Implementation of session handling for using web services

Hi,
I would like to use session handling in web services using ABAP stack in order to start the session with an user login function followed by other RFC calls till a user logout. So far, I found only the following help note in the SAP online help:
Interface Profile
In the interface profile, choose the required processing type: Stateful or Stateless.
A stateful service retains its status within the framework of a HTTP session throughout several calls form the same service consumer. The standard value for services is Stateless.If you require stateful communication, you can choose this instead.
[http://help.sap.com/saphelp_nwpi71/helpdata/de/45/25291b5a2657c0e10000000a1553f7/content.htm |http://help.sap.com/saphelp_nwpi71/helpdata/en/45/25291b5a2657c0e10000000a1553f7/content.htm]
Please, could someone explain me the further required steps of SAPs session handling idea cause just settting the status to stateful is still not the solution itself...
Regards,
Jens

Now, I found the possible scenarios, suggest by SAP Help, regarding security for Web Services ([http://help.sap.com/saphelp_nw73/helpdata/en/48/8ebbba66be06b2e10000000a42189b/content.htm|http://help.sap.com/saphelp_nw73/helpdata/en/48/8ebbba66be06b2e10000000a42189b/content.htm]):
- SAML & WS SecureConversation -> SSO
- WS Security UsernameToken & WS SecureConversation
- User ID and Password in HTTP Header & HTTPS
- SAP Authentication Assertion Ticket & HTTPS -> SSO
- X.509 SSL Client Certificate through HTTPS
- WS Security: X.509 Certificate Authentication at Message Level
Are scenarios with SSO the solution for creating sessions!?

Similar Messages

Session Pooling for CRMoD - Web services.

Hi,
We have a Java application which fetches the Contact Data on the basis of the Phone Number in CRMoD, using web services. (it happens on a hyperlink click).
Before fetching the contact data, we establish the session between our app and CRMoD using the URL - https://<pod>.crmondemand.com/Services/Integration?command=login.
The jsessionId is retrieved and then used for subsequent interaction with the web services.
However, everytime any user clicks on the hyper link...the entire process is executed right form the connection establishment to fetchng the contact data.
This results in a lot of time for the entire process to execute (roughly around 6-7 seconds).
We would like to reduce the time , possibly by implementing a connection pooling for the login.
Can any one suggest how to implement a sesision pool for the JsessionId that is returned from CRMoD ?
Regards,
Bibin.

You should definitely move to STATELESS web services for this and not STATEFUL. You also get a bit of scalability also.
If you were to pass the SESSIONID around to multiple processes (or one that was threaded), you might still get RIP (ie, concurrency timeouts) errors. By using the STATELESS approach to web services, you get the built in connection pooling plus an automatic handler for concurrency/queueing.
In the STATELESS, all of your processes just supply the USERID/PASSWORD in the call. CRMOD decides whether an existing POOLed connection is used. You actually have to do less in terms of management this way.
We implemented an external facing web application for a client that used a single USERID/PASSWORD to "confirm" an Appointment that was established via STATELESS connections.
Mychal Manie
Hitachi Consulting - Oracle Practice

Session management for a web service

I am building a web service where the user will need to login and the application will need to maintain a persistent session. I am using Apache Axis2 for client/server communication via SOAP/XML. What would the simplest and most common way of doing this? I know I could implement session management from scratch similarly to how a browser does it, using cookies, but I'd rather use standard Java libraries for this. Am I correct in assuming that even though I'm using Axis2, the solution doesn't really have anything to do with Axis2 since Axis2 is basically just a way for the client/server to send messages to each other?
I've read a lot of information online about this, but there's so much information that it's hard to know where to start. Basically I'm just looking for someone to point me in the right direction on what classes to use and so on. I just need a simple username password authentication and session management system for a web service.

Container Managed Authentication. Does everything you need.

Pre-requisites required for using web-services

Hello all!
please tell what are the things required to use siebel on demand web-services.
i have a user-id, password and other than it what all should i have.
i am planning to use web-services to track my leads via my web-site.. can any one please specify what steps should i follow to make it happen..
regards,
Sreekanth

If it will help you, I can send you a small VB.net example program that demonstrates web services. It will be easy to translate into C#. Click on my name to find my email address if you're interested.

