[jboss-jira] [JBoss JIRA] (JBRULES-3685) NullPointerException in DefaultConsequenceInvoker at evaluate()
Radai Rosenblatt (JIRA)
jira-events at lists.jboss.org
Mon Nov 12 00:47:18 EST 2012
[ https://issues.jboss.org/browse/JBRULES-3685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Radai Rosenblatt updated JBRULES-3685:
--------------------------------------
Description:
i have a rule that looks like this:
{code}
rule "bad node status"
when
$ruleIdString1 : [get from somewhere]
$node1 : Node($idString1 : idString)
$hostStatus1 : HostStatus($status1 : status , nodeIdString == $idString1 , status != "up") from entry-point "Event Stream"
then
Map alertParams = new HashMap();
alertParams.put("0",($status1));
Map reportParams = null;
Map reportFieldValues = null;
String component = null;
alerts.issueAlert($idString1 , UUID.fromString($ruleIdString1) , alertParams , reportParams, reportFieldValues, component);
end
{code}
this causes drools to generate a class by the name of Rule_Bad_Node_Status_0DefaultConsequenceInvoker.java with the following bit of code:
{code}
public void evaluate(org.drools.spi.KnowledgeHelper knowledgeHelper,
org.drools.WorkingMemory workingMemory) throws Exception {
org.drools.spi.Tuple tuple = knowledgeHelper.getTuple();
org.drools.rule.Declaration[] declarations = knowledgeHelper.getRule().getDeclarations();
org.drools.common.InternalFactHandle $ruleIdString1__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[1].getIdentifier() ) );
java.lang.String $ruleIdString1 = ( java.lang.String ) declarations[1].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $ruleIdString1__Handle__.getObject() );
$ruleIdString1__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $ruleIdString1 );
knowledgeHelper.getIdentityMap().put($ruleIdString1, $ruleIdString1__Handle__ );
org.drools.common.InternalFactHandle $idString2__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[3].getIdentifier() ) );
java.lang.String $idString2 = ( java.lang.String ) declarations[3].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $idString2__Handle__.getObject() );
$idString2__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $idString2 );
knowledgeHelper.getIdentityMap().put($idString2, $idString2__Handle__ );
org.drools.common.InternalFactHandle $status1__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[5].getIdentifier() ) );
java.lang.String $status1 = ( java.lang.String ) declarations[5].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $status1__Handle__.getObject() );
$status1__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $status1 ); //NullPointerException here
knowledgeHelper.getIdentityMap().put($status1, $status1__Handle__ );
com.emc.dpa.analysis.Alerts alerts = ( com.emc.dpa.analysis.Alerts ) workingMemory.getGlobal( "alerts" );
Rule_Bad_Node_Status_0.defaultConsequence (
knowledgeHelper,
$ruleIdString1, $ruleIdString1__Handle__
, $idString2, $idString2__Handle__
, $status1, $status1__Handle__
,
alerts
);
}
{code}
if, for some reason, the value for HostStatus.status is null i get a NPE from the commented line in the above code. the stack trace looks like this:
{code}
Caused by: java.lang.NullPointerException
at org.drools.common.EqualityAssertMapComparator.hashCodeOf(EqualityAssertMapComparator.java:48) [drools-core.jar:5.1.1]
at org.drools.core.util.ObjectHashMap.get(ObjectHashMap.java:100) [drools-core.jar:5.1.1]
at org.drools.common.SingleThreadedObjectStore.getHandleForObject(SingleThreadedObjectStore.java:122) [drools-core.jar:5.1.1]
at org.drools.common.AbstractWorkingMemory.getFactHandle(AbstractWorkingMemory.java:861) [drools-core.jar:5.1.1]
at [package].Rule_Bad_Node_Status_0DefaultConsequenceInvoker.evaluate(Rule_Bad_Node_Status_0DefaultConsequenceInvoker.java:33)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:917) [drools-core.jar:5.1.1]
... 101 more
{code}
i think this is related to the line in the then section that reads "alertParams.put("0",($status1));" but i think putting null into a map should be possible.
