Weblogic Startup Error: weblogic.store.PersistentStoreException: java.io.IOException

Problem : WebLogic Server(Admin or manged ) Fail During Startup with NullPointerException

Symptom:
Weblogic fails to startup with the below error:

<Jun 29, 2013 9:48:20 AM CDT> <Critical> <WebLogicServer> <BEA-000386> <Server subsystem failed. Reason: java.lang.NullPointerException
java.lang.NullPointerException
        at weblogic.store.io.file.StoreFile.close(StoreFile.java:440)
        at weblogic.store.io.file.Heap.open(Heap.java:320)
        at weblogic.store.io.file.FileStoreIO.open(FileStoreIO.java:104)
        at weblogic.store.internal.PersistentStoreImpl.recoverStoreConnections(PersistentStoreImpl.java:431)
        at weblogic.store.internal.PersistentStoreImpl.open(PersistentStoreImpl.java:422)
        Truncated. see log file for complete stacktrace
>
<Jun 29, 2013 9:48:20 AM CDT> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FAILED>
<Jun 29, 2013 9:48:20 AM CDT> <Error> <WebLogicServer> <BEA-000383> <A critical service failed. The server will shut itself down>
<Jun 29, 2013 9:48:20 AM CDT> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FORCE_SHUTTING_DOWN>

Solution:

The persistent store file somehow got corrupted. Take the backup of it and delete it.

Go to $DOMAIN_HOME/servers/<server_name>/data/store/diagnostics/WLS_DIAGNOSTICS000000.DAT

Take the backup of this WLS_DIAGNOSTICS000000.DAT file and delete it. Now restart the server, it should solve the issue.

Weblogic startup error: ERROR: transport error 202: bind failed: Address already in use

Introduction

When we have multiple managed server's configured in a single domain running on same debug port, it gives the below error while starting a managed server


ERROR: transport error 202: bind failed: Address already in use
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [../../../src/share/back/debugInit.c:690]
FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=AGENT_ERROR_TRANSPORT_INIT(197)

This error occurs when you have configured your Node Manager and trying to start the server using Node Manager.

Solution

1) Disable the debugFlag in setDomainEnv.sh file

• Take backup of  <DOMAIN_HOME>/<DOMAIN_NAME>/bin/setDomainEnv.sh
• Modify the debugFlag="true" to debugFlag="false" in setDomainEnv.sh

This will disable the debug and will solve the issue. Else if you want to enable debug, you can follow second option.

2) Give different debug port for all the managed servers

• Take backup of  <DOMAIN_HOME>/<DOMAIN_NAME>/bin/setDomainEnv.sh
• Add the below lines for all the managed server in setDomainEnv.sh

if [ "${SERVER_NAME}" = "soa_server1" ] ; then

   DEBUG_PORT="7453"

   export DEBUG_PORT

   

 if [ "${SERVER_NAME}" = "osb_server1" ] ; then

   DEBUG_PORT="7454"

   export DEBUG_PORT

Here it will take different value of debug ports while starting, hence will not give the address already in use error.

After the changes restart the domain. This should solve the issue !!

How to Integrate Salesforce services with Oracle Fusion Middleware ?

Introduction

Recently there was a requirement of a customer to integrate Salesforce.com web-services with Oracle Fusion Middleware/Oracle SOA.
Scenario was, a SOA composite will try to access Salesforce services. We need to configure Oracle Fusion Middleware to access the Salesforce services (external web-services) outside the firewall.

To achieve this we need to perform two steps:

Install the salesforce web services certificate in the Weblogic Trust store (DemoTrust.jks or cacerts)

Download the certificates by accessing the web-service and then import the certificates using Java Keytool

• keytool -keystore "DemoTrust.jks" -import -alias "test.salesforce.com" -file "test.salesforce.com.crt"

Verify if the certificates are added or not by giving the following command:

• Keytool -list -keystore DemoTrust.jks

Second Step is to configure the proxy in SOA Domain to access the remote SalesForce services

For SOA services to communicate to external web-services we need to configure proxy in SOA Server/Weblogic.

