[
https://jira.jboss.org/browse/JBRULES-2751?page=com.atlassian.jira.plugin...
]
Geoffrey De Smet updated JBRULES-2751:
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Summary: NullPointerException in DeclarationTypeFixer: An rule compilation error
should give a clear errow warning with an indication of which rule is the culprit instead
of a NPE (was: NullPointerException in DeclarationTypeFixer: An rule compilation error
should give a clear errow warning with an indecation of which rule is the culprit instead
of a NPE)
NullPointerException in DeclarationTypeFixer: An rule compilation
error should give a clear errow warning with an indication of which rule is the culprit
instead of a NPE
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Key: JBRULES-2751
URL:
https://jira.jboss.org/browse/JBRULES-2751
Project: Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: drools-compiler (expert)
Affects Versions: 5.1.1.FINAL
Reporter: Geoffrey De Smet
Assignee: Edson Tirelli
Fix For: 5.2.0.M1
{code}
Exception in thread "main" java.lang.NullPointerException
at
org.drools.rule.builder.dialect.java.DeclarationTypeFixer.fix(DeclarationTypeFixer.java:17)
at
org.drools.rule.builder.dialect.java.AbstractJavaRuleBuilder.createVariableContext(AbstractJavaRuleBuilder.java:90)
at
org.drools.rule.builder.dialect.java.JavaAccumulateBuilder.build(JavaAccumulateBuilder.java:112)
at
org.drools.rule.builder.dialect.java.JavaAccumulateBuilder.build(JavaAccumulateBuilder.java:54)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:223)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:108)
at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69)
at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:79)
at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1149)
at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:631)
at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:270)
at
org.drools.planner.config.localsearch.LocalSearchSolverConfig.buildRuleBase(LocalSearchSolverConfig.java:209)
at
org.drools.planner.config.localsearch.LocalSearchSolverConfig.buildSolver(LocalSearchSolverConfig.java:186)
at
org.drools.planner.config.XmlSolverConfigurer.buildSolver(XmlSolverConfigurer.java:93)
at
org.drools.planner.examples.cloudbalancing.app.CloudBalancingApp.createSolver(CloudBalancingApp.java:43)
at
org.drools.planner.examples.common.app.CommonApp.createSolutionBusiness(CommonApp.java:59)
at org.drools.planner.examples.common.app.CommonApp.<init>(CommonApp.java:38)
at
org.drools.planner.examples.cloudbalancing.app.CloudBalancingApp.<init>(CloudBalancingApp.java:30)
at
org.drools.planner.examples.cloudbalancing.app.CloudBalancingApp.main(CloudBalancingApp.java:36)
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:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:115)
{code}
Here's the rule which causes this:
{code}
rule "minimalCpuPowerTotal"
when
$cloudComputer : CloudComputer($cpuPower : cpuPower)
$minimalCpuPowerTotal : Number(intValue > $cpuPower) from accumulate(
CloudAssignment(
cloudComputer == $cloudComputer,
$minimalCpuPower : minimalCpuPower), // This is the problem,
CloudAssignment.getMinimalCpuPower does not exist yet
sum($minimalCpuPower)
)
then
insertLogical(new IntConstraintOccurrence("minimalCpuPowerTotal",
ConstraintType.NEGATIVE_HARD,
$minimalCpuPowerTotal - $cpuPower,
$cloudComputer));
end
{code}
CloudAssignment did not have a getter for minimalCpuPower yet.
The compilation error should clearly say that its the rule minimalCpuPowerTotal which has
a problem and that the getter for the field minimalCpuPower wasn't found.
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