Experimental Physics and
Industrial Control System

Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> · Tue, 25 Aug 2020 13:42:58 +0000

It appears that the CORBA dependency in pvAccess was removed in this commit in June 2018.

https://github.com/epics-base/epicsCoreJava/commit/1d300d365c91b7fdc89bb93ee4d7b4b3241c734a#diff-91dff54d9f3689d9045dbd98eea6b1f2

I will work on updating ADViewers to use the most recent pvAccess jar files.

Mark

-----Original Message-----
From: J. Lewis Muir <jlmuir at imca-cat.org> 
Sent: Wednesday, August 19, 2020 5:45 PM
To: Gofron, Kazimierz <kgofron at bnl.gov>
Cc: Mark Rivers <rivers at cars.uchicago.edu>; tech-talk at aps.anl.gov
Subject: Re: ADViewers: EPICS_NTNDA_VIEWER' does not connect - ADViewers

On 08/19, Gofron, Kazimierz via Tech-talk wrote:
> The problem is in the epics-pvaccess-5.1.1.jar. Were these jar files created with Java 8?
> 
> kaz@kaz-desktop:/epics/utils/ADViewers/ImageJ/EPICS_areaDetector$ 
> strings epics-pvaccess-5.1.1.jar | grep BlockingTCPConnector 
> org/epics/pvaccess/client/impl/remote/tcp/BlockingTCPConnector$Transpo
> rtFactory.class 
> org/epics/pvaccess/client/impl/remote/tcp/BlockingTCPConnector.class
> org/epics/pvaccess/client/impl/remote/tcp/BlockingTCPConnector$Transpo
> rtFactory.classPK 
> org/epics/pvaccess/client/impl/remote/tcp/BlockingTCPConnector.classPK

Where's the source code for the epics-pvaccess-5.1.1.jar?  Is it the following?

  https://github.com/epics-rip/pvAccessJava/tree/5.1.1

If so, that code contains three classes that reference classes in the org.omg.CORBA package that have been removed in Java 11:

  src/org/epics/pvaccess/impl/remote/IntrospectionRegistry.java
  src/org/epics/pvaccess/util/IntHashMap.java
  src/org/epics/pvaccess/util/ShortHashMap.java

I don't know anything about pvAccessJava, but if the latest version is at

  https://github.com/epics-base/epicsCoreJava

then a search for "corba" there shows that it does not contain references to classes in the org.omg.CORBA package, so if you can upgrade to a newer version of pvAccessJava that does not reference CORBA classes, then I think the problem would go away.

Another solution would be to add JARs to the Java classpath providing the CORBA classes such as from JacORB:

  https://github.com/JacORB/JacORB

Yet another solution would of course be to use a Java 8 VM instead of a Java 11 VM.

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System