Caused by: java.lang.NullPointerException
at org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:469)
Which was reported on drools 5.1.0 JIRA and claimed to be fixed. I see the error when trying to load a session that was persisted that had objects inserted that are time depended and cause rules to fire that use terms from flow such as "after". I only see this error if create a new session, submit some facts to it, close it, and then try to reload. If i do not submit any facts to it I do not get the error. I.E. If all i do is create the KB with my rules I can reload a session from the DB no problem, but if i submit some facts and persist the session, then i cannot reload it. This seems to be an issue with the JPA loading of the session that has facts in it that use Flow (JBPM). Any help would be greatly appreciated. Below are my simple rules followed by the test code used to submit the facts:
package com.inventrio.rules.readings
import com.inventrio.healthmonitoring.model.*;
declare Reading
@role(event)
@timestamp(readingTime)
end
rule "High Blood Pressure"
when
$systolic : Value( this.valueType.name == "SYSTOLIC" ) from $eventA.values
$diastolic : Value( this.valueType.name == "DIASTOLIC" ) from $eventA.values
eval( $systolic.getLongValue() > 180 && $diastolic.getLongValue() > 120 )
then
System.out.println("HIGH BLOOD PRESSURE" );
end
rule "Weight Trending Up"
when
$weight3 : Value( this.valueType.name == "WEIGHT" ) from $eventC.values
$weight2 : Value( this.valueType.name == "WEIGHT" ) from $eventB.values
$weight1 : Value( this.valueType.name == "WEIGHT" ) from $eventA.values
eval( $weight3.getDoubleValue().doubleValue() < $weight2.getDoubleValue().doubleValue() + 1.0 && $weight2.getDoubleValue().doubleValue() < $weight1.getDoubleValue().doubleValue() + 1.0 )
then
System.out.println("WEIGHT IS GOING UP" );
end
rule "Weight Trending Down"
when
$weight3 : Value( this.valueType.name == "WEIGHT" ) from $eventC.values
$weight2 : Value( this.valueType.name == "WEIGHT" ) from $eventB.values
$weight1 : Value( this.valueType.name == "WEIGHT" ) from $eventA.values
eval( $weight3.getDoubleValue().doubleValue() > $weight2.getDoubleValue().doubleValue() + 1.0 && $weight2.getDoubleValue().doubleValue() > $weight1.getDoubleValue().doubleValue() + 1.0 )
then
System.out.println("WEIGHT IS GOING DOWN" );
end
And next is my object i insert before closeing and then trying to reload the session.
public void testWeightRules() {
try {
Reading reading = new Reading();
reading.setReadingTime(new Date(System.currentTimeMillis()));
ReadingType type = new ReadingType();
type.setName("WEIGHT");
type.setDescription("");
reading.setReadingType(type);
Value value = new Value();
value.setDoubleValue(140.0);
ValueType valueType = new ValueType();
valueType.setName("WEIGHT");
valueType.setDataType(ValueDataType.DOUBLE);
value.setValueType(valueType);
reading.getValues().add(value);
reading.setReadingType(type);
engine.process(reading);
Thread.sleep(7000);
reading = new Reading();
reading.setReadingTime(new Date(System.currentTimeMillis()));
type = new ReadingType();
type.setName("WEIGHT");
type.setDescription("");
reading.setReadingType(type);
value = new Value();
value.setDoubleValue(142.0);
valueType = new ValueType();
valueType.setName("WEIGHT");
valueType.setDataType(ValueDataType.DOUBLE);
value.setValueType(valueType);
reading.getValues().add(value);
reading.setReadingType(type);
engine.process(reading);
Thread.sleep(7000);
reading = new Reading();
reading.setReadingTime(new Date(System.currentTimeMillis()));
type = new ReadingType();
type.setName("WEIGHT");
type.setDescription("");
reading.setReadingType(type);
value = new Value();
value.setDoubleValue(144.0);
valueType = new ValueType();
valueType.setName("WEIGHT");
valueType.setDataType(ValueDataType.DOUBLE);
value.setValueType(valueType);
reading.getValues().add(value);
reading.setReadingType(type);
engine.process(reading);
} catch (Throwable t) {
t.printStackTrace();
}
}