Regarding connection to JNDI using Local host

[Former Member]

Hi,

I would really appreciate, if you could provide some help to connect to localhost.

I have 6.40 and I am writing a simple EJB module using nwds with hello message.

The following things have been set up.

1. Loop back adapter 10.10.0.10

2. In the host file I have put an entry 10.10.0.10 WJDSOUZA

3. In the NWDS message serverhost localhost port 3601.

4. the NWDS show j2ee engine shows all green ( sdm.dispatcher,server)

The following java gives me JNDI error

System.out.print("\nInitializing JNDI properties ... ");

Properties jndiCtxProp = new java.util.Properties();

jndiCtxProp.put(Context.INITIAL_CONTEXT_FACTORY,

"com.sap.engine.services.jndi.InitialContextFactoryImpl");

jndiCtxProp.put(Context.PROVIDER_URL, "WJDSOUZA:3601");

System.out.print("done");

System.out.print("\nInstantiating JNDI Context ... ");

Context jndiCtx = new InitialContext(jndiCtxProp);

System.out.print("done");

The error is

Initializing JNDI properties ... done

Instantiating JNDI Context ... com.sap.engine.services.jndi.persistent.exceptions.NamingException: Exception while trying to get InitialContext. [Root exception is com.sap.engine.interfaces.cross.DestinationException: cannot establish connection with any of the available instances:

WJDSOUZA:3601 Reason: Cannot open connection on host: 10.10.0.10 and port: 3601]

at com.sap.engine.services.jndi.InitialContextFactoryImpl.getInitialContext(InitialContextFactoryImpl.java:455)

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.ibm.training.ejb.test.go(test.java:47)

at com.ibm.training.ejb.test.main(test.java:25)

Caused by: com.sap.engine.interfaces.cross.DestinationException: cannot establish connection with any of the available instances:

WJDSOUZA:3601 Reason: Cannot open connection on host: 10.10.0.10 and port: 3601

at com.sap.engine.interfaces.cross.Destination.getNextAvailableBroker(Destination.java:53)

at com.sap.engine.interfaces.cross.Destination.getRemoteBroker(Destination.java:33)

at com.sap.engine.services.jndi.InitialContextFactoryImpl.getInitialContext(InitialContextFactoryImpl.java:340)

... 6 more

[Former Member · Accepted solution]

Go to command prompt. try to establish a conenction to the host WJDSOUZA on port 3601 using telnet. i.e. <b>telnet WJDSOUZA 3601</b>

if this goes through then you dont have any network issues.

check if you have proxy settings turned on for NWDS. this can be checked in

Window>Preferences>Workbench-->Proxy Settings.

[Former Member]

1. Created MS loopback adapter ip 10.10.0.10 The firewall was blocking the connectivity.

2. the file hosts should have an entry 10.10.0.10 <hostname>

3. check the connectivity to this ip address

as suggested by Amol and Vladamir to check the network. go to Run enter cmd (ms-dos) and enter telnet <HOSTNAME> 50004 must be connected.

4. check J2EE in nwds. hosts localhost port 3601. all SDM,dispatcher should be green

[Former Member]

Amol,

I think I have fixed the problem. I am able to run the client application.

Could you let me know VA's exe file name.

thanks

[Former Member]

if you are on windows then go.bat is the name of VA script.

it is found in

usr/sap/<SID>/.../j2ee/admin

[Former Member]

Amol and Vladamir

The initial problem is now resolved. The network working.

I pinged and telnet WJDSOUZA 50004 -- it's connect.

Thanks to your immense help and tip. I give both full points.

Since, I am new, I am struggling to get going. I need your help

1. In local WAS what is VA's exe name

2. After connecting to the network the, the code below gives me an error. I checked everything and unable trace the problem.

jndiCtxProp.put(Context.PROVIDER_URL, "WJDSOUZA:50004");

System.out.print("done");

System.out.print("\nInstantiating JNDI Context ... ");

Context jndiCtx = new InitialContext(jndiCtxProp);

System.out.print("done");

System.out.print("\nAccessing Bean's Home Interface with JNDI lookup ... ");

Object obj =(Object) jndiCtx.lookup("ibm.com/ExDSSimpleEjbApp_01/HelloEJBBean");

System.out.print("done");

Initializing JNDI properties ... done

Instantiating JNDI Context ... done

Accessing Bean's Home Interface with JNDI lookup ... com.sap.engine.services.jndi.persistent.exceptions.NameNotFoundException: Path to object does not exist at ibm.com, the whole lookup name is ibm.com/ExDSSimpleEjbApp_01/HelloEJBBean.

at com.sap.engine.services.jndi.implserver.ServerContextImpl.getLastContainer(ServerContextImpl.java:258)

--- more erros

[Former Member]

Thank you Amol and Vladamir.

Amol, telnet WJDSOUZA 3601 could not connect. So network problem. What could be the reason, can you please provide some help to fix this.

I have the following in hosts file

127.0.0.1 localhost

#NWSABAP

10.10.0.10 WJDSOUZA

Microsoft Loopback Adapter - The status is enabled.

TCP/IP address 10.10.0.10

Vladamir,

Your tip is important and appreciated. I will reply to you by tomorrow.

Thank you both and good night.

[Former Member]

william,

as mentioned by vladimir, for connecting to your JNDI service for lookup, you need to connect to your P4 port...if you need to find out the P4 port then

Start / Log on to Visual administrator.

Go to Server / Services / P4 Provider.

In the right pane you will see Info tab where the Remote Port is mentioned.

-- Amol

[Vlado]

Hi William,

When creating the InitialContext you should give the p4 port, not the message server port, e.g.

jndiCtxProp.put(Context.PROVIDER_URL, "localhost:50004");

Check <a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/0736159e-0301-0010-9ea4-c63d83d0797b">this</a> article.

HTH!

-Vladimir