Purpose
Here are a list of commonly asked questions and answers. Click on the the bolded questions for the answer to unfold. If you have any questions which are not on this list, please email our qpid-user list.
Contents
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Getting Started
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If you get a java.lang.reflect.InvocationTargetException on startup, wrapped as ConfigurationException like this:
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Error configuring message broker: org.apache.commons.configuration.ConfigurationException: java.lang.reflect.InvocationTargetException
2008-09-26 15:14:56,529 ERROR [main] server.Main (Main.java:206) - Error configuring message broker: org.apache.commons.configuration.ConfigurationException: java.lang.reflect.InvocationTargetException
org.apache.commons.configuration.ConfigurationException: java.lang.reflect.InvocationTargetException
at org.apache.qpid.server.security.auth.database.ConfigurationFilePrincipalDatabaseManager.initialisePrincipalDatabase(ConfigurationFilePrincipalDatabaseManager.java:158)
at org.apache.qpid.server.security.auth.database.ConfigurationFilePrincipalDatabaseManager.initialisePrincipalDatabases(ConfigurationFilePrincipalDatabaseManager.java:87)
at org.apache.qpid.server.security.auth.database.ConfigurationFilePrincipalDatabaseManager.<init>(ConfigurationFilePrincipalDatabaseManager.java:56)
at org.apache.qpid.server.registry.ConfigurationFileApplicationRegistry.initialise(ConfigurationFileApplicationRegistry.java:117)
at org.apache.qpid.server.registry.ApplicationRegistry.initialise(ApplicationRegistry.java:79)
at org.apache.qpid.server.registry.ApplicationRegistry.initialise(ApplicationRegistry.java:67)
at org.apache.qpid.server.Main.startup(Main.java:260)
at org.apache.qpid.server.Main.execute(Main.java:196)
at org.apache.qpid.server.Main.<init>(Main.java:96)
at org.apache.qpid.server.Main.main(Main.java:454)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.qpid.server.security.auth.database.ConfigurationFilePrincipalDatabaseManager.initialisePrincipalDatabase(ConfigurationFilePrincipalDatabaseManager.java:148)
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To do this, you need to edit the passwordDir element for the broker, which may have a comment to that effect:
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<passwordDir><!-- Change to the location --></passwordDir>
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The file should be named passwd by default but if you want to you can change this by editing this element:
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<value>${passwordDir}/passwd</value>
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Queue names may consist of any mixture of digits, letters, and underscores.
The bindingurlformat BindingURLFormat is described in more detail on it's own page.
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How do I connect to the broker using JNDI
see How to use Use JNDI
I'm using Spring and Weblogic - can you help me with the configuration for moving over to Qpid
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The system property
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amqj.logging.level
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can be used to configure the logging level.
For the broker, you can use the environment variable AMQJ_LOGGING_LEVEL which is picked up by the qpid-run script (called by qpid-server to start the broker) at runtime.
For client code that you've written, simply pass in a system property to your command line to set it to the level you'd like i.e.
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-Damqj.logging.level=INFO
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For additional details on what ports the broker uses see this FAQ entry.
For more detailed information on configuration, please see Qpid Design - Configuration
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The following command line options are available:
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QpidBrokerCommandLineOptions |
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How do I authenticate with the broker and What user id & password should I use
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So, if you're using a queue called 'devqueue' you can ensure that it is created at startup by using an entry something like this:
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<virtualhosts>
<default>test</default>
<virtualhost>
<name>test</name>
<test>
<queue>
<name>devqueue</name>
<devqueue>
<exchange>amq.direct</exchange>
<maximumQueueDepth>4235264</maximumQueueDepth> <!-- 4Mb -->
<maximumMessageSize>2117632</maximumMessageSize> <!-- 2Mb -->
<maximumMessageAge>600000</maximumMessageAge> <!-- 10 mins -->
</devqueue>
</queue>
</test>
</virtualhost>
</virtualhosts>
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is set to amq.direct for the <queue/> element you're trying to publish to.
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2009-01-12 15:26:27,957 ERROR [pool-11-thread-2] protocol.AMQMinaProtocolSession (AMQMinaProtocolSession.java:365) - Unexpected exception while processing frame. Closing connection.
java.lang.NullPointerException
at org.apache.qpid.server.security.access.PrincipalPermissions.authorise(PrincipalPermissions.java:398)
at org.apache.qpid.server.security.access.plugins.SimpleXML.authorise(SimpleXML.java:302)
at org.apache.qpid.server.handler.QueueBindHandler.methodReceived(QueueBindHandler.java:111)
at org.apache.qpid.server.handler.ServerMethodDispatcherImpl.dispatchQueueBind(ServerMethodDispatcherImpl.java:498)
at org.apache.qpid.framing.amqp_8_0.QueueBindBodyImpl.execute(QueueBindBodyImpl.java:167)
at org.apache.qpid.server.state.AMQStateManager.methodReceived(AMQStateManager.java:204)
at org.apache.qpid.server.protocol.AMQMinaProtocolSession.methodFrameReceived(AMQMinaProtocolSession.java:295)
at org.apache.qpid.framing.AMQMethodBodyImpl.handle(AMQMethodBodyImpl.java:93)
at org.apache.qpid.server.protocol.AMQMinaProtocolSession.frameReceived(AMQMinaProtocolSession.java:235)
at org.apache.qpid.server.protocol.AMQMinaProtocolSession.dataBlockReceived(AMQMinaProtocolSession.java:191)
at org.apache.qpid.server.protocol.AMQPFastProtocolHandler.messageReceived(AMQPFastProtocolHandler.java:244)
at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived(AbstractIoFilterChain.java:703)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:362)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1200(AbstractIoFilterChain.java:54)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:800)
at org.apache.qpid.pool.PoolingFilter.messageReceived(PoolingFilter.java:371)
at org.apache.mina.filter.ReferenceCountingIoFilter.messageReceived(ReferenceCountingIoFilter.java:96)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:362)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1200(AbstractIoFilterChain.java:54)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:800)
at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flush(SimpleProtocolDecoderOutput.java:60)
at org.apache.mina.filter.codec.QpidProtocolCodecFilter.messageReceived(QpidProtocolCodecFilter.java:174)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:362)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1200(AbstractIoFilterChain.java:54)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:800)
at org.apache.qpid.pool.Event$ReceivedEvent.process(Event.java:86)
at org.apache.qpid.pool.Job.processAll(Job.java:110)
at org.apache.qpid.pool.Job.run(Job.java:149)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
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Qpid Java FAQ 