How do you connect a JMX agent to a Mule 4 project running locally? When I launch JConsole I see two mule-related processes called org.mule.runtime.module.reboot.MuleContainerBootstrap but I cannot connect to either.
I've tried running my project with the following flags and connecting remotely:
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=1096
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.host=localhost
But no luck.
I had no problems connecting to (localhost:1096) using just these properties:
-Dcom.sun.management.jmxremote.port=1096
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
JConsole gave me a warning about the insecure connection (no SSL). I accepted to connect insecurely and that was enough.
However when adding -Dcom.sun.management.jmxremote.host=localhost is keeps failing to connect. This looks like a Java issue.
If you only want to ensure local connections you can replace it with -Dcom.sun.management.jmxremote.local.only=true which should give you the expected result.
Having said that, this is all a pure Java JMX topic. Mule 4 doesn't expose any MBeans over JMX like Mule 3 did so there is no specific reason to connect with JMX.
I'm not sure why you are using jconsole given that VisualVM is a much modern and powerful alternative, unless you are just testing the local JMX connectivity ;-)
Related
I’m trying to connect my database mysql (RDS Aurora serverless) and Mulesoft. But I have to setup an SSH tunnel with an EC2 instance (AWS restrictions) So I try an ssh connection from Mulesoft to my EC2 instance, all tutorials I have found talk about sshmultiplexedconnector or SSH Connecter - Mule 3, and they seems to be deprecated.
Did you had the same problems, and do you have solutions or other methods ?
PS, I’m using : Mule server 4.2.0 Anypoint Studio 7.3.4 EC2 instance run Ubuntu 18.04
Tutorial : https://blogs.mulesoft.com/dev/connectivity-dev/mule-in-a-shell-new-ssh-connector/
Thanks and regards.
mule-code
mule-error
There is no out of the box connector for Mule 4 that implements an SSH tunnel. The connector you mentioned is for Mule 3, so it is not compatible, and hasn't been maintained for some years. You could attempt to build a connector for Mule 4 to do it, however I would argue that a communication tunnel, same as a VPN, is task better implemented at the server level. Just do it from your operating system and to the Mule application it should be transparent.
what is the best way to monitor the Mule ESB instances. Is there a way i can get alerted when my mule instance goes down for some reason. I have 4 instances of Mule running and how will I come to know if 1 of them got down due to some reason.
Thanks!
I assume you are running community edition? (Enterprise edition provides a Management Console which allows you to define alerts). If you are using CE, then you are able to enable JMX monitoring on the instances and then use one of many ways to verify based on JMX info, whether your server is running. One way is to write your own application that retrieves JMX data programmatically and act accordingly.
HTH
If you are using Mule EE, you can use MMC to monitor all your instances as Gabriel has already suggested. My suggestion would be to install MMC inside tomcat on a separate server. This is to ensure that even if your Mule Server crashes or goes down, your MMC is still running and can send you alerts about your Mule server downtime. You can refer below link for details on how to setup server down and up alerts.
https://developer.mulesoft.com/docs/display/current/Working+With+Alerts
Additionally I would recommend to use MMC with database persistence to ensure you have ability to recover MMC workspace even if your MMC server crashes. You can refer about MMC setup with DB persistence at below link.
https://developer.mulesoft.com/docs/display/current/Configuring+MMC+for+External+Databases+-+Quick+Reference
If you don't have Mule EE, you may want to explore other tools or customer alerting applications as suggested by Gabriel.
HTH
You can set up a JMX agent by adding the following lines into your "conf/wrapper.conf" file :
wrapper.java.additional.19=-Dcom.sun.management.jmxremote
wrapper.java.additional.20=-Dcom.sun.management.jmxremote.port=10055
wrapper.java.additional.21=-Dcom.sun.management.jmxremote.authenticate=false
wrapper.java.additional.22=-Dcom.sun.management.jmxremote.ssl=false
wrapper.java.additional.23=-Djava.rmi.server.hostname=127.0.0.1
don't forget to change the values accordingly. Also you can implement SSL authentication with a few extra lines.
