[rules-users] Need Help: Errors while running FibonacciExample

[Marcus Ilgner]

Hi Venkatesh,

On 2/19/07, venkatesh devalapura nagabhushana <venkatesh.nag at wipro.com>
wrote:
>
>
> Hi,
>
> After successfully compiling the example code FibnacciExample.java, I
> tried to run it, I get the following error, let me know how to solve it:
>
> java FibonacciExample
> Exception in thread "main" java.lang.ExceptionInInitializerError
>    at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0)
>    at org.drools.semantics.java.RuleBuilder.<clinit>() (Unknown Source)
>    at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0)
>    at
> org.drools.compiler.PackageBuilder.addRule(org.drools.lang.descr.RuleDescr)
> (Unknown Source)
>    at
> org.drools.compiler.PackageBuilder.addPackage(
> org.drools.lang.descr.PackageDescr) (Unknown Source)
>    at
> org.drools.compiler.PackageBuilder.addPackageFromDrl(java.io.Reader)
> (Unknown Source)
>    at FibonacciExample.main(java.lang.String[]) (Unknown Source)
>    at gnu.java.lang.MainThread.call_main() (/usr/lib/libgcj.so.6.0.0)
>    at gnu.java.lang.MainThread.run() (/usr/lib/libgcj.so.6.0.0)
> Caused by: java.util.regex.PatternSyntaxException: At position 2 in
> regular expression pattern:
> expected end of character class
>         (.*)\bmodify\s*\(([^)]+)\)(.*)
>           ^
>    at java.util.regex.Pattern.Pattern(java.lang.String, int)
> (/usr/lib/libgcj.so.6.0.0)
>    at java.util.regex.Pattern.compile(java.lang.String, int)
> (/usr/lib/libgcj.so.6.0.0)
>    at org.drools.semantics.java.KnowledgeHelperFixer.<clinit>() (Unknown
> Source)   at java.lang.Class.initializeClass()
> (/usr/lib/libgcj.so.6.0.0)
>    ...8 more
>
> Is it require to place .drl file in the same directory as that of the
> source code ?
>
> Thanks,
> Venkatesh



What JDK are you using? "/usr/lib/libgcj.so.6.0.0" and "gnu.java.lang" makes
me think that it's GNU Classpath or something like that. It is quite
possible that there are incompatibilities with that runtime.
Have you tried running it with Sun's JDK?

Best regards
Marcus
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