Re: [rules-users] NPE in Drools JPA Persistence with rules that use Flow

It is actually null. I dont pass any config in when constructing the session. On May 26, 2011, at 11:13 AM, Mauricio Salatino wrote: Can you share the ksession configuration? 2011/5/26 Shannon Hastings <shannon.hastings(a)inventrio.com&gt; > My session is persistent, i can query the sessioninfo in the DB and see > the data. My beans are searializable and I can see that the fact has been > deserialized. > > > On May 26, 2011, at 11:05 AM, Mauricio Salatino wrote: > > Ok, assuming that your session is persistent, are your POJOs > serializables? > Cheers > > 2011/5/26 Shannon Hastings <shannon.hastings(a)inventrio.com&gt; > >> Nope, no change, i am pulling the same drl from guvnor every time. It >> only has three rules as show below in the thread. I can restore the session >> without error so long as the session does not have any facts in it. Once I >> drop a fact in and store, then i cannot restore. >> >> >> On May 26, 2011, at 10:55 AM, Mauricio Salatino wrote: >> >> Ok, so did you check that you didn't change anything from the moment you >> store the ksession and the moment when you restore it? >> I usually find this problem when you change a rule and try to restore the >> session using the new version of the rule or when you change a business >> process definition or the session state from different threads. Can you >> check that please? >> You will find this unmarshalling problems and it will be very difficult >> to debug at that level, when the problem is being caused by some >> modification on your code. Greetings >> >> 2011/5/26 Shannon Hastings <shannon.hastings(a)inventrio.com&gt; >> >>> I have debugged into this and found this issue. The NPE comes when the >>> session unmarsheller runs into a node that does not have a sink or the sink >>> is null. In the debugger i can see the fact and the fact looks right, has >>> all the data from the pojo i sent in. However, it does not have a sink, but >>> it does have a node id. This looks like a bug that was reportedly fixed >>> before in 5.1. I dont know enough about the storing of the facts in the >>> working memory or the model that is being used under the hood, however, all >>> i have to do to create the problem is create a session, send an object to >>> it, and then try to restore it. And the objects i am sending to it are >>> simple pojo's and in the debugger I can see that it was able to read them >>> back out just fine. Below is an exerpt from the "InputMarshaller" class. >>> In the debugger The readlefttuples operation shows the nodeId = 12 and the >>> sink = null and the facthandleId = 1. he it calls readLeftTuple() and the >>> obvious NPE will be thrown because the ParentLeftTuple has a null sink and >>> when you call "sink.getType()" you get the NPE. Is this a known bug. >>> >>> public static void readLeftTuples(MarshallerReaderContext context) >>> throws IOException, >>> >>> ClassNotFoundException { >>> ObjectInputStream stream = context.stream; >>> >>> while ( stream.readShort() == PersisterEnums.LEFT_TUPLE ) { >>> int nodeId = stream.readInt(); >>> LeftTupleSink sink = (LeftTupleSink) context.sinks.get( >>> nodeId ); >>> int factHandleId = stream.readInt(); >>> LeftTuple leftTuple = new LeftTuple( context.handles.get( >>> factHandleId ), >>> sink, >>> true ); >>> readLeftTuple( leftTuple, >>> context ); >>> } >>> } >>> >>> public static void readLeftTuple(LeftTuple parentLeftTuple, >>> MarshallerReaderContext context) >>> throws IOException, >>> >>> ClassNotFoundException { >>> ObjectInputStream stream = context.stream; >>> Map<Integer, BaseNode> sinks = context.sinks; >>> >>> LeftTupleSink sink = parentLeftTuple.getLeftTupleSink(); >>> >>> switch ( sink.getType() ) { >>> >>> >>> On May 24, 2011, at 9:06 AM, Edson Tirelli wrote: >>> >>> >>> Shannon, >>> >>> What is the following method doing? >>> >>> engine.process(reading); >>> >>> Can you please open a JIRA and attach your test case or point me to >>> the jira reporting this problem if it exists already? >>> >>> Thanks, >>> Edson >>> >>> >>> 2011/5/23 Shannon Hastings <shannon.hastings(a)inventrio.com&gt; >>> >>>> I am using drools 5.2.0.M2 and I still get this error: >>>> >>>> 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 >>>> $eventA : Reading(readingType.name == "BPMETER") >>>> $systolic : Value( this.valueType.name == "SYSTOLIC" ) from$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 >>>> $eventC : Reading(readingType.name == "WEIGHT" ) >>>> $eventB : Reading( readingType.name == "WEIGHT" , this after[5s, 1m] >>>> $eventC ) >>>> $eventA : Reading( readingType.name == "WEIGHT" , this after[5s, 1m] >>>> $eventB ) >>>> $weight3 : Value( this.valueType.name == "WEIGHT" ) from$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 >>>> $eventC : Reading(readingType.name == "WEIGHT" ) >>>> $eventB : Reading( readingType.name == "WEIGHT" , this after[5s, 1m] >>>> $eventC ) >>>> $eventA : Reading( readingType.name == "WEIGHT" , this after[5s, 1m] >>>> $eventB ) >>>> $weight3 : Value( this.valueType.name == "WEIGHT" ) from$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(); >>>> } >>>> } >>>> >>>> Shannon Hastings >>>> >>>> Inventrio >>>> 545 Metro Place South, Suite 475 >>>> Dublin, OH 43017 >>>> *Phone*: (614) 389-2795 x101 >>>> *Fax:* (614) 522-6249 >>>> *Email:* shannon.hastings(a)inventrio.com >>>> http://www.inventrio.com >>>> >>>> >>>> _______________________________________________ >>>> rules-users mailing list >>>> rules-users(a)lists.jboss.org >>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>> >>>> >>> >>> >>> -- >>> Edson Tirelli >>> JBoss Drools Core Development >>> JBoss by Red Hat @ www.jboss.com >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >>> Shannon Hastings >>> >>> Inventrio >>> 545 Metro Place South, Suite 475 >>> Dublin, OH 43017 >>> *Phone*: (614) 389-2795 x101 >>> *Fax:* (614) 522-6249 >>> *Email:* shannon.hastings(a)inventrio.com >>> http://www.inventrio.com >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >> >> >> -- >> - CTO @ http://www.plugtree.com >> - MyJourney @ http://salaboy.wordpress.com >> - Co-Founder @ http://www.jbug.com.ar >> >> - Salatino "Salaboy" Mauricio - >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> Shannon Hastings >> >> Inventrio >> 545 Metro Place South, Suite 475 >> Dublin, OH 43017 >> *Phone*: (614) 389-2795 x101 >> *Fax:* (614) 522-6249 >> *Email:* shannon.hastings(a)inventrio.com >> http://www.inventrio.com >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > > -- > - CTO @ http://www.plugtree.com > - MyJourney @ http://salaboy.wordpress.com > - Co-Founder @ http://www.jbug.com.ar > > - Salatino "Salaboy" Mauricio - > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > > Shannon Hastings > > Inventrio > 545 Metro Place South, Suite 475 > Dublin, OH 43017 > *Phone*: (614) 389-2795 x101 > *Fax:* (614) 522-6249 > *Email:* shannon.hastings(a)inventrio.com > http://www.inventrio.com > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- - CTO @ http://www.plugtree.com - MyJourney @ http://salaboy.wordpress.com - Co-Founder @ http://www.jbug.com.ar - Salatino "Salaboy" Mauricio - _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users Shannon Hastings Inventrio 545 Metro Place South, Suite 475 Dublin, OH 43017 *Phone*: (614) 389-2795 x101 *Fax:* (614) 522-6249 *Email:* shannon.hastings(a)inventrio.com http://www.inventrio.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users