Now once your monitoring platform is set up you can always activate Java pollers and start the server.
i'm trying to get JMX monitoring to work on a Mule 3.7 CE server.
I've got a flow with
<management:jmx-server >
<management:connector-server url="service:jmx:rmi:///jndi/rmi://my-server:1099/server" rebind="false" />
</management:jmx-server>
when i deploy the app it get this error
Failed to deploy artifact 'jmx_ce37', see below +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ org.mule.module.launcher.DeploymentInitException:
RegistrationException: More than one object of type class
org.mule.module.management.agent.AbstractJmxAgent registered but only
one expected. at
org.mule.module.launcher.application.DefaultMuleApplication.init(DefaultMuleApplication.java:197)
~[?:?]
I would assume that there's already some jmx process running; but i didn't enable it, and i don't know how to connect to it. There are no processes listening on the default jmx port (1096) on this machine.
Any suggestions on what to do to use jmx with Mule3.7CE ?
Mule server already provides indeed a JMX server with basic statistics around the server and the applications, please try and use a different port if the default out-of-the-box behaviuor does not work for you.
I have a requirement to write a java program to remotely start stop a jboss server on request. Can anyone please suggest how could it be done? One option could be invoke start/stop script but this java program(may be servlet or jsp) exists on different machine. We are using jboss server 7.
A simple method to start and stopping Jboss remotely can be done with the run.sh and shutdown.sh script, by pointing to the right host and port. If you are on Linux you can run:
rsh user#host /path/to/jboss/bin/run.sh
rsh user#host /path/to/jboss/bin/shutdown.sh
You can also execute a Shell command with Java, you can use Runtime exec mewthod:
Runtime.getRuntime().exec("shell command here");
See this complete answer for more details on Java exec method.
A better alternative I would suggest, is to use JMX-console programmatically, you can stop/restart a Jboss intance by invoking the shutdown method on the Server MBean. JMX approach is more powerful because you can monitor and manage every aspect of the Jboss runinng instanace (like logging, memory or cpu). See this to start.
I've created a snippet to ease your start, see this working solution http://snipt.org/Ahhjh4
Remember:
create a Jboss user on the Jboss instance using add-user.sh (JBOSS_HOME/bin)
include the jboss-client.jar in your client class-path (the jar is in JBOSS_HOME/bin/client)
Good luck!
I am kind of new to JMX , Here I am trying to use jconsole provided by jdk to remotely read the MBeans of JBOSS EAP 6. I followed tutorial ,http://magnus-k-karlsson.blogspot.in/2013/01/how-to-remote-connect-jconsole-to-jboss.html with this I am able to read remotely with the jconsole provided by eap 6 (EAP6_HOME)/bin/jconsole.sh ,but I was not able to do the same with jconsole of jdk ? Please give your thought on this. I suspect it may be due to the remoting-jmx protocol of the (service:jmx:remoting-jmx://192.168.0.3:9999 ) jmx remote url. Does jboss-eap6 support rmi(service:jmx:rmi:///jndi/rmi://ipadress/mbeanname) protocol to read MBeans in jconsole?
Thanks,
Leo.
By default, there will be a MBeans tab in the window of jconsole when connected as :
service:jmx:remoting-jmx://jbossHost:9999
To be able to use remoting-jmx protocol you need to have jboss-client.jar or jboss-cli-client.jar on the JConsole classpath.
Here is the relevant part from jconsole.sh provided by JBoss:
CLASSPATH=$JAVA_HOME/lib/jconsole.jar
CLASSPATH=$CLASSPATH:$JAVA_HOME/lib/tools.jar
CLASSPATH="$CLASSPATH:$JBOSS_HOME/bin/client/jboss-cli-client.jar"
$JAVA_HOME/bin/jconsole -J-Djava.class.path="$CLASSPATH" "$#"
P.S. You might need to create some user account first. See $JBOSS_HOME/bin/add-user.sh