Sending and receiving values using web services vi

hi trying to receive values values using the webservices vi 's, but im facing same conversion errors. im sending my project and an image of the problem can anyone help me on this?
Attachments:
TZID.zip ‏21 KB
labviewscrn.JPG ‏126 KB

Hi,
Here is a global tutorial about Web Services :
http://zone.ni.com/devzone/cda/tut/p/id/7350
There are exemples at the end of the document : webservicesdemo.zip
Please check the instruction for using web services given in the Readme.doc, it could be the source of your problem.
Also, mind that you need the same language for you labVIEW version than the one used to create the Web service VIs.
Regards,
Rémi M.
National Instruments France
#adMrkt{text-align: center;font-size:11px; font-weight: bold;} #adMrkt a {text-decoration: none;} #adMrkt a:hover{font-size: 9px;} #adMrkt a span{display: none;} #adMrkt a:hover span{display: block;}
>> Les présentations NIDays 2010 déjà disponibles au téléchargement !

How to get the list of values for a dynamic parameter using Web Services SDK?

I am struggling to get the list of values for a dynamic parameter of a report.I am using Java Web Services SDK ... I tried to use PromptInfo.getLOV().getValues() method but it does not work.First of all ... is this possible (to get the list of values for a dynamic param) using Web Services?Second of all, if this is possible, how should I do it ... it seems it works fine when running the report from CMC. It asks for DB logon info and after that it provides a list of values.Thx 

Your assumption is correct. We are trying to get the LOVs from the Crystal Report. I was not aware that this is not supported by Web Services SDK.We used Web Services SDK to integrated the Crystal Reports in our web application. We implemented some basic actions for reports: schedule, view instances, run ad-hoc reports.We encountered this problem when trying to run/schedule reports with dynamic parameters (a list of values from DB). We were unable to get the LOVs.Please let me know if you can think of an alternative to look at.Thanks a lot,Catalin

Using only one method in session bean to create web service

Hi all,
I hhave a scenario where i am inserting and retrieving data from dict table using web service.
For this i have created a session bean and a wrapper class.
The session bean has two methods: insertRecords(), and viewRec().
so while creating a web service i need to include two methods.
I want to have only one method where i can pass a parameter as operation and if it is "I", then i can call the insert method and if it is "S" i can call view method.
I tried doing that bt i am stuck up with the return type.
Insert method has return type as array of wrapper class and
view method has wrapper class as return type ...
Is this scenario possible..??
or is there any other way to do this???
Plz let me knw..
Thankls n regards,
Ankita

Hi Siddharth,
Im really sorry..
i cudnt get u ..
Actually these r methods:
public DemoDicModel[] viewRecords()
and
public DemoDicModel insertRecords(
          String title,
          String desc,
          String status)
and im trying this:
public DemoDicModel[] getMethods(String operation,String title,String desc, String st)
DemoDicModel[] demoModel =null;
DemoDicModel model = new DemoDicModel();
if(operation == "show")
      demoModel = viewRecords();
if(operation == "ins")
      model = insertRecords(title,desc,st);
      model.setMsg("RECORDS GENERATED");
      demoModel=
return demoModel;
im stuck up with insert operation.
can u plz explain me in detail.
thanks,
ankita

Create a session for a web service in jdeveloper10g

Hi All,
Question 1: How to create a session for a java web service created in jdeveloper10g.
Question 2: How to restrict a particular user for accessing a java web service.
I have done this by using key store. But when creating the java web service client, again we have to configure the key store, which should not happen in my case. Hence i like to create a method for login in a web service, create a session id for the user if he is a valid user and send the session id back to web service client. Using the session id they can access other methods in the web service.
Can any one suggest how I can accomplish this. Thanks in advance.

I don't know this can be disscussed or not.
Please delete my topic if this can't be disscussed here.
Thank you.

Using Identity Management for Securing Web Services

My goal is to associate my services with an Oracle Internet Directory. I made some attempts to set up SAML authentication for the web services, but it didn't have the right outcome.
(My identity management server and OID is up and running and I have successfully made authentication modules for other web applications)
Here is what I did:
1. I wrote a simple java file, used jdeveloper tools to create and deploy it as a web service to OC4J. I associated an identity management server with this service through OC4J web tools as security provider.
2. I made a data control for the web service and put it in an ADF application . (client)
3. I deployed the client project(2) to OC4J.
I could use the web service through the page.
Then
I secured the webservice to expect SAML for authentication.
Surprisingly, the client could still communicate with the webservice, Why? Shouldn't it have rejected the request because of the problem in SAML token? (The proxy and the data control were not secured, and didn't provide any SAML tokens)
4.
I added login page to my client project (through ADF security wizard). It used idenity management for authentication successfully. login process completes and web service data control is displayed.
5. I want the authentication information to be propagated through the page so that the web service receives the data and uses Identity Management.
I know I should add <property name="oracle.security.wss.propagate.identity" value ="true"/>
to one of the configuration files, but don't know where exactly.
Best Regards,
Farbod

