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From "Pauli Kaila (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-3583) Failures to page in queue messages and retrieving messages caused by NullPointerExceptions
Date Wed, 09 Nov 2011 12:38:51 GMT
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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