[Performance Tuning] - performance issues - inconsistent results for multiple concurrent users
by jainee
jainee [https://community.jboss.org/people/jainee] created the discussion
"performance issues - inconsistent results for multiple concurrent users"
To view the discussion, visit: https://community.jboss.org/message/832229#832229
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We are deploying or web application on Jboss EAP 5.2. The web application receives a webservice call to process requests.
The two instances of production profile is deployed on two different boxes and request is distributed using a http server. The two boxes are 2 core machines.
We have tried to tune the jboss profile as described on various results on forum - thread group, memory settings, and other JAVA_OPT parameters.
We get very consistent results and bechmarked results while running the tests with 16 simultaneous users.
If we increase the number of users to 20 (10 for each box) - we get inconsistent results for multiple runs. We response time just doubles up and there is no consistent pattern on the same.
I believe if multiple users are not supported by application server or box level settings - we would get bad performance but atleast consistent results.
Is there any recommendations on the performance settings to get the best results when multiple users are invoking the webservice simultaneously?
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[jBPM] - [JBPM 5.4] - Transaction / Concurrency problem
by Guilherme Telles
Guilherme Telles [https://community.jboss.org/people/guilherme.telles] created the discussion
"[JBPM 5.4] - Transaction / Concurrency problem"
To view the discussion, visit: https://community.jboss.org/message/832169#832169
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Hi, I'm having some trouble with concurrency, hope you guys can help me
Here's the stack trace:
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15:32:16,379 ERROR [org.drools.persistence.SingleSessionCommandService] (Thread-79) Could not commit session: java.lang.RuntimeException: Unable to commit transaction
at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:182) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]
at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:376) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]
at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.completeWorkItem(CommandBasedStatefulKnowledgeSession.java:150) [drools-core-5.5.0.Final.jar:5.5.0.Final]
at org.jbpm.process.workitem.wsht.AsyncGenericHTWorkItemHandler$GetResultContentResponseHandler.execute(AsyncGenericHTWorkItemHandler.java:302) [jbpm-human-task-core-5.4.0.Final.jar:5.4.0.Final]
at org.jbpm.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:153) [jbpm-human-task-core-5.4.0.Final.jar:5.4.0.Final]
at org.jbpm.task.service.hornetq.HornetQTaskClientHandler.messageReceived(HornetQTaskClientHandler.java:56) [jbpm-human-task-hornetq-5.4.0.Final.jar:5.4.0.Final]
at org.jbpm.task.service.hornetq.HornetQTaskClientConnector$1.run(HornetQTaskClientConnector.java:122) [jbpm-human-task-hornetq-5.4.0.Final.jar:5.4.0.Final]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_21]
Caused by: javax.transaction.RollbackException: ARJUNA016053: Could not commit transaction.
at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1177)
at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:117)
at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75)
at org.jboss.tm.usertx.client.ServerVMClientUserTransaction.commit(ServerVMClientUserTransaction.java:167)
at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:179) [drools-persistence-jpa-5.5.0.Final.jar:5.5.0.Final]
... 7 more
Caused by: javax.persistence.OptimisticLockException: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.jbpm.persistence.processinstance.ProcessInstanceInfo#1]
at org.hibernate.ejb.AbstractEntityManagerImpl.wrapStaleStateException(AbstractEntityManagerImpl.java:1389) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1307) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1288) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1294) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl$CallbackExceptionMapperImpl.mapManagedFlushFailure(AbstractEntityManagerImpl.java:1480) [hibernate-entitymanager-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.beforeCompletion(SynchronizationCallbackCoordinatorImpl.java:109) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization.beforeCompletion(RegisteredSynchronization.java:53) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:76)
at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:273)
at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:93)
at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:164)
at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1165)
... 11 more
Caused by: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.jbpm.persistence.processinstance.ProcessInstanceInfo#1]
at org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEntityPersister.java:2365) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3017) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2915) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3244) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:113) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:354) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:276) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:326) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1127) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:325) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.beforeCompletion(SynchronizationCallbackCoordinatorImpl.java:104) [hibernate-core-4.1.0.Final.jar:4.1.0.Final]
... 17 more
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I'm using JBPM 5.4, Jboss AS 7.1.1, Spring 3
The Knowledge Base it's been kept in another server.
This is how I start my HornetQTaskServer:
(Do I really need to start it? I've been trying to connect to the one that's supposed to come with jBPM. But, in that case, even though I can start the process, not a single task is persisted. I can only complete the process if I set the AsyncHornetQHTWorkItemHandler IP to localhost and start the HornetQ locally )
{code}
try{
TaskService taskService = new TaskService(getEntityManagerFactoryJbpm(), SystemEventListenerFactory.getSystemEventListener());
HornetQTaskServer server = new HornetQTaskServer(taskService, "localhost", 5445);
if(!server.isRunning()) {
Thread thread = new Thread(server);
thread.start();
}
} catch(Exception e) {
LOGGER.warn("HornetQ Task Server já iniciado");
}
{code}
My Environment:
{code}
public Environment getEnvironment() {
if(environment == null) {
LOGGER.info("CREATING NEW ENVIRONMENT");
environment = KnowledgeBaseFactory.newEnvironment();
environment.set(EnvironmentName.ENTITY_MANAGER_FACTORY, getEntityManagerFactoryJbpm());
}
return environment;
}
{code}
How I register my handlers:
{code}
public static void registerHandlers(StatefulKnowledgeSession kSession) {
LOGGER.info("REGISTERING HANDLERS...");
final EmailHandler emailHandler = new EmailHandler();
final OrcamentoHandler orcamentoHandler = new OrcamentoHandler();
final MudarStatusHandler mudarStatusHandler = new MudarStatusHandler();
kSession.getWorkItemManager().registerWorkItemHandler("notificacao_lider", emailHandler);
kSession.getWorkItemManager().registerWorkItemHandler("notificacao_negocio", emailHandler);
kSession.getWorkItemManager().registerWorkItemHandler("notificacao_responsavel", emailHandler);
kSession.getWorkItemManager().registerWorkItemHandler("modulo_orcamento", orcamentoHandler);
kSession.getWorkItemManager().registerWorkItemHandler("muda_status", mudarStatusHandler);
TaskClient client = new TaskClient(new HornetQTaskClientConnector(UUID.randomUUID().toString(), new HornetQTaskClientHandler(SystemEventListenerFactory.getSystemEventListener())));
TaskManager taskManager = new TaskManager();
AsyncHornetQHTWorkItemHandler htHandler = new AsyncHornetQHTWorkItemHandler(taskClient, kSession, true);
htHandler.setPort(5445);
htHandler.connect();
kSession.getWorkItemManager().registerWorkItemHandler("Human Task", htHandler);
}
{code}
Anyone have any insight? I already searched the whole community, but nothing helped.
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13 years