It doesnt matter whether the service is invoked as part of your larger process or not, if it is performing any business critical operation then it should be secured.
The idea of SOA / designing services is to have the services available so that it can be orchestrated as part of any other business process.
Today you may have secured your parent services and tomorrow you could come up with a new service which may use one of the existing lower level services.
If all the services are in one Application server you can make the configuration/development environment lot easier by securing them using the Gateway.
Typical probelm with any gateway architecture is that the service is available without any security enforcement when accessed directly.
You can enforce rules at your network layer to allow access to the App server only from Gateway.
When you have the liberty to use OWSM or any other WS-Security products, i would stay away from any extensions. Two things to consider
The next BPEL developer in your project may not be aware of Security extensions
Centralizing Security enforcement will make your development and security operations as loosely coupled and addresses scalability.
Thanks
Ram

Report that uses web services as data source, prompts for database logon

I have a crystal report that uses web services as a data source. When I deploy the report to Infoview it prompts me for a database username and password. Since I am not using a database it should not prompt me for these. I tried various options in the CMC->database settings for this report but it still prompts me for the database logon info or tells me that the database logon information is incorrect.
The report work fine in the Crystal Reports Designer.
Does anyone know how I can prevent this report from prompting me for the database logon info ?
Thanks,

What options have you tried in the CMC?
Have you tried running the report in Crystal Reports installed directly on the Enterprise machine?

Pros & Cons for consuming web services in ABAP using ABAP PROXY

Hi,
Other then performence is there any other disadvantages like security,etc for consuming web services in ABAP using ABAP proxy?
I really appreciate if some one provide the more details(Pros & Cons ) regarding cosuming web services and I also want to know is there any other way to consume web services in ABAP.
Thanks.

 is there any other way to consume web services in ABAP
you can use cl_http_client class to make your program to act as http client and post the soap message too webservice. This way you dont need to generate proxy, but you should know the soap message format.
Regards
Raja

We are using the Azure server for our web services. Server is generating an error "Unable to connect to the remote server". What is this error means

We are using the Azure server for our web services. Server is generating an error "Unable to connect to the remote server". What is this error means

Hello,
Did you means that you use the Windows Azure Virtual Machine DNS name as the server name in the Reporting Server Web Services URL?
For example:
Report server:http://uebi.cloudapp.net/reportserver
Report manager:http://uebi.cloudapp.net/reports
If you want to connect to Report Manager on the virtual machine from a remote computer, you should create a virtual machine TCP Endpoint and open the port in the virtual machine’s firewall. By default, the report server listens for HTTP requests
on port 80.
Reference:http://msdn.microsoft.com/en-us/library/jj992719.aspx#bkmk_ssrs_connect_2_remote_RM
Regards,
Fanny Liu
Fanny Liu
TechNet Community Support

Query for job status using Web Services in BODI

Hello,
I am starting a Batch job in DI using Web Services, getting the following response from DI:
Code:
<soapenv:Envelope
 xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 <soapenv:Body>
 <BatchJobResponse>
 <pid>704</pid>
 <cid>26</cid>
 </BatchJobResponse>
 </soapenv:Body>
</soapenv:Envelope>
How can I know the status of the started job?
How can I know if the job execution finished with success or not?
I did not find in WSDL file any method to query for job or service status...
Thank you in advance,
Adrian Mitrica

Did you ever get this figured out? I am having exactly the same problem in code generated by VS, with the BAPIRET2 structure.
Any help you could provide would be greatly appreciated.
Thanks!
Leighton Wingerd
Adirondack Solutions, Inc.
[email protected]

Problem using WSDL from SAP in IBM's RAD for generating web service client

When importing a WSDL from the ABAP stack on a SAP 6.40 system into IBM's RAD tool for generating a web service client there are errors with the soap fault classes that get generated. The WSDL declares the types for the faults with WebServiceName.RfcException and these have elements of name, text, and message. When the tools see this in the WSDL they generate classes that extend the Java exeception class and this causes an error because the "message" name conflicts with the standard java exception message. Has anyone else ran into this problem? It seems like a basic problem many java tools for generating web service client proxies would have because the soap faults get turned into java exceptions. This name conflict of the java exception with the WSDL fault definition means that code always needs to be adjusted and cannot simply use the classes that are generated from the WSDL. Anyone run across this or a similar problem in the java environment using the SAP WSDL?
Aaron

