Error in the USER TASK work handler
by ramram
Hi all
I have a problem with the User Task work Item when I have an in and out
parameters. I am using a simple scenario just to reproduce the Error and
exception and the scenario is:
Start -> user task with parameter (in, out) -> End
I am having the following exception once I execute the Task:
ERROR [STDERR] java.lang.NullPointerException
ERROR [STDERR] at
org.drools.marshalling.impl.MarshallerReaderContext.resolveClass(MarshallerReaderContext.java:78)
ERROR [STDERR] at java.io.ObjectInputStream.readNonProxyDesc(Unknown
Source)
ERROR [STDERR] at java.io.ObjectInputStream.readClassDesc(Unknown
Source)
ERROR [STDERR] at java.io.ObjectInputStream.readOrdinaryObject(Unknown
Source)
ERROR [STDERR] at java.io.ObjectInputStream.readObject0(Unknown Source)
ERROR [STDERR] at java.io.ObjectInputStream.readObject(Unknown Source)
ERROR [STDERR] at
org.drools.marshalling.impl.InputMarshaller.readWorkItem(InputMarshaller.java:829)
ERROR [STDERR] at
org.drools.persistence.processinstance.WorkItemInfo.getWorkItem(WorkItemInfo.java:86)
ERROR [STDERR] at
org.drools.persistence.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:90)
ERROR [STDERR] at
org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:46)
ERROR [STDERR] at
org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:12)
ERROR [STDERR] at
org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:254)
ERROR [STDERR] at
org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.completeWorkItem(CommandBasedStatefulKnowledgeSession.java:118
ERROR [STDERR] at
org.drools.process.workitem.wsht.CommandBasedWSHumanTaskHandler$GetResultContentResponseHandler.execute(CommandBasedWSHumanTa
va:297)
ERROR [STDERR] at
org.drools.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:139)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:752)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832)
ERROR [STDERR] at
org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:379)
ERROR [STDERR] at
org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:173)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain$HeadFilter.messageReceived(DefaultIoFilterChain.java:616)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
ERROR [STDERR] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:408)
ERROR [STDERR] at
org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:578)
ERROR [STDERR] at
org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:540)
ERROR [STDERR] at
org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:532)
ERROR [STDERR] at
org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:58)
ERROR [STDERR] at
org.apache.mina.core.polling.AbstractPollingIoProcessor$Worker.run(AbstractPollingIoProcessor.java:857)
ERROR [STDERR] at
org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
ERROR [STDERR] at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
ERROR [STDERR] at
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
ERROR [STDERR] at java.lang.Thread.run(Unknown Source)
INFO [STDOUT] [2009:12:337 09:12:671:exception] Uncaught exception on
client
INFO [STDOUT] java.lang.RuntimeException: Could not rollback transaction
INFO [STDOUT] at
org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:283)
INFO [STDOUT] at
org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.completeWorkItem(CommandBasedStatefulKnowledgeSession.java:118
INFO [STDOUT] at
org.drools.process.workitem.wsht.CommandBasedWSHumanTaskHandler$GetResultContentResponseHandler.execute(CommandBasedWSHumanTa
va:297)
INFO [STDOUT] at
org.drools.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:139)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:752)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832)
INFO [STDOUT] at
org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:379)
INFO [STDOUT] at
org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:173)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain$HeadFilter.messageReceived(DefaultIoFilterChain.java:616)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414)
INFO [STDOUT] at
org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:408)
INFO [STDOUT] at
org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:578)
INFO [STDOUT] at
org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:540)
INFO [STDOUT] at
org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:532)
INFO [STDOUT] at
org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:58)
INFO [STDOUT] at
org.apache.mina.core.polling.AbstractPollingIoProcessor$Worker.run(AbstractPollingIoProcessor.java:857)
INFO [STDOUT] at
org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
INFO [STDOUT] at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
INFO [STDOUT] at
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
INFO [STDOUT] at java.lang.Thread.run(Unknown Source)
INFO [STDOUT] Caused by: java.lang.RuntimeException: Could not execute
command
INFO [STDOUT] at
org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:280)
INFO [STDOUT] ... 24 more
INFO [STDOUT] Caused by: java.lang.NullPointerException
INFO [STDOUT] at
org.drools.marshalling.impl.MarshallerReaderContext.resolveClass(MarshallerReaderContext.java:78)
INFO [STDOUT] at java.io.ObjectInputStream.readNonProxyDesc(Unknown
Source)
INFO [STDOUT] at java.io.ObjectInputStream.readClassDesc(Unknown
Source)
INFO [STDOUT] at java.io.ObjectInputStream.readOrdinaryObject(Unknown
Source)
INFO [STDOUT] at java.io.ObjectInputStream.readObject0(Unknown Source)
INFO [STDOUT] at java.io.ObjectInputStream.readObject(Unknown Source)
INFO [STDOUT] at
org.drools.marshalling.impl.InputMarshaller.readWorkItem(InputMarshaller.java:829)
INFO [STDOUT] at
org.drools.persistence.processinstance.WorkItemInfo.getWorkItem(WorkItemInfo.java:86)
INFO [STDOUT] at
org.drools.persistence.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:90)
INFO [STDOUT] at
org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:46)
INFO [STDOUT] at
org.drools.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:12)
INFO [STDOUT] at
org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:254)
INFO [STDOUT] ... 24 more
Regards
Ram
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16 years
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by chris richmond
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prevented me from asking questions in the forumn, so I am testing from
another email.
