[rules-users] NoClassDefFoundError for BaseObjectClassFieldExtractor when running in Tomcat

[Fernando Meyer]

You should add the drools-core library as a required dependency.

Fernando Meyer http://fmeyer.org
fmcamargo at gmail.com
PGP: 0xD804DDFB



On Jul 17, 2007, at 9:55 AM, Jesse Stockall wrote:

> Tomcat 5.5
> Java 1.5
> jbossrules-4.0.0.12865MR3
>
> I have an instance of Drools running inside a webapp deployed on  
> Tomcat. The rules have been compiled ahead of time and are loaded  
> in with:
>
> InputStream is = PolicyRuntime.class.getResourceAsStream(name);
> DroolsObjectInputStream in = new DroolsObjectInputStream(is);
> Package p = (Package) in.readObject();
>
> When run outside Tomcat it loads fine, when run inside Tomcat I get:
>
> java.lang.NoClassDefFoundError: org/drools/base/extractors/ 
> BaseObjectClassFieldExtractor
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
> at org.drools.base.ClassFieldExtractorFactory 
> $ByteArrayClassLoader.defineClass(ClassFieldExtractorFactory.java:455)
> at org.drools.base.ClassFieldExtractorFactory.getClassFieldExtractor 
> (ClassFieldExtractorFactory.java:114)
> at org.drools.base.ClassFieldExtractor.init 
> (ClassFieldExtractor.java:77)
> at org.drools.base.ClassFieldExtractor.<init> 
> (ClassFieldExtractor.java:57)
> at org.drools.base.ClassFieldExtractorCache.getExtractor 
> (ClassFieldExtractorCache.java:35)
> at org.drools.base.ClassFieldExtractor.readResolve 
> (ClassFieldExtractor.java:72)
>
> I've tried adding DroolsObjectInputStream.class.getClassLoader() ,  
> PolicyRuntime.class.getClassLoader() and Thread.currentThread 
> ().getContextClassLoader() to the constructor of the  
> DroolsObjectInputStream but none had any effect.
>
> Thanks
>
> Jesse
>
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