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https://issues.apache.org/jira/browse/CXF-2002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12701443#action_12701443
]
Freeman Fang edited comment on CXF-2002 at 4/22/09 2:37 AM:
------------------------------------------------------------
Hi Christian and Sergey,
I'm trying to verify this fix works in Servicemix now.
And I just found that JMSDestination.activate() method will hang(actually hang
when AbstractJmsListeningContainer.initialize), the stacktrace is
"Timer-4" daemon prio=1 tid=0x81a96d10 nid=0x1d6c in Object.wait()
[0x7f7be000..0x7f7beeb0]
at java.lang.Object.wait(Native Method)
- waiting on <0xafb871a0> (a java.lang.Object)
at java.lang.Object.wait(Object.java:474)
at
org.springframework.util.ConcurrencyThrottleSupport.beforeAccess(ConcurrencyThrottleSupport.java:118)
- locked <0xafb871a0> (a java.lang.Object)
at
org.springframework.core.task.SimpleAsyncTaskExecutor$ConcurrencyThrottleAdapter.beforeAccess(SimpleAsyncTaskExecutor.java:169)
at
org.springframework.core.task.SimpleAsyncTaskExecutor.execute(SimpleAsyncTaskExecutor.java:141)
at
org.springframework.core.task.SimpleAsyncTaskExecutor.execute(SimpleAsyncTaskExecutor.java:126)
at
org.springframework.jms.listener.DefaultMessageListenerContainer.doRescheduleTask(DefaultMessageListenerContainer.java:495)
at
org.springframework.jms.listener.AbstractJmsListeningContainer.rescheduleTaskIfNecessary(AbstractJmsListeningContainer.java:474)
- locked <0xafb52a88> (a java.lang.Object)
at
org.springframework.jms.listener.DefaultMessageListenerContainer.scheduleNewInvoker(DefaultMessageListenerContainer.java:532)
at
org.springframework.jms.listener.DefaultMessageListenerContainer.doInitialize(DefaultMessageListenerContainer.java:485)
- locked <0xafb67c08> (a java.lang.Object)
at
org.springframework.jms.listener.AbstractJmsListeningContainer.initialize(AbstractJmsListeningContainer.java:160)
at
org.springframework.jms.listener.AbstractPollingMessageListenerContainer.initialize(AbstractPollingMessageListenerContainer.java:199)
at
org.springframework.jms.listener.DefaultMessageListenerContainer.initialize(DefaultMessageListenerContainer.java:451)
at
org.apache.cxf.transport.jms.JMSFactory.createJmsListener(JMSFactory.java:171)
at
org.apache.cxf.transport.jms.JMSDestination.activate(JMSDestination.java:105)
at
org.apache.cxf.transport.AbstractObservable.setMessageObserver(AbstractObservable.java:48)
- locked <0xb0e3f2d8> (a org.apache.cxf.transport.jms.JMSDestination)
at org.apache.cxf.endpoint.ServerImpl.start(ServerImpl.java:120)
at
org.apache.servicemix.cxfbc.CxfBcConsumer.start(CxfBcConsumer.java:325)
at
org.apache.servicemix.common.endpoints.SimpleEndpoint.activate(SimpleEndpoint.java:58)
- locked <0xb0e52018> (a org.apache.servicemix.cxfbc.CxfBcConsumer)
at org.apache.servicemix.common.ServiceUnit.start(ServiceUnit.java:53)
at
org.apache.servicemix.common.BaseServiceUnitManager.start(BaseServiceUnitManager.java:151)
- locked <0x92087f10> (a
org.apache.servicemix.common.BaseServiceUnitManager)
at
org.apache.servicemix.jbi.framework.ServiceUnitLifeCycle.start(ServiceUnitLifeCycle.java:103)
at
org.apache.servicemix.jbi.framework.ServiceAssemblyLifeCycle.start(ServiceAssemblyLifeCycle.java:132)
- locked <0xb0e88458> (a
org.apache.servicemix.jbi.framework.ServiceAssemblyLifeCycle)
at
org.apache.servicemix.jbi.framework.DeploymentService.start(DeploymentService.java:378)
After digging the code, I found that this error might be introduced by the
commit http://svn.apache.org/viewvc?rev=737356&view=rev
If I remove the changes in this commit for JMSFactory.java
+ } else {
+ SimpleAsyncTaskExecutor taskExecutor = new
SimpleAsyncTaskExecutor();
+
taskExecutor.setConcurrencyLimit(jmsConfig.getMaxConcurrentTasks());
+ jmsListener.setTaskExecutor(taskExecutor);
}
then the hang disapper.
