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https://issues.apache.org/jira/browse/AMQ-4073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timothy Bish resolved AMQ-4073.
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Resolution: Fixed
Fixed on trunk. Will appear in the next nightly.
> Cannot shut down broker under certain conditions with schedule delivery and
> producer flow control
> -------------------------------------------------------------------------------------------------
>
> Key: AMQ-4073
> URL: https://issues.apache.org/jira/browse/AMQ-4073
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.6.0
> Reporter: David Valeri
> Assignee: Timothy Bish
> Priority: Minor
> Fix For: 5.9.0
>
> Attachments: JobSchedulerBrokerShutdownTest.java
>
>
> When producer flow control is enabled and the the job scheduler attempts
> delivery, the job scheduler blocks while attempting delivery. This blocking
> holds the lock on the job scheduler and stops all other job scheduler
> activity. The holding of the lock on the job scheduler also blocks the
> delivery of additional scheduled messages and can impact the shutdown of the
> broker.
> org.apache.activemq.broker.scheduler.JobSchedulerImpl.schedule(String,
> ByteSequence, String, long, long, int) waits for the lock while the job
> scheduler is blocked. Any transport connections attempting to call this
> method get blocked and are also unable to shutdown. Connections do log
> "2012-09-24 12:04:23,661 [main ] - INFO TransportConnection
> - The connection to 'vm://localhost#0' is taking a long time to
> shutdown." when attempting shutdown with the job scheduler blocked and a
> client attempting to schedule a message, but do not log anything when this
> situation occurs under normal broker operation. The producer simply stops
> producing messages.
> The shutdown is blocked by
> org.apache.activemq.broker.TransportConnection.serviceLock as it is owned by
> the blocked thread trying to schedule a new message.
> I have attached a unit test that reproduces the issue. The test will not
> complete as it hangs on the broker shutdown as described above.
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