[rules-users] Exception when using retract
Sara Didaci
sara.didaci at eximia.it
Fri Jun 13 06:25:16 EDT 2014
Hi
i have a problem that seems to me quite similar to this
http://drools.46999.n3.nabble.com/rules-users-Exception-when-using-retract-td4023520.html
(i cannot reply to this post, don't Know why)
In my case exception is
java.lang.NullPointerException
at
ConditionEvaluator9935e5dba4084774a05641a0448cd694.evaluate(Unknown Source)
at
org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:200)
at
org.drools.rule.constraint.MvelConstraint.isAllowedCachedLeft(MvelConstraint.java:169)
at
org.drools.common.DoubleBetaConstraints.isAllowedCachedLeft(DoubleBetaConstraints.java:88)
at org.drools.reteoo.NotNode.assertLeftTuple(NotNode.java:78)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:232)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.propagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:89)
at org.drools.reteoo.JoinNode.propagateFromLeft(JoinNode.java:107)
at org.drools.reteoo.JoinNode.assertLeftTuple(JoinNode.java:95)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:232)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:116)
at
org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:154)
at
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350)
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:311)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847)
at
org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269)
at
it.eximia.meerkat.re.core.RuleEngine.executeSession(RuleEngine.java:212)
at it.eximia.meerkat.re.core.RuleEngine.run(RuleEngine.java:180)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
|#]
[#|2014-06-07T04:05:11.418+0200|WARNING|sun-appserver2.1|RuleEngine|_ThreadID=25;_ThreadName=pool-5-thread-1;_RequestID=b189af67-c681-411d-ad8c-44f1ec1646bf;|errore
nel Rule Engine
Exception executing consequence for rule "temperatura normale" in
it.sure.template: java.lang.NullPointerException
at
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297)
at
org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)
at
org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
at
org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:230)
at
it.eximia.meerkat.re.core.RuleEngine.executeSession(RuleEngine.java:215)
at it.eximia.meerkat.re.core.RuleEngine.run(RuleEngine.java:180)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at
org.drools.core.util.index.LeftTupleIndexHashTable.remove(LeftTupleIndexHashTable.java:370)
at org.drools.reteoo.NotNode.retractLeftTuple(NotNode.java:214)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateRetractLeftTuple(CompositeLeftTupleSinkAdapter.java:250)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.propagateRetractRightTuple(CompositeLeftTupleSinkAdapter.java:165)
at org.drools.reteoo.JoinNode.retractRightTuple(JoinNode.java:184)
at
org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:283)
at
org.drools.reteoo.EntryPointNode.retractObject(EntryPointNode.java:354)
at org.drools.common.NamedEntryPoint.retract(NamedEntryPoint.java:568)
at
org.drools.base.DefaultKnowledgeHelper.retract(DefaultKnowledgeHelper.java:357)
at
it.sure.template.Rule_temperatura_normale_53fab538df67455491288390ebd5c29c.defaultConsequence(Rule_temperatura_normale_53fab538df67455491288390ebd5c29c.java:49)
at
it.sure.template.Rule_temperatura_normale_53fab538df67455491288390ebd5c29cDefaultConsequenceInvokerGenerated.evaluate(Unknown
Source)
at
it.sure.template.Rule_temperatura_normale_53fab538df67455491288390ebd5c29cDefaultConsequenceInvoker.evaluate(Unknown
Source)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
... 16 more
|#]
i'm using drools 5.5.0 Final
here is the rule, (i removed some statements don't seems relevant)
rule "temperatura normale"
salience -2
when
$nowTimestamp : ExecutionTimestamp()
$event: ScalarEvent(name == "TEMPERATURE_EVENT", $creation:
creationDateTime, $uuid : sensorUUID ) from entry-point "event"
not(ScalarEvent(name == "TEMPERATURE_EVENT", creationDateTime.time
< $creation.getTime(), sensorUUID == $uuid) from entry-point "event")
$sensor: EnvironmentalSensor(sensorUUID == $event.sensorUUID,
$sensor.type.keyId == "TEMP_ENV_TYPE", $sensor.assessable == true)
$temperature1: Number( floatValue >=
Float.valueOf($sensor.getPropertyValue("min")) ) from $event.measure
$temperature2: Number( floatValue <=
Float.valueOf($sensor.getPropertyValue("max")) ) from $event.measure
$sensorInAlarm: SensorInAlarm (sensorUUID == $uuid)
then
ConcurrentHashMap<String, String> statusInfo =
sensorCache.get($sensor.getId().toString());
SimpleDateFormat formatter = new
SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
long sensorId = $sensor.getId();
Date alarmTimestamp = $event.getCreationDateTime();
String measure = $event.getMeasure() + "";
String alarmType = "TEMPERATURE_OK";
statusInfo.put("eventMeasure", measure);
statusInfo.put("eventTimestamp",
formatter.format(alarmTimestamp));
$sensorInAlarm.setEventTimestamp(alarmTimestamp);
$sensorInAlarm.setEventMeasure(measure);
update($sensorInAlarm);
sensorCache.update($sensor.getId().toString(),
statusInfo);
RuleEngineLogger.log(RuleEngineLoggerLevel.INFO,
"normale");
retract($event);
end
The exception does not immediately occur sometimes it takes days
before occurs
Rule is fire when event TEMPERATURE_EVENT occurs. TEMPERATURE_EVENT is a
measure from a thermometer, i have a dispather that simultaneously
sends 10 measures (coming from 10 different sensors), then dispatcher
stops sending data for few minutes then it sends again new 10 measures,
an so on.
Same situation for me: When the exception is thrown, it looks like that
the event is not removed from the knowledge base (I watch the number of
events in the knowledge base -- fact count)
I more than 10 rules, fired every 1s
Any help would be appreciated
Sara
--
Eximia Srl <http://www.eximia.it>
Sara Didaci
Application Engineer
Eximia S.r.l.
Via Sassari, 3
09123 Cagliari - Italy
Tel +39 070 7966776
Fax +39 070 680904
Mob +39 328 4660322
Email sara.didaci at eximia.it <mailto:sara.didaci at eximia.it>
Web www.eximia.it <http://www.eximia.it>
Eximia è un'azienda certificata ISO 9001
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