Kevin
>>
>>
>> Kevin Rushforth wrote:
>>> Thanks for the pointer. That was enough for me to reproduce the bug. 
>>> I filed the following issue to track it:
>>>
>>> https://bugs.openjdk.java.net/browse/JDK-8160464
>>>
>>> -- Kevin
>>>
>>>
>>> Yasumasa Suenaga wrote:
>>>>
>>>> Hi Kevin,
>>>>
>>>> I use JDK 9 EA b124 for Windows x64 from java.net <http://java.net>.
>>>>   https://jdk9.java.net/download/
>>>>
>>>> If you want to full stack trace, please download from here:
>>>>   
>>>> http://icedtea.classpath.org/bugzilla/attachment.cgi?id=1540&action=edit 
>>>> <http://icedtea.classpath.org/bugzilla/attachment.cgi?id=1540&action=edit> 
>>>>
>>>>
>>>> This exception does not occur on OracleJDK 8. So I guess this 
>>>> exception is  from Java FX 9.
>>>>
>>>> Thanks,
>>>>
>>>> Yasumasa
>>>>
>>>> 2016/06/28 23:52 "Kevin Rushforth" <kevin.rushforth at oracle.com 
>>>> <mailto:kevin.rushforth at oracle.com>>:
>>>>
>>>>     Hi Yasumasa,
>>>>
>>>>     I assume this is a download of the Oracle JDK from java.net
>>>>     <http://java.net>? We haven't seen any problems like this, so it
>>>>     might be a problem with HeapStats analyzer. The class in question
>>>>     is a closed-source class that lives in the javafx.deploy module.
>>>>     What exactly are you running?
>>>>
>>>>     -- Kevin
>>>>
>>>>
>>>>     Yasumasa Suenaga wrote:
>>>>
>>>>         Hi all,
>>>>
>>>>         When I ran HeapStats Analyzer [1] on JDK 9 EA b124, I
>>>>         encountered ClassNotFoundException as below:
>>>>         ------------
>>>>         java.lang.ClassNotFoundException:
>>>>         com.sun.deploy.uitoolkit.impl.fx.HostServicesFactory
>>>>                 at
>>>>         
>>>> jdk.internal.loader.BuiltinClassLoader.loadClass(java.base at 9-ea/BuiltinClassLoader.java:366) 
>>>>
>>>>
>>>>                 at
>>>>         
>>>> java.lang.ClassLoader.loadClass(java.base at 9-ea/ClassLoader.java:419)
>>>>                 at java.lang.Class.forName0(java.base at 9-ea/Native 
>>>> Method)
>>>>                 at 
>>>> java.lang.Class.forName(java.base at 9-ea/Class.java:378)
>>>>                 at
>>>>         
>>>> com.sun.javafx.application.HostServicesDelegate.lambda$getInstance$0(javafx.graphics at 9-ea/HostServicesDelegate.java:52) 
>>>>
>>>>
>>>>                   :
>>>>         ------------
>>>>
>>>>         This message does not appear on JDK 8u92.
>>>>         I think this message is printed at [2].
>>>>
>>>>         I think this exception message do not need to be printed.
>>>>         At least, it is debug level.
>>>>
>>>>         Does someone work for it?
>>>>         If not so, I want to contribute patch.
>>>>
>>>>
>>>>         Thanks,
>>>>
>>>>         Yasumasa
>>>>
>>>>
>>>>         [1] http://icedtea.classpath.org/wiki/HeapStats
>>>>         [2]
>>>>         
>>>> http://hg.openjdk.java.net/openjfx/9-dev/rt/file/3597495167c7/modules/graphics/src/main/java/com/sun/javafx/application/HostServicesDelegate.java#l58 
>>>>
>>>>
>>>>