Hi,
Hello again .
Have you tried your service using soapui ?
You can use your WSDL as input .
In order to eliminate eclipse problem try this service:(I just did)
http://www.oorsprong.org/websamples.countryinfo/CountryInfoService.wso?WSDL
Regards.
package main;
import java.io.FileInputStream;
import java.rmi.RemoteException;
import java.util.Properties;
import org.oorsprong.www.websamples_countryinfo.CountryInfoServiceSoapType;
import org.oorsprong.www.websamples_countryinfo.CountryInfoServiceSoapTypeProxy;
import org.oorsprong.www.websamples_countryinfo.TCountryCodeAndName;
public class Main {
public static void main(String[] args) {
try {
   final Properties properties = new Properties();
   properties.load(new FileInputStream("properties.ini"));
   System.getProperties().putAll(properties);
} catch (final Exception exception) {
   exception.printStackTrace();
new Main();
public Main() {
try {
   final CountryInfoServiceSoapType infoServiceSoapType = new CountryInfoServiceSoapTypeProxy();
   final TCountryCodeAndName[] tCountryCodeAndNames = infoServiceSoapType.listOfCountryNamesByName();
   for (final TCountryCodeAndName tCountryCodeAndName : tCountryCodeAndNames) {
    System.out.println(tCountryCodeAndName.getSName());
} catch (final RemoteException exception) {
   exception.printStackTrace();