was:
i have a rule that looks like this:
{code}
rule "bad node status"
when
$ruleIdString1 : [get from somewhere]
$node1 : Node($idString1 : idString)
$hostStatus1 : HostStatus($status1 : status , nodeIdString == $idString1 , status != "up") from entry-point "Event Stream"
then
Map alertParams = new HashMap();
alertParams.put("0",($status1));
Map reportParams = null;
Map reportFieldValues = null;
String component = null;
alerts.issueAlert($idString1 , UUID.fromString($ruleIdString1) , alertParams , reportParams, reportFieldValues, component);
end
{code}
this causes drools to generate a class by the name of Rule_Bad_Node_Status_0DefaultConsequenceInvoker.java with the following bit of code:
{code}
public void evaluate(org.drools.spi.KnowledgeHelper knowledgeHelper,
org.drools.WorkingMemory workingMemory) throws Exception {
org.drools.spi.Tuple tuple = knowledgeHelper.getTuple();
org.drools.rule.Declaration[] declarations = knowledgeHelper.getRule().getDeclarations();
org.drools.common.InternalFactHandle $ruleIdString1__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[1].getIdentifier() ) );
java.lang.String $ruleIdString1 = ( java.lang.String ) declarations[1].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $ruleIdString1__Handle__.getObject() );
$ruleIdString1__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $ruleIdString1 );
knowledgeHelper.getIdentityMap().put($ruleIdString1, $ruleIdString1__Handle__ );
org.drools.common.InternalFactHandle $idString2__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[3].getIdentifier() ) );
java.lang.String $idString2 = ( java.lang.String ) declarations[3].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $idString2__Handle__.getObject() );
$idString2__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $idString2 );
knowledgeHelper.getIdentityMap().put($idString2, $idString2__Handle__ );
org.drools.common.InternalFactHandle $status1__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[5].getIdentifier() ) );
java.lang.String $status1 = ( java.lang.String ) declarations[5].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $status1__Handle__.getObject() );
$status1__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $status1 ); //NullPointerException here
knowledgeHelper.getIdentityMap().put($status1, $status1__Handle__ );
com.emc.dpa.analysis.Alerts alerts = ( com.emc.dpa.analysis.Alerts ) workingMemory.getGlobal( "alerts" );
Rule_Bad_Node_Status_0.defaultConsequence (
knowledgeHelper,
$ruleIdString1, $ruleIdString1__Handle__
, $idString2, $idString2__Handle__
, $status1, $status1__Handle__
,
alerts
);
}
{code}
if, for some reason, the value for HostStatus is null i get a NPE from the commented line in the above code. the stack trace looks like this:
{code}
Caused by: java.lang.NullPointerException
at org.drools.common.EqualityAssertMapComparator.hashCodeOf(EqualityAssertMapComparator.java:48) [drools-core.jar:5.1.1]
at org.drools.core.util.ObjectHashMap.get(ObjectHashMap.java:100) [drools-core.jar:5.1.1]
at org.drools.common.SingleThreadedObjectStore.getHandleForObject(SingleThreadedObjectStore.java:122) [drools-core.jar:5.1.1]
at org.drools.common.AbstractWorkingMemory.getFactHandle(AbstractWorkingMemory.java:861) [drools-core.jar:5.1.1]
at [package].Rule_Bad_Node_Status_0DefaultConsequenceInvoker.evaluate(Rule_Bad_Node_Status_0DefaultConsequenceInvoker.java:33)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:917) [drools-core.jar:5.1.1]
... 101 more
{code}
im guessing this is somehow related to my line in the then section taht reads
> NullPointerException in DefaultConsequenceInvoker at evaluate()
> ---------------------------------------------------------------
>
> Key: JBRULES-3685
> URL: https://issues.jboss.org/browse/JBRULES-3685
> Project: Drools
> Issue Type: Bug
> Security Level: Public(Everyone can see)
> Components: drools-core (expert)
> Affects Versions: 5.1.1.FINAL
> Environment: java 6, windows 7 x64
> Reporter: Radai Rosenblatt
