Skip to end of metadata
Go to start of metadata

JMX

Apache ActiveMQ has extensive support for JMX to allow you to monitor and control the behavior of the broker via the JMX MBeans.

Using JMX to monitor Apache ActiveMQ

You can enable/disable JMX support as follows...

1. Run a broker setting the broker property useJmx to true (enabled by default) i.e.

For xbean configuration

2. Run a JMX console

3. The ActiveMQ broker should appear in the list of local connections, if you are running JConsole on the same host as ActiveMQ.


JMX remote access

Remote connections to JMX are not enabled by default in the activemq.xml for security reasons. Please refer to Java Management guide to configure the broker for remote management.

 

Using the Apache ActiveMQ version on OS X it appears as follows:


 

ActiveMQ MBeans Reference

For additional references provided below is a brief hierarchy of the mbeans and a listing of the properties, attributes, and operations of each mbeans.

 Mbean Type

Properties / ObjectName 

Attributes 

Operations 

 Broker

  • type=Broker
  • brokerName=<broker identifier>
  • BrokerId
  • TotalEnqueueCount
  • TotalDequeueCount
  • TotalConsumerCount
  • TotalMessageCount
  • TotalConnectionsCount
  • TotalConsumerCount
  • TotalProducerCount
  • MemoryLimit
  • MemoryPercentUsage
  • StoreLimit
  • StorePercentUsage
  • start
  • stop
  • terminateJVM
  • resetStatistics
  • gc

 Destination

  • type=Broker
  • brokerName=<name of broker>
  • destinationType=Queue|Topic
  • destinationName=<name>
  • AverageEnqueueTime
  • ConsumerCount
  • DequeueCount
  • EnqueueCount
  • ExpiredCount
  • InFlightCount
  • MemoryLimit
  • MemoryPercentUsage
  • Name
  • QueueSize (queues only)
  • browseMessages
  • gc
  • purge
  • resetStatistics

 NetworkConnector

  • type=Broker
  • brokerName=<name of broker>
  • connector=networkConnectors
  • networkConnectorName=<connector identifier>
  • Name
  • Duplex
  • DynamicOnly
  • BridgeTempDestinations
  • ConduitSubscriptions
  • DecreaseNetworkConsumerPriority
  • DispatchAsync
  • DynamicOnly
  • NetworkTTL
  • Password
  • PrefetchSize
  • start
  • stop

 Connector

  • type=Broker
  • brokerName=<name of broker>
  • connector=clientConnectors
  • ConnectorName=<connector identifier>
  • StatisticsEnabled
  • start
  • stop
  • resetStatistics
  • enableStatistics
  • disableStatistics
  • connectionCount

 Connection

  • type=Broker
  • brokerName=<name of broker>
  • connectionViewType=clientId
  • connectionName=<connection identifier>
  • DispatchQueueSize
  • Active
  • Blocked
  • Connected
  • Slow
  • Consumers
  • Producers
  • RemoteAddress
  • UserName
  • ClientId
  • start
  • stop
  • resetStatistics

  PersistenceAdapter

  • type=Broker
  • brokerName=<broker name>
  • Service=PersistenceAdapter
  • InstanceName=<adapter identifier>
  • Name
  • Size
  • Data
  • Transactions

 

 Health

  • type=Broker
  • brokerName=<broker name>
  • Service=Health
  • CurrentStatus
  • health

Command line utilities are also available to let you monitor ActiveMQ. Refer to ActiveMQ Command Line Tools Reference for usage information.

JMX API is also exposed via REST management API

Password Protecting the JMX Connector

(For Java 1.5+)

1. Make sure JMX is enabled, but tell ActiveMQ not create its own connector so that it will use the default JVM JMX connector.

2. Create access and password files

conf/jmx.access:

conf/jmx.password:

(Make sure both files are not world readable - more info can be find here to protect files)

For more details you can see the Monitoring Tomcat Document

3. Modify the "activemq" startup script (in bin) to enable the Java 1.5+ JMX connector

Find the "ACTIVEMQ_SUNJMX_START=" line and change it too the following: (note that in previous versions of ActiveMQ this property was called SUNJMX in some scripts.  As of v5.12.0 all scripts use ACTIVEMQ_SUNJMX_START):

This could be set in /etc/activemq.conf instead (if you have root access):

4. Start ActiveMQ

You should be able to connect to JMX on the JMX URL

And you will be forced to login.

Selective MBean registration

In situations where you need to scale your broker to large number of connections, destinations and consumers it can become very expensive to keep JMX MBeans for all those objects. Instead of turning off JMX completely, starting with 5.12.0, you can selectively suppress registration of some types of MBeans and thus help your broker scale, while still having a basic view of the broker state.

For example, the following configuration will exclude all dynamic producers, consumers, connections and advisory topics from registering their MBeans

 

ManagementContext Properties Reference

Property Name

Default Value

Description

useMBeanServer

true

If true then it avoids creating a new MBean server if a MBeanServer has already been created in the JVM

jmxDomainName

org.apache.activemq

The jmx domain that all objects names will use

createMBeanServer

true

If we should create the MBeanServer is none is found.

createConnector

false

Please refer to Java Management guide to configure the server for remote management and lock down the endpoint serialisation with an appropriate jdk.serialFilter

connectorPort

1099

The port that the JMX connector will use

connectorHost

localhost

The host that the JMX connector and RMI server (if rmiServerPort>0) will use

rmiServerPort

0

The RMI server port, handy if port usage needs to be restricted behind a firewall

connectorPath

/jmxrmi

The path that JMX connector will be registered under

findTigerMBeanServer

true

Enables/disables the searching for the Java 5 platform MBeanServer

suppressMBean

 List of MBean name patters to ignore
  • No labels