Hi,

Can someone of you please explain me the possible solution for the below scenarios. These were asked during an interview.

1) We have two web server and two JVM's. Only half of the users are able to acess the application and others are not. How will you debug this scenario.

2)We have two web server and two JVM's. How would you make all requests go to one server alone without stopping the JVM's.

If possible can you please suggest me a website or book which discuss the scenario's like above.

Thanks
ANil

Ans 1:
As a part of troubleshooting, I will check Web server logs (ex: access.log, error.log) for response code. If both web servers are working ok then its time to check JVM logs. On an average Question 1 is due to to no response from one of the two webserver. