[CAMEL-7666] CamelContext.addService may fail with java.util.ConcurrentModificationException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.12.4, 2.13.2
• Fix Version/s: 2.12.5, 2.13.3, 2.14.0
• Component/s: camel-core
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Claus Ibsen
• Created: 07/Aug/14 08:18
• Updated: 07/Aug/14 14:49
• Resolved: 07/Aug/14 14:49

Description

Most likely to happen only for pojo consuming where you may have a JMS listener execute concurrently and do some routing, and on initial messages then they need to register as service in CamelContext which can trigger to this ConcurrentModificationException.

2014-08-07 10:09:09,338 [sonnel.records]] WARN  EndpointMessageListener        - Execution of JMS message listener failed. Caused by: [org.apache.camel.FailedToCreateProducerException - Failed to create Producer for endpoint: Endpoint[file://target/messages/amer/finance_pickup]. Reason: java.util.ConcurrentModificationException]
org.apache.camel.FailedToCreateProducerException: Failed to create Producer for endpoint: Endpoint[file://target/messages/amer/finance_pickup]. Reason: java.util.ConcurrentModificationException
	at org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:410)
	at org.apache.camel.impl.ProducerCache.acquireProducer(ProducerCache.java:123)
	at org.apache.camel.processor.RecipientListProcessor.createProcessorExchangePairs(RecipientListProcessor.java:174)
	at org.apache.camel.processor.MulticastProcessor.process(MulticastProcessor.java:219)
	at org.apache.camel.processor.RecipientList.sendToRecipientList(RecipientList.java:167)
	at org.apache.camel.component.bean.MethodInfo$1.doProceed(MethodInfo.java:286)
	at org.apache.camel.component.bean.MethodInfo$1.proceed(MethodInfo.java:252)
	at org.apache.camel.component.bean.BeanProcessor.process(BeanProcessor.java:166)
	at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:105)
	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:87)
	at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:103)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:562)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:500)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:468)
	at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:325)
	at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:263)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1101)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1093)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:990)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
	at java.util.ArrayList$Itr.next(ArrayList.java:831)
	at org.apache.camel.impl.DefaultCamelContext.doAddService(DefaultCamelContext.java:976)
	at org.apache.camel.impl.DefaultCamelContext.addService(DefaultCamelContext.java:963)
	at org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:408)
	... 22 more
2014-08-07 10:09:09,345 [main           ] INFO  SpringCamelContext             - Apache Camel 2.14-SNAPSHOT (CamelContext: camel-1) started in 0.254 seconds
2014-08-07 10:09:14,347 [main           ] INFO  CamelContextTest               - ********************************************************************************
2014-08-07 10:09:14,347 [main           ] INFO  CamelContextTest               - Testing done: testCheckFiles(org.apache.camel.example.pojo_messaging.CamelContextTest)