on 06-27-2005 4:50 PM
Hi there,
I'm trying to get an external JMX client to connect to a SAP Web AS ABAP+Java 640 (Unicode, SP 9).
My first problem was that I couldn't find the file
client.jar as written in "Compile and Run your Client" of
the JMX Service Interface documentation. I could solve the
"class not found" problems by using sapj2eeclient.jar, so
I think the file has just been renamed.
I then tried to run the following code, which has been
taken more or less from the "Connecting to an MBeanServer"
example.
import java.util.Properties;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.naming.Context;
import com.sap.jmx.ObjectNameFactory;
import com.sap.jmx.remote.JmxConnectionFactory;
public class Client {
public Client(
) {
}
private void run(
) {
try {
Properties props = new Properties();
props.setProperty(Context.INITIAL_CONTEXT_FACTORY, "com.sap.engine.services.jndi.InitialContextFactoryImpl");
props.setProperty(Context.SECURITY_PRINCIPAL, "J2EE_ADMIN");
props.setProperty(Context.SECURITY_CREDENTIALS, "password");
props.setProperty(Context.PROVIDER_URL, "my-server:50004");
MBeanServerConnection mbsc = null;
mbsc = JmxConnectionFactory.getMBeanServerConnection(
JmxConnectionFactory.PROTOCOL_ENGINE_P4, props);
String path = "Root/Services/Memory/AllocatedMemory";
ObjectName name = null;
name = ObjectNameFactory.getNameForMonitorPerNode(
ObjectName.quote(path), null, null);
System.out.println("ObjectName: " + name.getCanonicalName());
Integer value = (Integer)mbsc.invoke(name, "getValue", null, null);
System.out.println("Value: " + value);
}
catch(Exception ex) {
ex.printStackTrace();
}
}
public static void main(
String[] args
) {
new Client().run();
}
}
Unfortunately, I get the following error:
com.sap.engine.services.jmx.exception.JmxConnectorException: Unable to connect to connector server.
at com.sap.engine.services.jmx.connector.p4.P4ConnectorClient.<init>(P4ConnectorClient.java:96)
at com.sap.engine.services.jmx.connector.p4.ConnectorFactory.getJmxConnector(ConnectorFactory.java:31)
at com.sap.jmx.remote.JmxConnectionFactory.getConnector(JmxConnectionFactory.java:191)
at com.sap.jmx.remote.JmxConnectionFactory.getMBeanServerConnection(JmxConnectionFactory.java:92)
at Client.run(Client.java:29)
at Client.main(Client.java:51)
Caused by: com.sap.engine.services.jndi.persistent.exceptions.NamingException: Exception while trying to get InitialContext. [Root exception is com.sap.engine.services.security.exceptions.BaseLoginException: Cannot create new RemoteLoginContext instance.]
at com.sap.engine.services.jndi.InitialContextFactoryImpl.getInitialContext(InitialContextFactoryImpl.java:538)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.init(InitialContext.java:219)
at javax.naming.InitialContext.<init>(InitialContext.java:195)
at com.sap.engine.services.jmx.connector.p4.P4ConnectorClient.<init>(P4ConnectorClient.java:69)
... 5 more
Caused by: com.sap.engine.services.security.exceptions.BaseLoginException: Cannot create new RemoteLoginContext instance.
at com.sap.engine.services.security.remote.login.RemoteLoginContext.<init>(RemoteLoginContext.java:98)
at com.sap.engine.services.jndi.implclient.LoginHelper.clientSideLogin(LoginHelper.java:78)
at com.sap.engine.services.jndi.InitialContextFactoryImpl.getInitialContext(InitialContextFactoryImpl.java:402)
... 10 more
Caused by: java.lang.NullPointerException
at com.sap.engine.services.security.remote.RemoteSecurity_Stub.getRemoteLoginContext(RemoteSecurity_Stub.java:678)
at com.sap.engine.services.security.remote.login.RemoteLoginContext.<init>(RemoteLoginContext.java:93)
... 12 more
Am I doing something wrong? Any help or hint would be
greatly appreciated.
Regards, Bernd
Hello,
I reviewed the links you posted and they do provide the best information SAP has available.
The link to the the forum post is somewhat relevant - though it appears for an internal JMX Client to register an MBean. There is no code posted, only the error message and some xml config for a local J2EE application. What isn't disucssed in the post is how to monitor or query that bean. Again, I am working on an external JMX Client.
The SAP Help Documentation for 630 almost worked! I got the same error message however and was given warnings by NetWeaver Developer Studio the methods were deprecated. I am using 700 NW04S. Here is where the 630 documentation differed:
MBeanServerConnection mbsc =
JmxClientFactory.getJmxClient().getMBeanServerConnection
(P4ConnectorClient.ADDRESS_PREFIX, connectionProperties);
The PDF link is a copy of the SAP Help Documentation for version 700. An excerpt from the article:
import java.util.Properties;
import javax.naming.Context;
import com.sap.jmx.remote.JmxConnectionFactory;
...
// set the connection properties for the RMI-P4 connection
Properties connectionProperties = new Properties();
connectionProperties.setProperty(Context.INITIAL_CONTEXT_FACTORY,
"com.sap.engine.services.jndi.InitialContextFactoryImpl");
connectionProperties.setProperty(Context.PROVIDER_URL, "<hostname>:<
p4-port>");
connectionProperties.setProperty(Context.SECURITY_PRINCIPAL, "<username>");
connectionProperties.setProperty(Context.SECURITY_CREDENTIALS,
"<password>");
// create the MBeanServerConnection
MBeanServerConnection mbsc =
JmxConnectionFactory.getMBeanServerConnection(JmxConnectionFactory.
