[rules-users] rules-users Digest, Vol 45, Issue 121
Burak Aydin
burak.aydin at obss.com.tr
Thu Aug 26 09:10:02 EDT 2010
KnowledgeBaseImpl also seems to be unsafe because threads get stuck while
trying to open a new StatefulKnowledgeSession
org.drools.impl.KnowledgeBaseImpl.newStatefulKnowledgeSession()
On Thu, Aug 26, 2010 at 3:49 PM, <rules-users-request at lists.jboss.org>wrote:
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> Today's Topics:
>
> 1. CommandFactory.newSetGlobal and scope (Ricardo J. M?ndez)
> 2. Re: Stuck Threads (Esteban Aliverti)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 26 Aug 2010 15:30:47 +0300
> From: Ricardo J. M?ndez <mendezster at gmail.com>
> Subject: [rules-users] CommandFactory.newSetGlobal and scope
> To: rules-users at lists.jboss.org
> Message-ID:
> <AANLkTimLN6duK+SMeRuv6ZVUtEhk4B+sdYYBxkfXozLu at mail.gmail.com<AANLkTimLN6duK%2BSMeRuv6ZVUtEhk4B%2BsdYYBxkfXozLu at mail.gmail.com>
> >
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi everyone,
>
> I'm reading through Michael Bali's Drools JBoss Rules book as well as the
> reference guide, and I've got a question of scope about
> StatefulKnowledgeSessions.
>
> I understand that if I call setGlobal on a stateful session, this global
> value will be shared for all simultaneous calls to executeRules across all
> threads. I'm looking into CommandFactory, which has a newSetGlobal
> method. From what I gather, a global set via CommandFactory.newSetGlobal
> and then executed with a call to
> execute(CommandFactory.newBatchExecution(cmds)) would be scoped solely to
> that execution, regardless of it is a StatefulKnowledgeSession and there
> are
> other parallel command executions against the same session.
>
> Can anyone confirm if that is accurate?
>
> Thanks in advance,
>
> --
> Ricardo J. M?ndez
> http://www.arquetipos.co.cr/
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> ------------------------------
>
> Message: 2
> Date: Thu, 26 Aug 2010 09:48:19 -0300
> From: Esteban Aliverti <esteban.aliverti at gmail.com>
> Subject: Re: [rules-users] Stuck Threads
> To: Rules Users List <rules-users at lists.jboss.org>
> Message-ID:
> <AANLkTi=-nMM4pkKFbxTa_WWRqpPsFi9QbGN8iY_fSsxC at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> StatefulSessions are not thread safe.
>
> El ago 26, 2010 9:23 a.m., "Burak Aydin" <burak.aydin at obss.com.tr>
> escribi?:
>
> Hello,
>
> While trying to open stateful session in a 32 core machine and 35 threads,
> all of the threads hangs. Below is the stack trace. ChainedProperties class
> seems to be thread-unsafe??
>
> gridgain-#13%null%" - Thread t at 64
>
> java.lang.Thread.State: RUNNABLE
>
> at
> sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:806)
>
> at
> sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:765)
>
> at
> sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:735)
>
> at sun.misc.URLClassPath$1.next(URLClassPath.java:196)
>
> at sun.misc.URLClassPath$1.hasMoreElements(URLClassPath.java:206)
>
> at java.net.URLClassLoader$3$1.run(URLClassLoader.java:416)
>
> at java.security.AccessController.doPrivileged(Native Method)
>
> at java.net.URLClassLoader$3.next(URLClassLoader.java:413)
>
> at
> java.net.URLClassLoader$3.hasMoreElements(URLClassLoader.java:438)
>
> at sun.misc.CompoundEnumeration.next(CompoundEnumeration.java:27)
>
> at
> sun.misc.CompoundEnumeration.hasMoreElements(CompoundEnumeration.java:36)
>
> at sun.misc.CompoundEnumeration.next(CompoundEnumeration.java:27)
>
> at
> sun.misc.CompoundEnumeration.hasMoreElements(CompoundEnumeration.java:36)
>
> at sun.misc.CompoundEnumeration.next(CompoundEnumeration.java:27)
>
> at
> sun.misc.CompoundEnumeration.hasMoreElements(CompoundEnumeration.java:36)
>
> at
>
> org.drools.util.ChainedProperties.loadProperties(ChainedProperties.java:232)
>
> at org.drools.util.ChainedProperties.(ChainedProperties.java:112)
>
> at org.drools.util.ChainedProperties.(ChainedProperties.java:41)
>
> at org.drools.util.ChainedProperties.(ChainedProperties.java:35)
>
> at
> org.drools.SessionConfiguration.init(SessionConfiguration.java:131)
>
> at org.drools.SessionConfiguration.(SessionConfiguration.java:112)
>
> at
>
