[rules-users] Mvel compilation error

[Godmar Back]

This is not a compilation error, it's a runtime error.  It means
you're passing a wrong type.
For instance, you may do:

   f.m(x)

where method m is declared to take a type T, but you pass an object x
of type S which is not a subtype of T.
To debug this, examine the arguments in the section of code.

Also, insert statements such as:

 if (!(x instanceof T))
    System.err.println(....)

before the call to f or use asserts.

 - Godmar

On Fri, Jul 18, 2008 at 10:57 AM, Edson Tirelli <tirelli at post.com> wrote:
>
>    Hey John, I know it is difficult, but we need some way to reproduce...
> can you isolate a few rules and run them in a loop trying to force the
> exception?
>
>
> 2008/7/17 John Squire <jc_squire at hotmail.com>:
>>
>> Hi All,
>>
>> We are intermittently getting mvel compilation errors with the following:
>>
>> Caused by: java.lang.IllegalArgumentException: object is not an instance
>> of declaring class
>>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>         at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>         at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>         at java.lang.reflect.Method.invoke(Method.java:585)
>>         at
>> org.mvel.optimizers.impl.refl.MethodAccessor.getValue(MethodAccessor.java:61)
>>         ... 148 more
>>
>> The rules compile ok and the application will run normally (rules
>> processing successfully) for a few days then this error will occur. Tried to
>> replicate but once the application is restarted the last action before the
>> failure is repeated and always processes successfully.
>>
>> Any help would be appreciated.
>>
>> Regards
>> JS
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
>
>
> --
> Edson Tirelli
> JBoss Drools Core Development
> JBoss, a division of Red Hat @ www.jboss.com
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>