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From Timothy Bish <tabish...@gmail.com>
Subject Re: deleting durable subscriber exception
Date Sat, 08 Feb 2014 12:22:38 GMT

Yup, there's a bug there.  The key is to set isUseJmx(false) in the test 
Christian created and then the exception will show up.

Please open an Jira issue for this.

On 02/08/2014 06:33 AM, Minh Tran wrote:
> I have tried the nightly snapshot below and the problem still exists there. Here is how
you can reproduce it.
>
> 1. Download fresh copy and install
> 2. Edit conf/activemq.xml and change broker line to
> <broker xmlns="http://activemq.apache.org/schema/core" brokerName="localhost" dataDirectory="${activemq.data}"
schedulerSupport="true">
>
> 3. Go to admin console and create a topic, http://localhost:8161/admin/topics.jsp
> 4. Go to admin console and create durable subscriber to topic above http://localhost:8161/admin/subscribers.jsp
> 5. Delete the durable subscriber using link on same page and it will fail
>
> Repeat all steps above but this time set schedulerSupport=false. Then it will delete
the durable without any errors.
>
> I looked at your unit test and it looks fine, all I can think of is running activemq
from the usual way is behaving differently to the unit test somehow.
>
> On 07/02/2014, at 3:41 PM, Christian Posta <christian.posta@gmail.com> wrote:
>
>> Actually, I cannot reproduce this on trunk:
>>
>> https://github.com/christian-posta/activemq/blob/AMQ-durable-sub-test/activemq-unit-tests/src/test/java/org/apache/activemq/bugs/AMQdurableSubTest.java#L50
>>
>>
>> Can you try with a nightly snapshot?
>>
>> https://repository.apache.org/content/repositories/snapshots/org/apache/activemq/apache-activemq/5.10-SNAPSHOT/
>>
>> On Thu, Feb 6, 2014 at 5:21 PM, Christian Posta
>> <christian.posta@gmail.com> wrote:
>>> Looks like a bug..... Can you open a JIRA?
>>>
>>> On Wed, Feb 5, 2014 at 9:39 PM, Minh Tran <minh.tran@winning.com.au> wrote:
>>>> Hi,
>>>>
>>>> Getting the following exception when attempting to delete the durable subscriber
in the admin console. Using 5.9.0.
>>>>
>>>> 2014-02-06 15:25:44,042 | WARN  | /admin/deleteSubscriber.action | org.eclipse.jetty.servlet.ServletHandler
| qtp1100010806-60
>>>> java.lang.ClassCastException: org.apache.activemq.broker.scheduler.SchedulerBroker
cannot be cast to org.apache.activemq.broker.region.RegionBroker
>>>>         at org.apache.activemq.advisory.AdvisoryBroker.removeSubscription(AdvisoryBroker.java:280)
>>>>         at org.apache.activemq.broker.BrokerFilter.removeSubscription(BrokerFilter.java:112)
>>>>         at org.apache.activemq.broker.BrokerFilter.removeSubscription(BrokerFilter.java:112)
>>>>         at org.apache.activemq.broker.BrokerFilter.removeSubscription(BrokerFilter.java:112)
>>>>         at org.apache.activemq.broker.BrokerFilter.removeSubscription(BrokerFilter.java:112)
>>>>         at org.apache.activemq.broker.MutableBrokerFilter.removeSubscription(MutableBrokerFilter.java:117)
>>>>         at org.apache.activemq.broker.jmx.BrokerView.destroyDurableSubscriber(BrokerView.java:430)
>>>>         at org.apache.activemq.web.controller.DeleteSubscriber.handleRequest(DeleteSubscriber.java:38)
>>>>         at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
>>>>         at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
>>>>         at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
>>>>         at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
>>>>         at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
>>>>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
>>>>         at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
>>>>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
>>>>         at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652)
>>>>         at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320)
>>>>         at org.apache.activemq.web.AuditFilter.doFilter(AuditFilter.java:59)
>>>>         at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
>>>>         at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
>>>>         at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
>>>>         at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
>>>>         at org.apache.activemq.web.filter.ApplicationContextFilter.doFilter(ApplicationContextFilter.java:102)
>>>>         at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
>>>>         at com.opensymphony.sitemesh.webapp.SiteMeshFilter.obtainContent(SiteMeshFilter.java:129)
>>>>         at com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.java:77)
>>>>         at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
>>>>         at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443)
>>>>         at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
>>>>         at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:521)
>>>>         at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
>>>>         at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044)
>>>>         at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372)
>>>>         at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189)
>>>>         at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978)
>>>>         at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
>>>>         at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
>>>>         at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:521)
>>>>         at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
>>>>         at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
>>>>         at org.eclipse.jetty.server.Server.handle(Server.java:367)
>>>>         at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:486)
>>>>         at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926)
>>>>         at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988)
>>>>         at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
>>>>         at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
>>>>         at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
>>>>         at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)
>>>>         at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
>>>>         at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
>>>>         at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
>>>>         at java.lang.Thread.run(Thread.java:695)
>>>>
>>>> If I turn off the scheduler in activemq.xml, then this problem goes away
so it's related to the scheduler. This is a very nasty bug because without the ability to
delete durable subscribers, dormant durables will eventually bring down the server. The offlineDurableSubcriberTimeout
doesn't seem to kill the durable subscriber either. Below is a config I use on the broker.
>>>>
>>>> <broker xmlns="http://activemq.apache.org/schema/core" brokerName="localhost"
dataDirectory="${activemq.data}" offlineDurableSubscriberTimeout="172800000" offlineDurableSubscriberTaskSchedule="3600000"
schedulerSupport="true" useJmx="true">
>>>>
>>>
>>>
>>> --
>>> Christian Posta
>>> http://www.christianposta.com/blog
>>> twitter: @christianposta
>>
>>
>> -- 
>> Christian Posta
>> http://www.christianposta.com/blog
>> twitter: @christianposta
>


-- 
Tim Bish
Sr Software Engineer | RedHat Inc.
tim.bish@redhat.com | www.fusesource.com | www.redhat.com
skype: tabish121 | twitter: @tabish121
blog: http://timbish.blogspot.com/


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