Error while using Web services for working with Informatica

[Status] : Initializing...
[Status] : Done
[Status] : Calling StartWorkflow...
From : DataIntegrationServiceSoapBindingStub
Reason getting : null
Jun 25, 2007 6:15:06 AM org.apache.axis.encoding.ser.BeanSerializer serialize
SEVERE: Exception:
java.io.IOException: Non nillable element 'reason' is null.
     at org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:215)
     at org.apache.axis.encoding.SerializationContext.serializeActual(SerializationContext.java:1426)
     at org.apache.axis.encoding.SerializationContext.serialize(SerializationContext.java:914)
     at org.apache.axis.message.RPCParam.serialize(RPCParam.java:200)
     at org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:433)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:139)
     at org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:477)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:315)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:269)
     at org.apache.axis.SOAPPart.saveChanges(SOAPPart.java:530)
     at org.apache.axis.attachments.AttachmentsImpl.getAttachmentCount(AttachmentsImpl.java:519)
     at org.apache.axis.Message.getContentType(Message.java:475)
     at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:343)
     at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138)
     at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
     at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
     at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
     at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
     at org.apache.axis.client.Call.invokeEngine(Call.java:2765)
     at org.apache.axis.client.Call.invoke(Call.java:2748)
     at org.apache.axis.client.Call.invoke(Call.java:2424)
     at org.apache.axis.client.Call.invoke(Call.java:2347)
     at org.apache.axis.client.Call.invoke(Call.java:1804)
     at samples.axis.proxyclasses.DataIntegrationServiceSoapBindingStub.startWorkflow(DataIntegrationServiceSoapBindingStub.java:744)
     at samples.axis.dataintegration.Sample1.main(Sample1.java:227)
Jun 25, 2007 6:15:06 AM org.apache.axis.attachments.AttachmentsImpl getAttachmentCount
WARNING: Exception:
AxisFault
faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
faultSubcode:
faultString: java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
faultActor:
faultNode:
faultDetail:
     {http://xml.apache.org/axis/}stackTrace:java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
     at org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:275)
     at org.apache.axis.encoding.SerializationContext.serializeActual(SerializationContext.java:1426)
     at org.apache.axis.encoding.SerializationContext.serialize(SerializationContext.java:914)
     at org.apache.axis.message.RPCParam.serialize(RPCParam.java:200)
     at org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:433)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:139)
     at org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:477)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:315)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:269)
     at org.apache.axis.SOAPPart.saveChanges(SOAPPart.java:530)
     at org.apache.axis.attachments.AttachmentsImpl.getAttachmentCount(AttachmentsImpl.java:519)
     at org.apache.axis.Message.getContentType(Message.java:475)
     at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:343)
     at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138)
     at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
     at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
     at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
     at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
     at org.apache.axis.client.Call.invokeEngine(Call.java:2765)
     at org.apache.axis.client.Call.invoke(Call.java:2748)
     at org.apache.axis.client.Call.invoke(Call.java:2424)
     at org.apache.axis.client.Call.invoke(Call.java:2347)
     at org.apache.axis.client.Call.invoke(Call.java:1804)
     at samples.axis.proxyclasses.DataIntegrationServiceSoapBindingStub.startWorkflow(DataIntegrationServiceSoapBindingStub.java:744)
     at samples.axis.dataintegration.Sample1.main(Sample1.java:227)
     {http://xml.apache.org/axis/}hostname:daa30144app003b
java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
     at org.apache.axis.AxisFault.makeFault(AxisFault.java:101)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:317)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:269)
     at org.apache.axis.SOAPPart.saveChanges(SOAPPart.java:530)
     at org.apache.axis.attachments.AttachmentsImpl.getAttachmentCount(AttachmentsImpl.java:519)
     at org.apache.axis.Message.getContentType(Message.java:475)
     at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:343)
     at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138)
     at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
     at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
     at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
     at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
     at org.apache.axis.client.Call.invokeEngine(Call.java:2765)
     at org.apache.axis.client.Call.invoke(Call.java:2748)
     at org.apache.axis.client.Call.invoke(Call.java:2424)
     at org.apache.axis.client.Call.invoke(Call.java:2347)
     at org.apache.axis.client.Call.invoke(Call.java:1804)
     at samples.axis.proxyclasses.DataIntegrationServiceSoapBindingStub.startWorkflow(DataIntegrationServiceSoapBindingStub.java:744)
     at samples.axis.dataintegration.Sample1.main(Sample1.java:227)
Caused by: java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
     at org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:275)
     at org.apache.axis.encoding.SerializationContext.serializeActual(SerializationContext.java:1426)
     at org.apache.axis.encoding.SerializationContext.serialize(SerializationContext.java:914)
     at org.apache.axis.message.RPCParam.serialize(RPCParam.java:200)
     at org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:433)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:139)
     at org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:477)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:315)
     ... 17 more
Reason getting : null
Jun 25, 2007 6:15:06 AM org.apache.axis.encoding.ser.BeanSerializer serialize
SEVERE: Exception:
java.io.IOException: Non nillable element 'reason' is null.
     at org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:215)
     at org.apache.axis.encoding.SerializationContext.serializeActual(SerializationContext.java:1426)
     at org.apache.axis.encoding.SerializationContext.serialize(SerializationContext.java:914)
     at org.apache.axis.message.RPCParam.serialize(RPCParam.java:200)
     at org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:433)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:139)
     at org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:477)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:315)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:269)
     at org.apache.axis.SOAPPart.saveChanges(SOAPPart.java:530)
     at org.apache.axis.SOAPPart.getContentLength(SOAPPart.java:229)
     at org.apache.axis.Message.getContentLength(Message.java:499)
     at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:371)
     at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138)
     at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
     at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
     at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
     at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
     at org.apache.axis.client.Call.invokeEngine(Call.java:2765)
     at org.apache.axis.client.Call.invoke(Call.java:2748)
     at org.apache.axis.client.Call.invoke(Call.java:2424)
     at org.apache.axis.client.Call.invoke(Call.java:2347)
     at org.apache.axis.client.Call.invoke(Call.java:1804)
     at samples.axis.proxyclasses.DataIntegrationServiceSoapBindingStub.startWorkflow(DataIntegrationServiceSoapBindingStub.java:744)
     at samples.axis.dataintegration.Sample1.main(Sample1.java:227)
Exception Occurred: java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
AxisFault
faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
faultSubcode:
faultString: java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
faultActor:
faultNode:
faultDetail:
     {http://xml.apache.org/axis/}stackTrace:java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
     at org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:275)
     at org.apache.axis.encoding.SerializationContext.serializeActual(SerializationContext.java:1426)
     at org.apache.axis.encoding.SerializationContext.serialize(SerializationContext.java:914)
     at org.apache.axis.message.RPCParam.serialize(RPCParam.java:200)
     at org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:433)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:139)
     at org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:477)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:315)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:269)
     at org.apache.axis.SOAPPart.saveChanges(SOAPPart.java:530)
     at org.apache.axis.SOAPPart.getContentLength(SOAPPart.java:229)
     at org.apache.axis.Message.getContentLength(Message.java:499)
     at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:371)
     at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138)
     at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
     at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
     at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
     at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
     at org.apache.axis.client.Call.invokeEngine(Call.java:2765)
     at org.apache.axis.client.Call.invoke(Call.java:2748)
     at org.apache.axis.client.Call.invoke(Call.java:2424)
     at org.apache.axis.client.Call.invoke(Call.java:2347)
     at org.apache.axis.client.Call.invoke(Call.java:1804)
     at samples.axis.proxyclasses.DataIntegrationServiceSoapBindingStub.startWorkflow(DataIntegrationServiceSoapBindingStub.java:744)
     at samples.axis.dataintegration.Sample1.main(Sample1.java:227)
     {http://xml.apache.org/axis/}hostname:daa30144app003b
java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
     at org.apache.axis.AxisFault.makeFault(AxisFault.java:101)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:317)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:269)
     at org.apache.axis.SOAPPart.saveChanges(SOAPPart.java:530)
     at org.apache.axis.SOAPPart.getContentLength(SOAPPart.java:229)
     at org.apache.axis.Message.getContentLength(Message.java:499)
     at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:371)
     at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138)
     at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
     at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
     at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
     at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
     at org.apache.axis.client.Call.invokeEngine(Call.java:2765)
     at org.apache.axis.client.Call.invoke(Call.java:2748)
     at org.apache.axis.client.Call.invoke(Call.java:2424)
     at org.apache.axis.client.Call.invoke(Call.java:2347)
     at org.apache.axis.client.Call.invoke(Call.java:1804)
     at samples.axis.proxyclasses.DataIntegrationServiceSoapBindingStub.startWorkflow(DataIntegrationServiceSoapBindingStub.java:744)
     at samples.axis.dataintegration.Sample1.main(Sample1.java:227)
Caused by: java.io.IOException: java.io.IOException: Non nillable element 'reason' is null.
     at org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:275)
     at org.apache.axis.encoding.SerializationContext.serializeActual(SerializationContext.java:1426)
     at org.apache.axis.encoding.SerializationContext.serialize(SerializationContext.java:914)
     at org.apache.axis.message.RPCParam.serialize(RPCParam.java:200)
     at org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:433)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:139)
     at org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:477)
     at org.apache.axis.message.MessageElement.output(MessageElement.java:1208)
     at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:315)
     ... 17 more

