Hi Tomo,
looking at the code (AMQSession_0_10.java), it seems that the
ack-flusher is created here (line 75):
private static Timer timer = new Timer("ack-flusher", true);
That is a single (java.util.)Timer is shared across all sessions on
*all* connections - the timer is not connection specific. Since it is
shared by all connections, it is not cancel()led when a connection is
close()ed. The Timer is created with isDaemon being true, so the fact
that the thread is never stopped wouldn't normally be an issue.
It would need a code change on our side to change this behaviour.
-- Rob
On 11 June 2015 at 09:30, Tomohisa Igarashi <[email protected]> wrote:
> Hi,
>
> When I run Qpid Java client from exec-maven-plugin, I get this warning
> complaining about remaining ack-flusher thread:
>
> ===================
> [WARNING] thread
> Thread[ack-flusher,5,org.switchyard.quickstarts.camel.amqp.binding.QpidClient]
> was interrupted but is still alive after waiting at least 15000msecs
> [WARNING] thread
> Thread[ack-flusher,5,org.switchyard.quickstarts.camel.amqp.binding.QpidClient]
> will linger despite being asked to die via interruption
> [WARNING] NOTE: 1 thread(s) did not finish despite being asked to via
> interruption. This is not a problem with exec:java, it is a problem
> with the running code. Although not serious, it should be remedied.
> [WARNING] Couldn't destroy threadgroup
> org.codehaus.mojo.exec.ExecJavaMojo$IsolatedThreadGroup[name=org.switchyard.quickstarts.camel.amqp.binding.QpidClient,maxpri=10]
> java.lang.IllegalThreadStateException
> ===================
>
> So ack-flusher thread is not stopped even after connection is closed.
> Is there a way to stop it safely?
>
> Whole client code is here:
> https://github.com/igarashitm/switchyard/blob/master/quickstarts/camel-amqp-binding/src/test/java/org/switchyard/quickstarts/camel/amqp/binding/QpidClient.java
>
> I tried adding connection.close() on this code with qpid-client 0.32,
> but I got same warning.
>
> Thanks,
> Tomo
>
> --
> IGARASHI Tomohisa mailto:[email protected]
>
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