activemq - 停止時の ActiveMQ 例外

Question

構成: Redhat 5.3、Sun Java 1.6.31、ActiveMQ 5.4.2

activemq を停止するたびに例外が発生します ($> service activemq stop)

ACTIVEMQ_HOME: /opt/apache/apache-activemq-5.4.2
ACTIVEMQ_BASE: /opt/apache/apache-activemq-5.4.2
Connecting to JMX URL: service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi
ERROR: java.lang.RuntimeException: Failed to execute stop task. Reason: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: 
    java.net.ConnectException: Connection refused]
java.lang.RuntimeException: Failed to execute stop task. Reason: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: 
    java.net.ConnectException: Connection refused]
    at org.apache.activemq.console.command.ShutdownCommand.runTask(ShutdownCommand.java:107)
    at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
    at org.apache.activemq.console.command.AbstractJmxCommand.execute(AbstractJmxCommand.java:316)
    at org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:143)
    at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
    at org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:85)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.activemq.console.Main.runTaskClass(Main.java:251)
    at org.apache.activemq.console.Main.main(Main.java:107)
ERROR: java.lang.Exception: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: 
    java.net.ConnectException: Connection refused]
java.lang.Exception: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: 
    java.net.ConnectException: Connection refused]
    at org.apache.activemq.console.command.ShutdownCommand.runTask(ShutdownCommand.java:108)
    at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
    at org.apache.activemq.console.command.AbstractJmxCommand.execute(AbstractJmxCommand.java:316)
    at org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:143)
    at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
    at org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:85)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.activemq.console.Main.runTaskClass(Main.java:251)
    at org.apache.activemq.console.Main.main(Main.java:107)
Caused by: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: 
    java.net.ConnectException: Connection refused]
    at javax.management.remote.rmi.RMIConnector.connect(Unknown Source)
    at javax.management.remote.JMXConnectorFactory.connect(Unknown Source)
    at javax.management.remote.JMXConnectorFactory.connect(Unknown Source)
    at org.apache.activemq.console.command.AbstractJmxCommand.createJmxConnector(AbstractJmxCommand.java:214)
    at org.apache.activemq.console.command.AbstractJmxCommand.createJmxConnection(AbstractJmxCommand.java:237)
    at org.apache.activemq.console.command.ShutdownCommand.runTask(ShutdownCommand.java:71)
    ... 11 more
Caused by: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: 
    java.net.ConnectException: Connection refused]
    at com.sun.jndi.rmi.registry.RegistryContext.lookup(Unknown Source)
    at com.sun.jndi.toolkit.url.GenericURLContext.lookup(Unknown Source)
    at javax.naming.InitialContext.lookup(Unknown Source)
    at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(Unknown Source)
    at javax.management.remote.rmi.RMIConnector.findRMIServer(Unknown Source)
    ... 17 more
Caused by: java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: 
    java.net.ConnectException: Connection refused
    at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
    at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
    at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
    at sun.rmi.server.UnicastRef.newCall(Unknown Source)
    at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
    ... 22 more
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(Unknown Source)
    at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at java.net.Socket.<init>(Unknown Source)
    at java.net.Socket.<init>(Unknown Source)
    at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown Source)
    at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown Source)
    ... 27 more

プロセスはまだ終了しますが、正常に終了しません。助言がありますか？

score 26 · Accepted Answer

修正を見つけましたが、それが根本的な問題に対処しているかどうかはわかりません。ActiveMQ が起動したら、次のコマンドを使用してポート 1099 が実際に開いているかどうかを確認しました。

$> netstat -lptun | grep 1099

このコマンドは、ポートが開いていない (ActiveMQ が開始されている) ことを示す何も出力しません。これは、ActiveMQ が開始されていても、JMX 接続をリッスンしていないことを意味します (これは、スクリプトがそれを停止しようとする方法です)。いろいろ調べた後、{ACTIVEMQ_HOME}/conf/activemq.xmlファイルにつながるこのリンクを見つけました。このファイルには、次のセクションがあります。

 <!-- 
     The managementContext is used to configure how ActiveMQ is exposed in 
     JMX. By default, ActiveMQ uses the MBean server that is started by 
     the JVM. For more information, see: 

         http://activemq.apache.org/jmx.html 
 -->
 <managementContext>
   <managementContext createConnector="false"/>
 </managementContext>

createConnector="true"を設定すると問題が解決しました (これにより、ActiveMQ の開始時に JVM 内で MBean サーバーが開始されます)。シャットダウン出力は次のようになります (予想どおり)。

...
ACTIVEMQ_HOME: /opt/apache/apache-activemq-5.4.2
ACTIVEMQ_BASE: /opt/apache/apache-activemq-5.4.2
Connecting to JMX URL: service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi
Stopping broker: localhost
.. FINISHED

さらに、このフラグを変更した後、ActiveMQ の開始後にデフォルトの JMX ポート (1099) が開いていることを確認できます。

$> netstat -lptun | grep 1099
tcp        0      0 :::1099                     :::*                        LISTEN      30033/java

activemq - 停止時の ActiveMQ 例外

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