I'm not sure if this piece of code is really necessary here for addressing
CXF-2002, Could you please shed me some light?
My configuration for JMSFeature looks like
<bean class="org.apache.cxf.transport.jms.JMSConfigFeature">
<property name="jmsConfig">
<bean
class="org.apache.cxf.transport.jms.JMSConfiguration">
<property name="connectionFactory">
<ref bean="myConnectionFactory" />
</property>
<property name="targetDestination">
<value>dynamicQueues/person.queue</value>
</property>
<property name="useJms11">
<value>true</value>
</property>
<property name="timeToLive">
<value>500000</value>
</property>
<property name="concurrentConsumers">
<value>1</value>
</property>
<property name="maxConcurrentConsumers">
<value>1</value>
</property>
<property name="maxSuspendedContinuations">
<value>1</value>
</property>
<property name="cacheLevel">
<value>2</value>
</property>
</bean>
</property>
</bean>
<bean id="myConnectionFactory"
class="org.springframework.jms.connection.SingleConnectionFactory">
<property name="targetConnectionFactory">
<bean class="org.apache.activemq.ActiveMQConnectionFactory">
<property name="brokerURL" value="tcp://localhost:61616" />
</bean>
</property>
</bean>
Do I miss something?
Thanks
Freeman
was (Author: ffang):
Hi Christian and Sergey,
I'm trying to verify this fix works in Servicemix now.
And I just found that JMSDestination.activate() method will hang(actually hang
when AbstractJmsListeningContainer.initialize), the stacktrace is
"Timer-4" daemon prio=1 tid=0x81a96d10 nid=0x1d6c in Object.wait()
[0x7f7be000..0x7f7beeb0]
at java.lang.Object.wait(Native Method)
- waiting on <0xafb871a0> (a java.lang.Object)
at java.lang.Object.wait(Object.java:474)
at
org.springframework.util.ConcurrencyThrottleSupport.beforeAccess(ConcurrencyThrottleSupport.java:118)
- locked <0xafb871a0> (a java.lang.Object)
at
org.springframework.core.task.SimpleAsyncTaskExecutor$ConcurrencyThrottleAdapter.beforeAccess(SimpleAsyncTaskExecutor.java:169)
at
org.springframework.core.task.SimpleAsyncTaskExecutor.execute(SimpleAsyncTaskExecutor.java:141)
at
org.springframework.core.task.SimpleAsyncTaskExecutor.execute(SimpleAsyncTaskExecutor.java:126)
at
org.springframework.jms.listener.DefaultMessageListenerContainer.doRescheduleTask(DefaultMessageListenerContainer.java:495)
at
org.springframework.jms.listener.AbstractJmsListeningContainer.rescheduleTaskIfNecessary(AbstractJmsListeningContainer.java:474)
- locked <0xafb52a88> (a java.lang.Object)
at
org.springframework.jms.listener.DefaultMessageListenerContainer.scheduleNewInvoker(DefaultMessageListenerContainer.java:532)
at
org.springframework.jms.listener.DefaultMessageListenerContainer.doInitialize(DefaultMessageListenerContainer.java:485)
- locked <0xafb67c08> (a java.lang.Object)
at
org.springframework.jms.listener.AbstractJmsListeningContainer.initialize(AbstractJmsListeningContainer.java:160)
at
org.springframework.jms.listener.AbstractPollingMessageListenerContainer.initialize(AbstractPollingMessageListenerContainer.java:199)
at
org.springframework.jms.listener.DefaultMessageListenerContainer.initialize(DefaultMessageListenerContainer.java:451)
at
org.apache.cxf.transport.jms.JMSFactory.createJmsListener(JMSFactory.java:171)
at
org.apache.cxf.transport.jms.JMSDestination.activate(JMSDestination.java:105)
at
