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https://issues.apache.org/jira/browse/AMQ-3583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pauli Kaila updated AMQ-3583:
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Attachment: exceptions.log
> Failures to page in queue messages and retrieving messages caused by
> NullPointerExceptions
> ------------------------------------------------------------------------------------------
>
> Key: AMQ-3583
> URL: https://issues.apache.org/jira/browse/AMQ-3583
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.4.2
> Environment: Network of brokers running on Windows XP SP3 machines.
> Java version is Sun JRE 1.6.0_23 32 bit.
> Reporter: Pauli Kaila
> Attachments: exceptions.log
>
>
> Our product is composed of a server and multiple clients. The server and each
> of the clients have their own internal ActiveMQ broker which are then joined
> in to a network of brokers.
> After having ran successfully for almost two months the server on one of our
> customer installations stopped communicating with the clients. Based on the
> logs available (see the attachment) the issue seems to stem from ActiveMQ,
> which is failing to page in messages and retrieving messages because of
> NullPointerExceptions. The situation was only resolved after we instructed
> the customer to restart the server process, which also restarted the ActiveMQ
> broker.
> Sadly we do not have remote access to that particular installation so we
> could not investigate the issue closer. The only diagnostics we have about
> the issue are the aforementioned log statements.
> The broker is using Apache DerbyDB 10.6.1.0 for storage instead of the KahaDB.
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