> org.drools.impl.KnowledgeBaseImpl.newStatefulKnowledgeSession(KnowledgeBaseImpl.java:134)
>
> at texan.qset.service.QsetService.executeQset(QsetService.java:72)
>
> at texan.qset.service.QsetService.executeQset(QsetService.java:34)
>
> at
>
> texan.crop.service.ProductPostingService.processQSet(ProductPostingService.java:600)
>
> at
>
> texan.crop.service.ProductPostingService.processQSets(ProductPostingService.java:582)
>
> at
>
> texan.crop.service.ProductPostingService.createOrUpdateProduct(ProductPostingService.java:562)
>
> at
>
> texan.crop.service.ProductPostingService.postingProcess(ProductPostingService.java:181)
>
> at
>
> texan.crop.service.ProductPostingService.productPostingProcess_aroundBody0(ProductPostingService.java:85)
>
> at
>
> texan.crop.service.ProductPostingService$AjcClosure1.run(ProductPostingService.java:1)
>
> at org.aspectj.runtime.reflect.JoinPointImpl.proceed(Unknown Source)
>
> at
>
> falez.runtime.aop.FalezTransactionalAspect$4.proceed(FalezTransactionalAspect.java:176)
>
> at
>
> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
>
> at
>
> falez.runtime.aop.FalezTransactionalAspect.advice(FalezTransactionalAspect.java:215)
>
> at
>
> falez.runtime.aop.TexanTransactionalAspect.ajc$inlineAccessMethod$falez_runtime_aop_TexanTransactionalAspect$falez_runtime_aop_FalezTransactionalAspect$advice(TexanTransactionalAspect.java:1)
>
> at
>
> falez.runtime.aop.TexanTransactionalAspect.around(TexanTransactionalAspect.java:26)
>
> at
>
> texan.crop.service.ProductPostingService.productPostingProcess(ProductPostingService.java:80)
>
> at
>
> texan.crop.batch.grid.ProductPostingBatch.doCifProcess(ProductPostingBatch.java:45)
>
> - locked texan.crop.batch.grid.ProductPostingBatch@@10880
>
> at
>
> texan.crop.batch.grid.ProductPostingBatch.doProcess(ProductPostingBatch.java:37)
>
> at
>
> falez.runtime.batch.AbstractBatchOperation.doProcess(AbstractBatchOperation.java:209)
>
> at
>
> texan.crop.batch.grid.ProductPostingBatch.doProcess_aroundBody0(ProductPostingBatch.java:29)
>
> at
>
> texan.crop.batch.grid.ProductPostingBatch$AjcClosure1.run(ProductPostingBatch.java:1)
>
> at org.aspectj.runtime.reflect.JoinPointImpl.proceed(Unknown Source)
>
> at
>
> falez.runtime.aop.FalezTransactionalAspect$4.proceed(FalezTransactionalAspect.java:176)
>
> at
>
> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
>
> at
>
> falez.runtime.aop.FalezTransactionalAspect.advice(FalezTransactionalAspect.java:215)
>
> at
>
> falez.runtime.aop.TexanTransactionalAspect.ajc$inlineAccessMethod$falez_runtime_aop_TexanTransactionalAspect$falez_runtime_aop_FalezTransactionalAspect$advice(TexanTransactionalAspect.java:1)
>
> at
>
> falez.runtime.aop.TexanTransactionalAspect.around(TexanTransactionalAspect.java:26)
>
> at
>
> texan.crop.batch.grid.ProductPostingBatch.doProcess(ProductPostingBatch.java:28)
>
> at
>
> falez.runtime.batch.AbstractBatchOperation.process(AbstractBatchOperation.java:76)
>
> at
>
> falez.runtime.batch.BatchProcessingTask$BatchProcessingJob.doExecute(BatchProcessingTask.java:89)
>
> at
>
> falez.runtime.batch.BatchProcessingTask$BatchProcessingJob.execute(BatchProcessingTask.java:76)
>
> at
>
> falez.runtime.batch.BatchProcessingTask$BatchProcessingJob.execute(BatchProcessingTask.java:1)
>
> at
>
> org.gridgain.grid.kernal.processors.job.GridJobWorker.body(GridJobWorker.java:406)
>
> at
> org.gridgain.grid.util.runnable.GridRunnable$1.run(GridRunnable.java:142)
>
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
>
> at
> java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
>
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
>
> at
> org.gridgain.grid.util.runnable.GridRunnable.run(GridRunnable.java:194)
>
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>
> at java.lang.Thread.run(Thread.java:619)
>
> --
> Burak AYDIN
> Senior Software Engineer
> OBSS
> -------------------------------------
> 9433 @YKB
>
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> End of rules-users Digest, Vol 45, Issue 121
> ********************************************
>
--
Burak AYDIN
Senior Software Engineer
OBSS
-------------------------------------
9433 @YKB
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