Hi All,
Now again i am getting below error when i am calling wokrflow to run using Web Services HUB.
please can any one help out me in this.
AxisFault
faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
faultSubcode:
faultString: java.lang.NullPointerException
faultActor:
faultNode:
faultDetail:
     {http://xml.apache.org/axis/}stackTrace:java.lang.NullPointerException
     at org.apache.axis.message.SOAPEnvelope.addHeader(SOAPEnvelope.java:230)
     at org.apache.axis.client.Call.invoke(Call.java:2789)
     at org.apache.axis.client.Call.invoke(Call.java:2501)
     at org.apache.axis.client.Call.invoke(Call.java:2424)
     at org.apache.axis.client.Call.invoke(Call.java:1835)
     at AI.Informatica.proxyclasses.DataIntegrationServiceSoapBindingStub.startWorkflow(DataIntegrationServiceSoapBindingStub.java:1101)
     at AI.Informatica.javasrc.GSS_Informatica.start_workflow(GSS_Informatica.java:745)
     at AI.Informatica.javasrc.GSS_Informatica.execute(GSS_Informatica.java:1384)
     at AI.Informatica.javasrc.GSS_Informatica.main(GSS_Informatica.java:382)
     {http://xml.apache.org/axis/}hostname:win2k3sami
java.lang.NullPointerException
     at org.apache.axis.AxisFault.makeFault(AxisFault.java:104)
     at org.apache.axis.client.Call.invoke(Call.java:2504)
     at org.apache.axis.client.Call.invoke(Call.java:2424)
     at org.apache.axis.client.Call.invoke(Call.java:1835)
     at AI.Informatica.proxyclasses.DataIntegrationServiceSoapBindingStub.startWorkflow(DataIntegrationServiceSoapBindingStub.java:1101)
     at AI.Informatica.javasrc.GSS_Informatica.start_workflow(GSS_Informatica.java:745)
     at AI.Informatica.javasrc.GSS_Informatica.execute(GSS_Informatica.java:1384)
     at AI.Informatica.javasrc.GSS_Informatica.main(GSS_Informatica.java:382)
Caused by: java.lang.NullPointerException
     at org.apache.axis.message.SOAPEnvelope.addHeader(SOAPEnvelope.java:230)
     at org.apache.axis.client.Call.invoke(Call.java:2789)
     at org.apache.axis.client.Call.invoke(Call.java:2501)
     ... 6 more
Thanks in advance.
Mahesh.

Implementation of session handling for using web services

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