Robert Panzer created OPENEJB-2115:
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Summary: Asynchronous EJB method invocation fails with
Asynchronous.QueueType=PRIORITY
Key: OPENEJB-2115
URL: https://issues.apache.org/jira/browse/OPENEJB-2115
Project: OpenEJB
Issue Type: Bug
Components: ejb31
Affects Versions: 4.7.2
Environment: TomEE 1.7.2
Reporter: Robert Panzer
Priority: Minor
When setting the option {{Asynchronous.QueueType=PRIORITY}} TomEE will set a
{{java.util.concurrent.PriorityQueue}} as work queue on the ThreadPoolExecutor.
A PriorityQueue expects that objects added to it are {{java.lang.Comparable}}.
As {{ThreadPoolExecutor}} adds a {{java.util.concurrent.RunnableFuture}} that
wraps the {{Callable}} created by TomEE the invocation fails with a
ClassCastException:
{quote}
java.lang.ClassCastException: java.util.concurrent.FutureTask cannot be cast to
java.lang.Comparable
at
java.util.concurrent.PriorityBlockingQueue.siftUpComparable(PriorityBlockingQueue.java:357)
at
java.util.concurrent.PriorityBlockingQueue.offer(PriorityBlockingQueue.java:489)
at
java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1361)
at
java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
at
org.apache.openejb.async.AsynchronousPool.invoke(AsynchronousPool.java:76)
at
org.apache.openejb.core.ivm.EjbObjectProxyHandler.businessMethod(EjbObjectProxyHandler.java:263)
at
org.apache.openejb.core.ivm.EjbObjectProxyHandler._invoke(EjbObjectProxyHandler.java:92)
at
org.apache.openejb.core.ivm.BaseEjbProxyHandler.invoke(BaseEjbProxyHandler.java:322)
at
foo.bar.asyncejb.AsyncEJB1$$LocalBeanProxy.simpleCall(foo/bar/asyncejb/AsyncEJB1.java)
at foo.bar.AsyncTest.test(AsyncTest.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
{quote}
Therefore I think that offering the option
{{AsynchronousPool.QueueType=PRIORITY}} does not make any sense at all and
could be completely removed.
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