> Assignee: Mark Proctor
>
> i have a rule that looks like this:
> {code}
> rule "bad node status"
> when
> $ruleIdString1 : [get from somewhere]
> $node1 : Node($idString1 : idString)
> $hostStatus1 : HostStatus($status1 : status , nodeIdString == $idString1 , status != "up") from entry-point "Event Stream"
> then
> Map alertParams = new HashMap();
> alertParams.put("0",($status1));
> Map reportParams = null;
> Map reportFieldValues = null;
> String component = null;
> alerts.issueAlert($idString1 , UUID.fromString($ruleIdString1) , alertParams , reportParams, reportFieldValues, component);
> end
> {code}
> this causes drools to generate a class by the name of Rule_Bad_Node_Status_0DefaultConsequenceInvoker.java with the following bit of code:
> {code}
> public void evaluate(org.drools.spi.KnowledgeHelper knowledgeHelper,
> org.drools.WorkingMemory workingMemory) throws Exception {
> org.drools.spi.Tuple tuple = knowledgeHelper.getTuple();
> org.drools.rule.Declaration[] declarations = knowledgeHelper.getRule().getDeclarations();
>
> org.drools.common.InternalFactHandle $ruleIdString1__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[1].getIdentifier() ) );
> java.lang.String $ruleIdString1 = ( java.lang.String ) declarations[1].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $ruleIdString1__Handle__.getObject() );
> $ruleIdString1__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $ruleIdString1 );
> knowledgeHelper.getIdentityMap().put($ruleIdString1, $ruleIdString1__Handle__ );
>
> org.drools.common.InternalFactHandle $idString2__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[3].getIdentifier() ) );
> java.lang.String $idString2 = ( java.lang.String ) declarations[3].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $idString2__Handle__.getObject() );
> $idString2__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $idString2 );
> knowledgeHelper.getIdentityMap().put($idString2, $idString2__Handle__ );
>
> org.drools.common.InternalFactHandle $status1__Handle__ = ( org.drools.common.InternalFactHandle ) tuple.get( knowledgeHelper.getDeclaration( declarations[5].getIdentifier() ) );
> java.lang.String $status1 = ( java.lang.String ) declarations[5].getValue((org.drools.common.InternalWorkingMemory) workingMemory, $status1__Handle__.getObject() );
> $status1__Handle__ = (org.drools.common.InternalFactHandle) knowledgeHelper.getWorkingMemory().getFactHandle( $status1 ); //NullPointerException here
> knowledgeHelper.getIdentityMap().put($status1, $status1__Handle__ );
>
> com.emc.dpa.analysis.Alerts alerts = ( com.emc.dpa.analysis.Alerts ) workingMemory.getGlobal( "alerts" );
>
> Rule_Bad_Node_Status_0.defaultConsequence (
> knowledgeHelper,
> $ruleIdString1, $ruleIdString1__Handle__
> , $idString2, $idString2__Handle__
> , $status1, $status1__Handle__
> ,
> alerts
> );
> }
> {code}
> if, for some reason, the value for HostStatus.status is null i get a NPE from the commented line in the above code. the stack trace looks like this:
> {code}
> Caused by: java.lang.NullPointerException
> at org.drools.common.EqualityAssertMapComparator.hashCodeOf(EqualityAssertMapComparator.java:48) [drools-core.jar:5.1.1]
> at org.drools.core.util.ObjectHashMap.get(ObjectHashMap.java:100) [drools-core.jar:5.1.1]
> at org.drools.common.SingleThreadedObjectStore.getHandleForObject(SingleThreadedObjectStore.java:122) [drools-core.jar:5.1.1]
> at org.drools.common.AbstractWorkingMemory.getFactHandle(AbstractWorkingMemory.java:861) [drools-core.jar:5.1.1]
> at [package].Rule_Bad_Node_Status_0DefaultConsequenceInvoker.evaluate(Rule_Bad_Node_Status_0DefaultConsequenceInvoker.java:33)
> at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:917) [drools-core.jar:5.1.1]
> ... 101 more
> {code}
> i think this is related to the line in the then section that reads "alertParams.put("0",($status1));" but i think putting null into a map should be possible.
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