Thanks,
Chris
16 years
MVEL wows: what does "importInjectionRequired" mean?
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I'm at my wits end. I have two simple rules in two separate packages, they
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rule1:
import somepackage.*
global somepackage.Foo foo
...
then
foo.doSomething(...)
end
rule2:
import otherpackage.*
global otherpackage.Gar gar
...
then
gar.doSomething(...)
end
When mvel is resolving foo for rule1 it does so via
org.mvel2.compiler.CompiledExpression#getValue:line-104
When resolving gar for rule2 it does so via
org.mvel2.compiler.CompiledExpression#getValue:line-107
The difference is that for rule1 the variable 'importInjectionRequired' is
true, which results in 'foo' being resolved, but for rule2 this variable is
false which results in 'gar' not being resolved.
I suspecting that its important that the packages and the global instances
are added dynamically *after* the session is created (in scala'ish dialect):
val session = createSessionUsingNoPackages
val kbuilder1 = KnowledgeBuilderFactory.newKnowledgeBuilder
kbuilder1.add("rule1.drl", ResourceType.DRL)
session.knowledgeBase addKnowledgePackages (kbuilder1.getKnowledgePackages)
session addGlobal ("foo", foo)
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kbuilder2.add("rule2.drl", ResourceType.DRL)
session.knowledgeBase addKnowledgePackages (kbuilder2.getKnowledgePackages)
session addGlobal ("Gar", gar)
If just one or the other packages are added the session, then either
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resolved. It does not matter what order they added to the session. I can
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I guess I really don't expect any help on this, but I will boil it down to a
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-barry
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16 years
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by Shah, Malay
Hi All,
I have the following drool rule that has "or not" under Entity Block. Basically, the rule tries to check if there either exists an entity object EtsExecutionOrderXref_core00 with the given conditions, or the entity does not exist at all with some other conditions.
dialect "mvel"
rule "Legacy ETSDB Rule"
when
EtsExecutionOrderHist_core0:EtsExecutionOrderHist_core(customerOrFirm != "0")
EtsExecutionOrderXref_core00:
(
EtsExecutionOrderXref_core
(
entityOID == EtsExecutionOrderHist_core0.entityOID , entityRID == EtsExecutionOrderHist_core0.entityRID , entityVID == EtsExecutionOrderHist_core0.entityVID , referenceID != "2" && referenceIDType == "orderSubCapacity"
)
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(
entityOID == EtsExecutionOrderHist_core0.entityOID , entityRID == EtsExecutionOrderHist_core0.entityRID , entityVID == EtsExecutionOrderHist_core0.entityVID , referenceIDType == "orderSubCapacity"
))
)
then
end
But, while compiling the rule, I am getting the following errors:
org.drools.compiler.DroolsParserException: [ERR 101] Line 22:16 no viable alternative at input 'entityOID' in rule "Legacy ETSDB Rule" in pattern not,
org.drools.compiler.DroolsParserException: [ERR 102] Line 22:68 mismatched input ',' expecting '(' in rule "Legacy ETSDB Rule" in pattern EtsExecutionOrderHist_core0.entityOID,
org.drools.compiler.DroolsParserException: [ERR 102] Line 22:122 mismatched input ',' expecting '(' in rule "Legacy ETSDB Rule" in pattern EtsExecutionOrderHist_core0.entityOID in pattern EtsExecutionOrderHist_core0.entityRID,
org.drools.compiler.DroolsParserException: [ERR 102] Line 22:176 mismatched input ',' expecting '(' in rule "Legacy ETSDB Rule" in pattern EtsExecutionOrderHist_core0.entityOID in pattern EtsExecutionOrderHist_core0.entityRID in pattern EtsExecutionOrderHist_core0.entityVID]
I think the rule is correct, but am not able to figure out these compilation errors. Could anybody please comment on why this would happen?
Thanks
Malay Shah
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16 years
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by Asif Iqbal
Hi,
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regards
16 years
report
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16 years
How to store the rules data into RDBMS, like mysql, oracle
by Sinboy Zhang
Hi,all:
Guvnor is a BRMS,it can manage the rules through Jackrabbit
Repository.The default,Guvnor work well with derby database.But i want it
work with my database,just like MySQL.
My step is :
1.Run Guvnor with default,and generate the repository.xml and repository
dictionary at JBOSS_HOME\bin dictionary
2.delete repository dictionary and edit repository.xml,only replace the
content in <PersistenceManage> label ,just like this:
<PersistenceManager
class="org.apache.jackrabbit.core.state.db.SimpleDbPersistenceManager">
<param name="driver" value="com.mysql.jdbc.Driver"/>
<param name="url" value="jdbc:mysql://localhost:3306/guvnor_db"/>
<param name="user" value="root" />
<param name="password" value="a123456" />
<param name="schema" value="mysql"/>
<param name="schemaObjectPrefix" value="${wsp.name}_"/>
<param name="externalBLOBs" value="false"/>
</PersistenceManager>
3.install Mysql database,and create the guvnor_db database instance,and
copy mysql driver to JBOSS_HOME\server\deploy\lib
4.Restart the JBoss ,i get the exception:
org.drools.repository.RulesRepositoryException:
javax.jcr.RepositoryException: Invalid repository configuration:
repository.xml: Replacement not found for ${wsp.name}.: Replacement not
found for ${wsp.name}.
Why?Please help me,thanks!
16 years
