Robin Kåveland Hansen created CAMEL-6941:
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Summary: ConcurrentModificationException while shutting down camel
Key: CAMEL-6941
URL: https://issues.apache.org/jira/browse/CAMEL-6941
Project: Camel
Issue Type: Bug
Components: camel-core
Affects Versions: 2.11.0
Environment: jdk-1.7.0_45
Reporter: Robin Kåveland Hansen
Priority: Minor
Observed the following stacktrace while shutting down camel:
{code}
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 4.017 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 6.027 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 8.037 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 10.008 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
g org.apache.camel.impl.DefaultExecutorServiceManager.doShutdown()#301:
Forcing shutdown of ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda due first await termination
elapsed.
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 2.008 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 4.018 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 6.028 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 8.039 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
org.apache.camel.impl.DefaultExecutorServiceManager.awaitTermination()#401:
Waited 10.008 seconds for ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda to terminate...
g org.apache.camel.impl.DefaultExecutorServiceManager.doShutdown()#305:
Cannot completely force shutdown of ExecutorService:
java.util.concurrent.ThreadPoolExecutor@33c4bcda due second await termination
elapsed.
org.apache.camel.impl.DefaultExecutorServiceManager.doShutdown()#318:
Shutdown of ExecutorService: java.util.concurrent.ThreadPoolExecutor@33c4bcda
is shutdown: true and terminated: false took: 20.018 seconds.
g org.apache.camel.impl.DefaultCamelContext.shutdownServices()#1771: Error
occurred while shutting down service:
org.apache.camel.impl.DefaultExecutorServiceManager@37285252. This exception
will be ignored.
g Caused by java.util.ConcurrentModificationException - null
g at
java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
g at java.util.AbstractList$Itr.next(AbstractList.java:343)
g at
org.apache.camel.impl.DefaultExecutorServiceManager.doShutdown(DefaultExecutorServiceManager.java:442)
g at
org.apache.camel.support.ServiceSupport.shutdown(ServiceSupport.java:158)
g at
org.apache.camel.util.ServiceHelper.stopAndShutdownService(ServiceHelper.java:166)
g at
org.apache.camel.impl.DefaultCamelContext.shutdownServices(DefaultCamelContext.java:1766)
g at
org.apache.camel.impl.DefaultCamelContext.doStop(DefaultCamelContext.java:1681)
g at org.apache.camel.support.ServiceSupport.stop(ServiceSupport.java:92)
g at
org.apache.camel.core.xml.AbstractCamelContextFactoryBean.destroy(AbstractCamelContextFactoryBean.java:432)
g at
org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:211)
g at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:500)
g at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:476)
g at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:445)
g at
org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1090)
g at
org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1064)
g at
org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1010)
g at org.apache.camel.spring.Main.doStop(Main.java:152)
g at org.apache.camel.support.ServiceSupport.stop(ServiceSupport.java:92)
g at
org.apache.camel.main.MainSupport$HangupInterceptor.run(MainSupport.java:82)
org.apache.camel.impl.DefaultCamelContext.doStop()#1695: Uptime 35 days 23
hours
org.apache.camel.impl.DefaultCamelContext.doStop()#1696: Apache Camel 2.11.0
(CamelContext: camel-activemq) is shutdown in 51.196 seconds
{code}
I haven't seen this before but it seems to me that there must be more than one
thread doing something to DefaultExecutorServiceManager.executorServices
(ArrayList) at the same time.
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