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POTomcat JMX connection - Authentication failed
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  1. POTomcat JMX connection - Authentication failed
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    copied!<p>I am having some problems setting up Tomcat for JMX. I added the following properties to</p> <pre><code> CATALINA_OPTS="-Dcom.sun.management.jmxremote.port=18070 -Dcom.sun.management.jmxremote.password.file=$CATALINA_BASE/conf/jmxremote.password -Dcom.sun .management.jmxremote.ssl=false" </code></pre> <p>And have added the jmxremote.password file in to the conf directory. I wrote a client tool that connects to the JMX server running on port 18070. When i run the client program i get the following error. </p> <pre><code> Exception in thread "main" java.lang.SecurityException: Authentication failed! Credentials required at com.sun.jmx.remote.security.JMXPluggableAuthenticator.authenticationFailure(JMXPluggableAuthenticator.java:193) at com.sun.jmx.remote.security.JMXPluggableAuthenticator.authenticate(JMXPluggableAuthenticator.java:145) at sun.management.jmxremote.ConnectorBootstrap$AccessFileCheckerAuthenticator.authenticate(ConnectorBootstrap.java:185) at javax.management.remote.rmi.RMIServerImpl.doNewClient(RMIServerImpl.java:213) at javax.management.remote.rmi.RMIServerImpl.newClient(RMIServerImpl.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305) at sun.rmi.transport.Transport$1.run(Transport.java:159) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:155) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) at java.lang.Thread.run(Thread.java:619) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255) at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142) at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source) at javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2312) at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:277) at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248) at com.bt.c21sc.c21tkprobe.accessors.C21TkProbeJmxDAO.connect(Unknown Source) at com.bt.c21sc.c21tkprobe.service.C21TkProbeBD.execute(Unknown Source) at com.bt.c21sc.c21tkprobe.C21AppserverProbe.main(Unknown Source) </code></pre> <p>If i change the CATALINA_OPTS properties to </p> <pre><code>CATALINA_OPTS="-Dcom.sun.management.jmxremote.port=18070 -Dcom.sun.management.jmxremote.password.file=$CATALINA_BASE/conf/jmxremote.password -Dcom.sun .management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false" </code></pre> <p>Then it works fine. I think what i am confused of is what is classed as remote access. I am running the client program away from the Tomcat instance but both Tomcat and the client tool are on the same machine (i.e. different virtual machines but same environemnt). I thought i had to configure the remote authentication if i access the JMX server remotely from a different machine. </p> <p>By remote access do they mean accessing the JMX server from any VM either locally or remotely? </p> <h2>Edit</h2> <p>Thanks. I found out that the problem was that even though i was supplying the username and password in the jmxremort.password and jmxremote.access files i still had to supply the username and password from the client. </p> <p>You are right that i dont have to supply the user credentials if run locally. I have proved this as i can access the Tomcat's JVM via Jconsole. </p> <p>I am accessing it programmatically so i have to supply a URL which is shown below service:jmx:rmi:///jndi/rmi://localhost:9004/jmxrmi</p> <p>I then get the jmx server as shown below. </p> <pre><code>url = new JMXServiceURL(urlString); Hashtable&lt;String, String[]&gt; env = new Hashtable&lt;String, String[]&gt;(); String[] credentials = new String[] {user,pass}; env.put(JMXConnector.CREDENTIALS, credentials); jmxc = JMXConnectorFactory.connect(url,env); mbsc = jmxc.getMBeanServerConnection(); </code></pre> <p>If i am accessing this locally how would i go about this? I know that it dont work locally without the user credentials as that is how i found out that i need to provide. if Jconsole or visualvm can connect to it then there must be a different approach that allows retrieving the Tomcat jmx server without having to supply the port number. </p> <p>The URL includes a port number. If im accessing the JMX server programmatically, how would i access it without having to specify the port number?</p> <p>By the way i am using Tomcat 5.5 and JDK 1.6</p> <p>Thanks</p>
 

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