1.WHAT IS TRACING?
Tracing is when you go through an entire program and record the value of variables and the output. You trace a program when you want to find out what actually went wrong
Tracing is when you go through an entire program and record the value of variables and the output. You trace a program when you want to find out what actually went wrong
2.WHERE TO GIVE APPLICATION PRIORITY WHILE STARTING SERVER?
it will be under Enterprise applications ->app name -> startup behaviour ->Startup order in the admin console
it will be under Enterprise applications ->app name -> startup behaviour ->Startup order in the admin console
3.HOW TO MOVE CODE DEV ENVIRONMENT TO TESTING ENVIRONMENT?
I’m sure what they mean by code here. I think, incase of applications, export them from in DEC and deploy in TEST.
I’m sure what they mean by code here. I think, incase of applications, export them from in DEC and deploy in TEST.
4.WHAT IS SSL?WHEN IT ENCRYPT & DECRYPT THE DATA?
SSL are digital signed certificates. user for meesage/communication integrity and confidentiality. Generally encrypt at Sender side and decrypt at receiver side
SSL are digital signed certificates. user for meesage/communication integrity and confidentiality. Generally encrypt at Sender side and decrypt at receiver side
5.WHAT IS INCIDENT MANAGEMENT?
It is part of ITIL process….. simple explanation is, when there is a problem in ur WAS environment, which procedure do you follow.
It is part of ITIL process….. simple explanation is, when there is a problem in ur WAS environment, which procedure do you follow.
6.WHEN APPLICATION IS DOWN WHAT U WILL DO?
First look at the logs for errors. If you find the error, save the logs and start ur application. Then start trouble shoot.
If no error found, run a trace and look for FFDC etc..
First look at the logs for errors. If you find the error, save the logs and start ur application. Then start trouble shoot.
If no error found, run a trace and look for FFDC etc..
7.I HAVE 16GB RAM,WHAT IS THE MINIMUM & MAXIMUM HEAPSIZE ?
No relation. Heap settings should be made depends on application
No relation. Heap settings should be made depends on application
8.HOW TO OPEN ADMIN CONSOLE IN AIX/UNIX & WHAT IS THE DEFAULT FILE SYSTEM OF AIX?
admin console can be viewed from remote machine which has a browser, if not behind firewall.
admin console can be viewed from remote machine which has a browser, if not behind firewall.
9.WHAT IS FILE DESCRIPTORS IN AIX?
A file descriptor is a handle created by a process when a file is opened. There is a limit to the amount of file descriptors per process.If the file descriptor limit is exceeded for a process, you may see the following errors:”Too Many Open Files”
A file descriptor is a handle created by a process when a file is opened. There is a limit to the amount of file descriptors per process.If the file descriptor limit is exceeded for a process, you may see the following errors:”Too Many Open Files”
10.HOW TO RESOLVE PORT CONFLICTS IN PRODUCTION ENVIRONMENT?
check why there is port conflict
run updateports script in WAS
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how do you create a cluster
go to servers -> clusters-> new ->give cluster_name->define first member->define other members->finish
how do you add a new cluster member
go to servers -> clusters->cluster_name ->cluster members ->new ->give name/node/others->apply->ok->save
go to servers -> clusters->cluster_name ->cluster members ->new ->give name/node/others->apply->ok->save
one of the cluster member (jvm) is having issues. To troubleshoot the issue, you decided to take it out of the cluster. How do you do that?
Make its runtime weight to 0
Make its runtime weight to 0
In a complex environment, there are 10 machines. Machine A is having 8GB RAM and machine B having 2GB of RAM. The administrator decided to send twice as many request as machineB to machineA. How can he achive it?
give machineA twice the weight as machineB
give machineA twice the weight as machineB
After making some changes on a cluster, it is required to recycle/restart all the cluster JVMs. The lead admin told you to make sure that there should not be any downtime during this recycle. Which option do you use to achieve it?
Ripplestart
Ripplestart
A large application which has 5web modules has been deployed on to a cluster. After some months, the developer asked you to update on of the 5web modules. How do you do it?
