ActiveMQ wyjątek podczas zatrzymywania

Question

Konfiguracja: RedHat 5.3, Sun Java 1.6.31, ActiveMQ 5.4.2

Dostaję wyjątek każdym razem, kiedy przestać ActiveMQ ($> Serwis ActiveMQ przystanek)

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 

Proces wciąż umiera, ale nie z gracją. Jakieś sugestie?

Answer 1

Znalazłem poprawkę, ale nie jestem pewien, czy rozwiązuje problem root. Po ActiveMQ rozpoczęła sprawdziłem aby zobaczyć czy port 1099 jest rzeczywiście otwarte za pomocą następującego polecenia:

$> netstat -lptun | grep 1099 

Ta komenda nic nie pokazuje, że port nie jest otwarty (z ActiveMQ uruchomiony). Oznacza to, że mimo uruchomienia ActiveMQ, nie nasłuchuje żadnych połączeń JMX (w ten sposób skrypt będzie próbował go zatrzymać). Po pewnym rozejrzeniu się znalazłem ten link, który zaprowadził mnie do pliku {ACTIVEMQ_HOME} /conf/activemq.xml. W tym pliku znajduje się następujący rozdział:

<!-- 
    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> 

Ustawianie createConnector = „true” rozwiązany moje problemy (to będzie uruchomić serwer MBean w JVM kiedy zaczyna ActiveMQ). Wyjście shutdown teraz wygląda następująco (zgodnie z oczekiwaniami):

... 
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 

Dodatkowo po zmianie tej flagi mogę sprawdzić, czy domyślny port JMX (1099) jest otwarty po rozpoczęciu ActiveMQ

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