[jira] [Created] (ISIS-1498) BackgroundCommandExecution does not handle exceptions correctly.

[Dan Haywood (JIRA)]

Dan Haywood created ISIS-1498:
---------------------------------

             Summary: BackgroundCommandExecution does not handle exceptions 
correctly.
                 Key: ISIS-1498
                 URL: https://issues.apache.org/jira/browse/ISIS-1498
             Project: Isis
          Issue Type: Bug
          Components: Core
    Affects Versions: 1.13.0
            Reporter: Dan Haywood
            Assignee: Dan Haywood
            Priority: Minor
             Fix For: 1.13.1


Seen two separate issues.

First, when there was a mismatch in arguments to parameters (see ISIS-1497), 
this resulted in an NPE in this line of the catch block:

{code}
Exception unused = backgroundInteraction.getPriorExecution().getThrew();
{code}

specifically, getPriorExecution() returned null.

Then, when I worked around that issue so that the action could be invoked but 
when executed threw an exception, resulted in an NPE in this line of the catch 
block:

{code}
backgroundInteraction.getCurrentExecution().setThrew(e);
{code}

Here, getCurrentExecution() returned null.



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