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<p>Questions on specific kinds of errors. If you have seen a specific exception then check the <a shape="rect" href="exceptions.xml">Exceptions</a></p>

<ul class="childpages-macro"><li><a shape="rect" href="could-not-find-packetreader-for-packet-type-unknown-packet-type.xml">Could not find PacketReader for packet type - UNKNOWN PACKET TYPE</a></li><li><a shape="rect" href="exceptions.xml">Exceptions</a><ul class="childpages-macro"><li><a shape="rect" href="certificateunknown.xml">certificate_unknown</a></li><li><a shape="rect" href="ioexception-could-not-find-class-for-resource.xml">IOException - could not find class for resource</a></li><li><a shape="rect" href="javaiointerruptedioexception.xml">java.io.InterruptedIOException</a></li><li><a shape="rect" href="javaioioexception-failed-to-create-database-derbydb-see-the-next-exception-for-details.xml">java.io.IOException Failed to create database 'derbydb', see the next exception for details</a></li><li><a shape="rect" href="javalangnosuchmethoderror.xml">java.lang.NoSuchMethodError</a></li><li><a shape="rect" href="javalangnosuchmethodexception-orgactivemqraactivemqresourceadaptersetuseembeddedbroker.xml">java.lang.NoSuchMethodException org.activemq.ra.ActiveMQResourceAdapter.setUseEmbeddedBroker</a></li><li><a shape="rect" href="javalangoutofmemory.xml">java.lang.OutOfMemory</a></li><li><a shape="rect" href="javaxjmsjmsexception-wire-format-negociation-timeout-peer-did-not-send-his-wire-format.xml">javax.jms.JMSException - Wire format negociation timeout - peer did not send his wire format.</a></li><li><a shape="rect" href="jaxb-20-api-is-being-loaded-from-the-bootstrap-classloader-but-this-ri-needs-21-api.xml">JAXB 2.0 API is being loaded from the bootstrap classloader, but this RI () needs 2.1 API.</a></li><li><a shape="rect" href="jaxb-20-api-is-being-loaded-from-the-bootstrap-classloader-but-this-ri-xxx-needs-21-api.xml">JAXB 2.0 API is being loaded from the bootstrap classloader, but this RI (xxx) needs 2.1 API</a></li><li><a shape="rect" href="journal-is-already-opened-by-this-application.xml">Journal is already opened by this application</a></li><li><a shape="rect" href="noclassdeffounderror-orgspringframeworkcoreioresource.xml">NoClassDefFoundError - org.springframework.core.io.Resource</a></li><li><a shape="rect" href="no-suitable-driver.xml">No suitable driver</a></li></ul></li><li><a shape="rect" href="i-am-having-problems-with-the-spring-jmstemplate.xml">I am having problems with the Spring JmsTemplate</a></li><li><a shape="rect" href="i-am-not-receiving-any-messages-what-is-wrong.xml">I am not receiving any messages, what is wrong</a></li><li><a shape="rect" href="i-cannot-connect-to-activemq-from-jconsole.xml">I cannot connect to ActiveMQ from JConsole</a></li><li><a shape="rect" href="i-do-not-receive-messages-in-my-second-consumer.xml">I do not receive messages in my second consumer</a></li><li><a shape="rect" href="i-get-errors-building-the-code-whats-wrong.xml">I get errors building the code whats wrong</a></li><li><a shape="rect" href="log4j-warn-no-appenders-could-be-found-for-logger.xml">log4j-WARN No appenders could be found for logger</a></li><li><a shape="rect" href="multicast-watch-out-for-ipv6-vs-ipv4-support-on-your-operating-system-or-distribution-or-network.xml">Multicast - Watch out for IPV6 vs IPV4 support on your operating system or distribution or network</a></li><li><a shape="rect" href="my-producer-blocks.xml">My producer blocks</a></li><li><a shape="rect" href="onmessage-method-of-messagelistener-is-never-called.xml">onMessage method of MessageListener is never called</a></li><li><a shape="rect" href="resource-adapter-does-not-seem-to-pool-connections.xml">Resource Adapter does not seem to pool connections</a></li><li><a shape="rect" href="slow-networks-drop-large-messages.xml">Slow networks drop large messages</a></li><li><a shape="rect" href="the-broker-will-not-start.xml">The Broker will not start</a></li><li><a shape="rect" href="the-vm-transport-starts-a-broker-before-my-configured-broker-starts.xml">The vm transport starts a broker before my configured broker starts</a></li><li><a shape="rect" href="why-do-i-not-get-all-of-the-messages-i-sent.xml">Why do I not get all of the messages I sent</a></li><li><a shape="rect" href="why-do-i-not-receive-messages-on-my-durable-topic-subscription.xml">Why do I not receive messages on my durable topic subscription</a></li><li><a shape="rect" href="why-do-kahadb-log-files-remain-after-cleanup.xml">Why do KahaDB log files remain after cleanup</a></li></ul></div>