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I have an ActiveMQ v5.7.0 broker, running in Karaf v2.3.3, that I want to enable for remote connections. I've set the broker URL to 0.0.0.0:61616, to enable it to listen to network traffic. I've opened the firewall to allow the traffic from the client machines. However, all remote connections are being refused. A quick netstat seems to tell me that the broker isn't listening outside of localhost.

jeremy@server:~$ netstat -pan | grep 61616
tcp6       0      0 127.0.0.1:61616         :::*                    LISTEN      -

Looking at the broker via Hawtio tells me that the URL looks as it should.

Transport connectors    Openwire: tcp://0.0.0.0:61616?maximumConnections=1000&wireformat.maxFrameSize=104857600

The firewall is definitely OK, as the connections are being refused rather than just being dropped.

The broker is responding correctly to connections from localhost.

2013-10-14 17:34:29 Connected to localhost:61613

This is the sort of error I get from remote connections:-

Error connecting to xxx.xxx.xxx.xxx:61613: IO::Socket::INET: connect: Connection refused at /usr/local/share/perl/5.14.2/Net/Stomp.pm line 102.

EDIT: telnet output added

Localhost port 61613

jeremy@server:~$ telnet localhost 61613
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.

Remote connection port 61613

jeremy@other-server:~$ telnet xxx.xxx.xxx.xxx 61613
Trying xxx.xxx.xxx.xxx...
telnet: Unable to connect to remote host: Connection refused

Localhost connection port 61616 (this one is interesting)

jeremy@server:~$ telnet localhost 61616
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
ðActiveMQ       Þ
MaxFrameSizÿÿÿ  CacheSize
CacheEnabledSizePrefixDisabled MaxInactivityDurationInitalDelay'TcpNoDelayEnabledMaxInactivityDurationu0TightEncodingEnabledStackTraceEnabledPuTTYConnection closed by foreign host.

Remote connection port 61616

jeremy@other-server:~$ telnet xxx.xxx.xxx.xxx 61616
Trying xxx.xxx.xxx.xxx...
telnet: Unable to connect to remote host: Connection refused

EDIT: remote server karaf log output added

2013-10-15 19:00:46,599 | ERROR | c.event.invited] | faultJmsMessageListenerContainer | .DefaultMessageListenerContainer  909 | 69 - org.springframework.jms - 3.2.4.RELEASE | Could not refresh JMS Connection for destination 'Consumer.notifications.VirtualTopic.event.invited' - retrying in 5000 ms. Cause: Error while attempting to add new Connection to the pool; nested exception is javax.jms.JMSException: Could not connect to broker URL: tcp://xxx.xxx.xxx.xxx:61616. Reason: java.net.ConnectException: Connection refused

Here's the broker.xml.

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
  xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.0.0"
  xmlns:ext="http://aries.apache.org/blueprint/xmlns/blueprint-ext/v1.0.0"
  xmlns:amq="http://activemq.apache.org/schema/core">

  <ext:property-placeholder />

  <broker xmlns="http://activemq.apache.org/schema/core"
    brokerName="jellyfish-messaging"
    dataDirectory="${karaf.data}/activemq/localhost"
    useShutdownHook="false"
    persistent="true"
    schedulerSupport="true"
    startAsync="true">

    <destinationPolicy>
      <policyMap>
        <policyEntries>
          <policyEntry topic=">" producerFlowControl="true" memoryLimit="1mb">
            <pendingSubscriberPolicy>
              <vmCursor />
            </pendingSubscriberPolicy>
          </policyEntry>
          <policyEntry queue=">" producerFlowControl="true" memoryLimit="1mb">
          </policyEntry>
        </policyEntries>
      </policyMap>
    </destinationPolicy> 

    <persistenceAdapter>
      <kahaDB directory="${karaf.data}/activemq/localhost/kahadb"/>
    </persistenceAdapter>

    <systemUsage>
        <systemUsage>
            <memoryUsage>
                <memoryUsage limit="64 mb"/>
            </memoryUsage>
            <storeUsage>
                <storeUsage limit="100 gb"/>
            </storeUsage>
            <tempUsage>
                <tempUsage limit="50 gb"/>
            </tempUsage>
        </systemUsage>
    </systemUsage>

    <!-- The transport connectors ActiveMQ will listen to -->
    <transportConnectors>
        <!-- DOS protection, limit concurrent connections to 1000 and frame size to 100MB -->
        <transportConnector name="openwire" uri="tcp://0.0.0.0:61616?maximumConnections=1000&amp;wireformat.maxFrameSize=104857600"/>
        <transportConnector name="stomp" uri="stomp://0.0.0.0:61613?maximumConnections=1000&amp;wireformat.maxFrameSize=104857600"/>
    </transportConnectors>

  </broker>

  <bean id="jmsConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
    <property name="brokerURL" value="tcp://0.0.0.0:61616" />
  </bean>

  <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory">
    <property name="maxConnections" value="8" />
    <property name="maximumActive" value="500" />
    <property name="connectionFactory" ref="jmsConnectionFactory" />
  </bean>

  <bean id="resourceManager" class="org.apache.activemq.pool.ActiveMQResourceManager" init-method="recoverResource">
    <property name="transactionManager" ref="transactionManager" />
    <property name="connectionFactory" ref="jmsConnectionFactory" />
    <property name="resourceName" value="activemq.localhost" />
  </bean>

  <bean id="jmsConfig" class="org.apache.camel.component.jms.JmsConfiguration">
    <property name="connectionFactory" ref="pooledConnectionFactory" />
    <property name="transacted" value="false" />
    <property name="concurrentConsumers" value="10" />
  </bean>

  <bean id="activemq" class="org.apache.activemq.camel.component.ActiveMQComponent">
    <property name="configuration" ref="jmsConfig" />
  </bean>

  <reference id="transactionManager" interface="javax.transaction.TransactionManager" />

  <service ref="pooledConnectionFactory" interface="javax.jms.ConnectionFactory">
    <service-properties>
      <entry key="name" value="localhost"/>
    </service-properties>
  </service>
</blueprint>

Can anyone tell me what I'm missing?

Thanks,

J.

4

1 回答 1

2

我已经解决了这个问题。这既不是防火墙的问题，也不是 ActiveMQ 配置的问题。

定义 ActiveMQ 代理的 Karaf kar 文件包括activemq-web-console功能。我们一直没有使用这个功能，因为我们是 Hawtio 的粉丝，所以从来没有配置过它。

根据这篇博文，控制台提供了默认设置，包括侦听端口 61616。这意味着两个代理在启动时处于竞争状态，而 webconsole 定义的一个通常获胜。由于默认情况下它没有配置为远程访问，它只锁定本地主机连接的端口。

赠品是 Karaf 主目录中一个名为${activemq.data}（字面意思）的目录，其中包含第二个 Kahadb 存储库。我们所有的代理配置都设置为使用数据目录，并且我们从未专门设置 ActiveMQ 环境变量，因此这导致我们寻找第二个代理可能来自哪里。

如果我们在 Karaf 会话中执行activemq:list可能会更快地发现它，因为它列出了两个经纪人。

简单的解决方案 -从功能 XML中删除activemq-web-console 。

于 2013-10-21T15:23:07.933 回答