PROTOCOL_ENGINE_P4, connectionProperties);
This is what based my above code on. The documentation states this is what is needed to create a connection to the MBean Server. There is a final note:
If you are either accessing a local MBeanServer from an application, or using
the RMI-P4 JMX Connector, you have to be logged in with a user in the default
administrator role.
I am following this article exactly, as I have used the Admin user for the Java AS. This user is in the Administrators group, has the Administrator role - as well Content Admin, System Admin and User admin. Becuase of this, I don't think this is a permission issue.
I have also tried this from a Portal Abstract Component, (internal JMX Client) and get similar results:
java.rmi.RemoteException: unable to create connector; nested exception is: java.lang.ClassCastException
Thanks!
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Hello,
I am working on a similar JMX External Client to pull data from the monitoring service. I am running into a similar error. Am I perhaps missing an import? If any of you could share your work on how to get a valid p4 connection/MBeanServerConnection that would be much appreciated.
import java.util.*;
import javax.naming.Context;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import com.sap.jmx.ObjectNameFactory;
import com.sap.jmx.remote.JmxConnectionFactory;
public class JMXProgram {
public static void main(String[] args) {
System.out.println(" Class execution started");
try {
Properties connectionProperties = new Properties();
connectionProperties.setProperty(Context.INITIAL_CONTEXT_FACTORY,"com.sap.engine.services.jndi.InitialContextFactoryImpl");
connectionProperties.setProperty(Context.PROVIDER_URL, "<hostname>:<p4_port>");
connectionProperties.setProperty(Context.SECURITY_PRINCIPAL, "<username>");
connectionProperties.setProperty(Context.SECURITY_CREDENTIALS, "<password>");
System.out.println(JmxConnectionFactory.PROTOCOL_ENGINE_P4);
MBeanServerConnection mbsc = JmxConnectionFactory.getMBeanServerConnection(JmxConnectionFactory.PROTOCOL_ENGINE_P4, connectionProperties);
System.out.println("Made it this far");
String path = "/Root/Services/Memory/AllocatedMemory";
ObjectName name = null;
name = ObjectNameFactory.getNameForMonitorPerNode(ObjectName.quote(path), null, null);
System.out.println("ObjectName: " + name.getCanonicalName());
Integer value = (Integer)mbsc.invoke(name, "getValue", null, null);
System.out.println("Value: " + value);
}
catch (Exception e) {
System.out.println("Exception caught!");
//System.out.println(e.getMessage());
System.out.println(e.toString());
}
System.out.println(" Class execution complete");
}
}
Here is the output of the program:
Class execution started
service:jmx:com.sap.engine.services.jmx.connector.p4:
Exception caught!
com.sap.engine.services.jmx.exception.JmxConnectorException: Unable to connect to connector server.
Class execution complete
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hi Justin,
check this might help full to u
http://nanobitinc.com/education/training/SAP/NetWeaver/Monitoring%20and%20Management.pdf
http://help.sap.com/saphelp_webas630/helpdata/en/64/617cfb94845d468b0498b4b2c53d74/content.htm
let me know am i reached ur destiny
bvr
Edited by: bvr on Apr 20, 2009 7:50 AM
You guys have wrong key.
Should change the key to "/Services/Memory/AllocatedMemory".
Have a fun.
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Hello Madhu,
i have the same problems too! - Can you email me your code to my e-mail-adress: ralf.steffens@t-systems.com ?
Thanks in advance.
Best Regards,
Ralf
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Hello Madhu,
i have the same problems too! - Can you email me your code to my e-mail-adress: ralf.steffens@t-systems.com ?
Thanks in advance.
Best Regards,
Ralf
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Hi Vladimir
thanks for your reply.
The real server name is called sap-640-sapdb and I called with the correct server name
(I have just changed password and server in the example code).
It was up and running, of course.
I could make it work, but only if my Client class is running localy on sap-640-sapdb.
I could not make it work to run remotely from my PC. I get the exception:
Caused by: java.rmi.ServerException: The server, that the client is connected with, isn't working.
The object is not redirectable!
Meanwhile I have installed a complete SAP NetWeaver Dev. Environment on my PC.
I get exactly the same error message, when I want to connect with Visual Administrator installed with the J2EE instance on my Windows PC to the J2EE instance running on the Linux box sap-640-sapdb.
Isn't it possible to use P4 protocol remotely?
Thanks, Bernd
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Hi Bernd
I am successful in using a JMX client remotely for logging the HTTP session data from SAP WebAS 710 release. I have done this in the context of monitoring the number of HTTP sessions to correlate with Memory utilized on WebAS.
The piece of code that I wrote is more or less similar to what you posted in the thread here.
If you would like to have a look at it, just let me know so that I can mail it to your id.
Thanks and Regards
Madhu
Hi Bernd,
First, you have figured it out about the sapj2eeclient.jar - congratulations The reason for the current problem could be that your Web AS Java is not running. Please check that you have specified the correct connection parameters (my-server:50004) and that the server there is up and running.
Best regards,
Vladimir
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