Rollout
Rollout
can you change the cluster name, once it was created
No
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. What is virtual host in websphere application server?
Virtual host is a configuration not a physical one. A configuration that lets a single machine resemble multiple host machines. Each virtual host has a logical name and a list of one or more DNS host aliases by which it is known. By default, we wull have a default_house and admin_host virtual hosts defined in websphere application server.
3. how do i connect my application to talk to a database?
To achive this , you need to create a JDBC provider and datasource. The JDBC provider object encapsulates the specific JDBC driver implementation class for access to the specific vendor database of your environment. The data source object supplies your application with connections for accessing the database. The best way to learn more about this task is login to administration console –> guided activities –> connecting to a database.
4. How can i make sure that my servers are available while restarting a cluster?
Use the option ripplestart … It first stops and then restarts each member of the cluster.
5. I’ve made some changes to my applicaiton’s web.xml , how and where should i update this file?
You can do this from the administration console. Go to enterprise applications –>select your application and click update. on the next panel, you’ll have option to update the entire application, a single module or even a single file or multiple files.
Select the single file option and specify the file’s path you like to update. Specify a relative path to the file that starts from the root of the war/ear file. So it looks something like this: app1.war/WEB-INF/web.xml
6. How do i minimize the downtime while i’m updating the applications?
Use rollout update option. This option sequentially updates an application on multiple cluster members across a cluster. After you update an application’s files or configuration, click Rollout Update to install the application’s updated files or configuration on all cluster members of a cluster on which the application is installed.
Rollout update will save the application configurations then stops the cluster members on a node then syncs the configuration and stat the clusters members on that node. Then it proceeds to the next node and does the same steps.
Rollout update will save the application configurations then stops the cluster members on a node then syncs the configuration and stat the clusters members on that node. Then it proceeds to the next node and does the same steps.
7. We are getting a ‘class not found’ and developers like to know, if that class is being loaded or not. how can i assist them troubleshoot the issue?
WebSphere administration console has a utility using which you can see what classes are loaded at what scope for an application. Go to Troubleshooting –>class loader viewer and select the module.
8. We have some issue with our application server and we tried killing it using kill-9 command, the process disappeared for few seconds but it is back again. We did not start the server but it started. What would be the reason?
Servers > Application Servers > server_name. Then, under Server Infrastructure, click Java and Process Management > Process Definition > process > Monitoring Policy. Here we have an option Automatic Restart, this Specifies whether the process should restart automatically if it fails. On distributed systems, the default is to restart the process automatically.
9. Is there a way i can start my server along with nodeagent ?
Servers > Application Servers > server_name. Then, under Server Infrastructure, click Java and Process Management > Process Definition > process > Monitoring Policy. Here we have an option Node Restart State which specifies the desired behavior of the servers after the node completely shuts down and restarts.
- STOPPED – node agent does not start the server.
- RUNNING – the node agent always starts the server.
- PREVIOUS – the node agent starts the server only if the server was running when the node agent stopped.
Test connection failed issue:
Problem(Abstract)
Test Connection fails on data source which has newly created J2C Authentication Alias.
Cause
After configuring the data source, click the Test Connection button from Administrative Console gets the following error:
The test connection operation failed for data source [datasource] on server nodeagent at node [node] with the following exception: java.lang.Exception: java.sql.SQLException: null userid not supported
DSRA0010E: SQL State = null, Error Code = -99,999. View JVM logs for further details.
Resolving the problem
The problem can be easily solved by restarting the Java process (application server, node agent or deployment manager) for which the Test Connection is running based on the following:
- In the IBM WebSphere Application Server Base environment, there is a single Java process running. The Administrative Console runs in this process, and Test Connection operation for the data source takes place in this process as well.
- In the WebSphere Network Deployment environment, the Test Connection operation for data sources configured at the server or cluster scope is performed in the node agent of that server. The data source configured at the node or cell scope is performed in the node agent or deployment manager servers respectively.