Following changes need to be made in setSOADomainEnv.sh (Linux Environment)

The EXTRA_JAVA_PROPERTIES variables needs to be modified as follows

EXTRA_JAVA_PROPERTIES="${EXTRA_JAVA_PROPERTIES} -Dhttps.proxySet=true -Dhttps.proxyHost=proxy.aj.com -Dhttps.proxyPort=443 -Dhttp.nonProxyHosts=localhost|127.0.0.1"

export EXTRA_JAVA_PROPERTIES

https.proxyHost: Your proxy Host
https.proxyPort: Your proxy port, 443 is the default port for https
http.nonProxyHosts: Your non proxy servers, the list can be separated with a "|"

After all the changes are done, restart the complete domain.

How to develop a SOA Composite using JDeveloper ?

Introduction

Starting point of any new technology or language is to make it say 'Hello'. Personally, for me to get acquainted to a new programming language is to write a 'hello world' program. Same I would like to do today by showing you how to develop a Simple Hello World Composite.

Before Starting with SOA development, make sure you have:

• SOA installed
• Jdeveloper with SOA Extension Enabled

Let us get Started.

Overview:

We will create a SOA Composite which will take input as a String(your name) and return the output as Hello <String Entered>.

Developing a Composite:

Open Jdeveloper and create a New Application by Navigating to File->New->Application->SOA Application. Click on Ok.

Enter the name of the Application in the next screen:

Enter name of the Project (HelloWorld) and make sure SOA is selected as shown.Click on Next.

 Now select the option 'Composite with BPEL Process'. Click on Finish.

Select 'Synchronous BPEL Process' from the drop down. Click on Ok.

Now you have successfully created a basic composite with a Synchronous BPEL process. It should look something like this:

Next step is to do some configurations in our BPEL Process so that it can understand what it needs to do.

Double click on the BPEL Process. You will see the below screen. 

Now you can make out easily what we are trying to do. It is same Java Programming. Some Input/Output variables.Some transformations, assignments, connection. 

Here we have a client, which will send a request (so it has a receive activity). It also has the power to give Output (hence replyOutput activity). So what is missing ???

We need to concatenate the input with 'Hello' and assign it to the output variable.

To achieve this, add the assign activity by dragging it from BPEL Constructs(see the right side of the pane)

Now the assign activity is added, we are ready to concatenate. 

Double click on Assign Activity.

We want to assign input to the process to the result, after concatenating 'Hello' to the front.

Drag the function (highlighted) on the result variable.

In this screen, Select String Function from the drop down, double click on concat, you can see the format/description of the function.
It accepts arguments in quotes separated by comma.
Give the First argument as 'hello'.
For second argument, double click on client input string after expanding input variable.

Click on Ok and Apply and save it.

Now you are ready to deploy your first BPEL Project on your SOA Server.

Start your SOA server if not already started.

Steps to create an Application Server connection in Jdevloper:

Click on File->New->Connection->Application Server Connection.

Give the connection name and click on Next.

Give the Username and password to connect to Admin Server.

Give the Hostname,  Port number of Admin Server and name of your domain. Click on Next

Give Test Connection. If all the test are successful. Click on Next and then Finish.

Deploying the Composite:

Right click on the project and select deploy as shown:

Select the Application Server connection you created in the next couple of screen and at the end click on Finish.

If you see the above screen, it means you have successfully deployed the composite on the SOA Server.

Now time to test our HelloWorld composite :)

Login to EM Console. Click on your composite. Click on Test Button. Enter the input as shown:

Click on Test Web Service Button. You will see the output as below !

Voila :) 

You have successfully created, deployed and tested a SOA Composite !!!

Welcome to SOA Development with JDEVELOPER

Explore and learn from here ;)

Cheers