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Re: [ptp-dev] CoreException/NullPointerException after selecting connection in Profile Configuration Dialog
Hi Dave,

It’s actually failing with a ClassCastException at line 142 of ContextFinder because the created context is not an instance of JAXBContext. So it looks like you have two different versions of JAXB installed somehow. JAXB is one of the “problem" packages because of the way it dynamically loads classes. I suspect it’s something to do with the Java version, or possibly the changes that were made to support Java 12.

Greg

On Nov 5, 2019, at 2:16 PM, David Wootton <dwootton@xxxxxxxxxx> wrote:

I'm encountering a problem with my plugin. I open a profile configuration dialog select a target system configuration and then a connection name. At that point I get a popup with the title 'Launch Error' and only an icon in the message area. There is no message. I tracked down that this comes from one of two instances of PTPLaunchPlugin.errorDialog. That is being called due to a CoreException, which is in turn caused by catching an Exception (NullPointerException)
The top of the traceback for the null pointer exception is included with this email
I tried looking at variables in the stack. The target system configuration string that is passed to LaunchController.realizeRMDataFromXML is a simple target system configuration with a single tab with a GridLayout and only contains a label widget. I wrote this three years ago and it has not changed since.
The javax.xml.bind.JAXBContext.newInstance method at line 375 is being passed org.eclipse.ptp.rm.jaxb.core.data which seems reasonable

I am stuck at Eclipse version 2019-03 for this for support reasons. I'm running Java 1.8.0_181

The odd thing is that I have an Eclipse plugin version of the code and a RCP version, where the profile configuration dialog code should be the same for both. The RCP version works fine.

I have made changes to target system configurations, but not this one, in recent months, and also to a separate JAXB ETFW XML file, but I don't know what I could have done to cause these failures.

I know there's not much to go on here, but I'm wondering if this might be something familiar, or what else I might look at to figure out what's going on.

Thanks
Dave

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