Drools error null pointer

Had the same problem and worked fine after adding. drl file to classpath, as discussed in following thread 46999. com/ Null- pointer- exception- when- adding- drools- to- existing- project- td4027944. Problem is solved using this dependency in my POM xml. < dependency> < groupId> org. drools< / groupId> < artifactId> drools- workbench- models- guided- dtable< / artifactId> < version> 7. Final< / version> < / dependency>. Tried the code, the NPE is caused by " $ value" - > " Method threw ' java. NullPointerException' exception. Cannot evaluate org. This is due to the Metric class not having any getter methods for its fields. DROOLS- 2210Drools 7.

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    Pointer error drools

    0 serialization null pointer exceptions with sliding windows · Bug DROOLS- 2475Upgrade Jackson. Similar errors when compiling from scorecard source. Is this still WIP or a regression of. This looks like a bug, I suggest you submit a JIRA to the project. Which version are you using? At the same time, your rule is more complicated than it should. Every time you see an " if" in the consequence, it is a red looks drools kie- api/ internal library execution looks for mandatory values under. whatever you have as those properties in pom. xml and putting them in pom. properties fixed my problem. The agenda- group is only used to group the rules that you want to be executed together. All of the rules in your Knowledge Base are still going to be evaluated when needed, no matter what agenda- group they belong to. A NullPointerException shouldn' t happen during compilation: either you get a clear compilation error during parsing ( which includes line number) or it works. This is probably already fixed in a newer version.

    This works for me, at least with with a correct DRL file. I suggest that you add. println( " Builder: " + builder) ; if( builder. hasErrors( ) ) { System. println ( " Builder has errors! " ) ; } If this shows that there are errors, use. I am using guvnor. war and drools 6. Beta5 deployed in tomcat. I am successfully able. newKnowledgeAgentConfiguration( ) ;. error stack: Exception in thread " main" java. NullPointerException at org.