org.apache.cxf.transport.AbstractObservable.setMessageObserver(AbstractObservable.java:48)
- locked <0xb0e3f2d8> (a org.apache.cxf.transport.jms.JMSDestination)
at org.apache.cxf.endpoint.ServerImpl.start(ServerImpl.java:120)
at
org.apache.servicemix.cxfbc.CxfBcConsumer.start(CxfBcConsumer.java:325)
at
org.apache.servicemix.common.endpoints.SimpleEndpoint.activate(SimpleEndpoint.java:58)
- locked <0xb0e52018> (a org.apache.servicemix.cxfbc.CxfBcConsumer)
at org.apache.servicemix.common.ServiceUnit.start(ServiceUnit.java:53)
at
org.apache.servicemix.common.BaseServiceUnitManager.start(BaseServiceUnitManager.java:151)
- locked <0x92087f10> (a
org.apache.servicemix.common.BaseServiceUnitManager)
at
org.apache.servicemix.jbi.framework.ServiceUnitLifeCycle.start(ServiceUnitLifeCycle.java:103)
at
org.apache.servicemix.jbi.framework.ServiceAssemblyLifeCycle.start(ServiceAssemblyLifeCycle.java:132)
- locked <0xb0e88458> (a
org.apache.servicemix.jbi.framework.ServiceAssemblyLifeCycle)
at
org.apache.servicemix.jbi.framework.DeploymentService.start(DeploymentService.java:378)
After digging the code, I found that this error might be introduced by the
commit http://svn.apache.org/viewvc?rev=737356&view=rev
If I remove the changes in this commit for JMSFactory.java
+ } else {
+ SimpleAsyncTaskExecutor taskExecutor = new
SimpleAsyncTaskExecutor();
+
taskExecutor.setConcurrencyLimit(jmsConfig.getMaxConcurrentTasks());
+ jmsListener.setTaskExecutor(taskExecutor);
}
then the hang disapper.
I'm not sure if this piece of code is really necessary here for addressing
CXF-2002, Could you please shed me some light?
My configuration for JMSFeature looks like
<bean class="org.apache.cxf.transport.jms.JMSConfigFeature">
<property name="jmsConfig">
<bean
class="org.apache.cxf.transport.jms.JMSConfiguration">
<property name="concurrentConsumers">
<value>25</value>
</property>
<property name="connectionFactory">
<ref bean="myConnectionFactory" />
</property>
<property name="targetDestination">
<value>dynamicQueues/person.queue</value>
</property>
<property name="useJms11">
<value>true</value>
</property>
</bean>
</property>
</bean>
<bean id="myConnectionFactory"
class="org.springframework.jms.connection.SingleConnectionFactory">
<property name="targetConnectionFactory">
<bean class="org.apache.activemq.ActiveMQConnectionFactory">
<property name="brokerURL" value="tcp://localhost:61616" />
</bean>
</property>
</bean>
Do I miss something?
Thanks
Freeman
> Server async jms transport needs dynamic mechanism to throttle message
> consumption
> ----------------------------------------------------------------------------------
>
> Key: CXF-2002
> URL: https://issues.apache.org/jira/browse/CXF-2002
> Project: CXF
> Issue Type: Improvement
> Components: Transports
> Affects Versions: 2.0.9, 2.1.3, 2.0.10
> Reporter: Ron Gavlin
> Assignee: Sergey Beryozkin
>
> Currently, the server-side async jms transport has no mechanism to throttle
> consumption of incoming messages. This becomes problematic in scenarios where
> a large backlog of messages exists on the input queue. In this case, it is
> likely that the cxf server will overload its internal work item queues
> resulting in problems. A dynamic throttling mechanism on the async jms server
> is required to avoid this problem.
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