Novell-activemq won't start - java.net.UnknownHostException

Activemq won’t start

ERROR BrokerService - Failed to resolve localhost

/var/log/activemq/activemq.stdout2 shows:

ERROR BrokerService - Failed to start ActiveMQ JMS Message Broker. Reason: java.io.IOException: Transport Connector could not be registered in JMX: Failed to bind to server socket: tcp://127.0.0.1:61616 due to: java.net.UnknownHostException: *: *: Name or service not known

At console see the following exception when novell-activemq attempt to start:

org.apache.activemq.util.IdGenerator <clinit>

WARNING: could not generate unique stub

java.net.UnknownHostException: *: *: Name or service not known

...

Ensure a host enty exists for the Access Gateway's primary IP Address and hostname.

Note: If Access Gateway Appliance, modify the /etc/hosts and then ensure that /etc/init.d/novell-activemq will start
If it starts ok, then ensure to modify the the hosts entry from within the AC Gui -> Devices -> Access Gateway -> Edit Cluster -> Hosts

Otherwise, as soon as any config change is made the hosts file will get over-written and will result with the same problem.

Hosts enty doesn't exist, so when activemq fails with host not found exception.

In customer's case the AG's hostname was lag1anx

Their /etc/hosts file just had the following uncommented line:

127.0.0.1     localhost

The full excetion from the /var/log/activemq/activemq.stdout2  looked like this:

ACTIVEMQ_HOME: /opt/novell/activemq
ACTIVEMQ_BASE: /opt/novell/activemq
Loading message broker from: xbean:activemq.xml
ERROR BrokerService                  - Failed to resolve localhost
INFO  BrokerService                  - Using Persistence Adapter: AMQPersistenceAdapter(/var/opt/novell/activemq)
INFO  BrokerService                  - ActiveMQ 5.1.0 JMS Message Broker (localhost) is starting
INFO  BrokerService                  - For help or more information please see: http://activemq.apache.org/
INFO  AMQPersistenceAdapter          - AMQStore starting using directory: /var/opt/novell/activemq
INFO  KahaStore                      - Kaha Store using data directory /var/opt/novell/activemq/kr-store/state
INFO  AMQPersistenceAdapter          - Active data files: []
INFO  KahaStore                      - Kaha Store using data directory /var/opt/novell/activemq/kr-store/data
ERROR BrokerService                  - Failed to start ActiveMQ JMS Message Broker. Reason: java.io.IOException: Transport Connector could not be registered in JMX: Failed to bind to server socket: tcp://127.0.0.1:61616 due to: java.net.UnknownHostException: lag1anx: lag1anx: Name or service not known
java.io.IOException: Transport Connector could not be registered in JMX: Failed to bind to server socket: tcp://127.0.0.1:61616 due to: java.net.UnknownHostException: lag1anx: lag1anx: Name or service not known
	at org.apache.activemq.util.IOExceptionSupport.create(IOExceptionSupport.java:27)
	at org.apache.activemq.broker.BrokerService.registerConnectorMBean(BrokerService.java:1395)
	at org.apache.activemq.broker.BrokerService.startTransportConnector(BrokerService.java:1848)
	at org.apache.activemq.broker.BrokerService.startAllConnectors(BrokerService.java:1801)
	at org.apache.activemq.broker.BrokerService.start(BrokerService.java:455)
	at org.apache.activemq.xbean.XBeanBrokerService.afterPropertiesSet(XBeanBrokerService.java:50)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1288)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1257)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:438)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:383)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:353)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:245)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:169)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:242)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:400)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:736)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:369)
	at org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicationContext.java:64)
	at org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicationContext.java:52)
	at org.apache.activemq.xbean.XBeanBrokerFactory.createApplicationContext(XBeanBrokerFactory.java:96)
	at org.apache.activemq.xbean.XBeanBrokerFactory.createBroker(XBeanBrokerFactory.java:52)
	at org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:71)
	at org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:54)
	at org.apache.activemq.console.command.StartCommand.startBroker(StartCommand.java:111)
	at org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:73)
	at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
	at org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:129)
	at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)
	at org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:79)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.activemq.console.Main.runTaskClass(Main.java:222)
	at org.apache.activemq.console.Main.main(Main.java:106)
Caused by: java.io.IOException: Failed to bind to server socket: tcp://127.0.0.1:61616 due to: java.net.UnknownHostException: lag1anx: lag1anx: Name or service not known
	at org.apache.activemq.util.IOExceptionSupport.create(IOExceptionSupport.java:33)
	at org.apache.activemq.transport.tcp.TcpTransportServer.bind(TcpTransportServer.java:124)
	at org.apache.activemq.transport.tcp.TcpTransportFactory.doBind(TcpTransportFactory.java:60)
	at org.apache.activemq.transport.TransportFactory.bind(TransportFactory.java:123)
	at org.apache.activemq.broker.TransportConnector.createTransportServer(TransportConnector.java:293)
	at org.apache.activemq.broker.TransportConnector.getServer(TransportConnector.java:135)
	at org.apache.activemq.broker.TransportConnector.asManagedConnector(TransportConnector.java:98)
	at org.apache.activemq.broker.BrokerService.registerConnectorMBean(BrokerService.java:1389)
	... 35 more
Caused by: java.net.UnknownHostException: lag1anx: lag1anx: Name or service not known

After adding 

<ipaddress>   lag1anx

or modifying the existing line to :

127.0.0.1    localhost lag1anx

novell-activemq started fine.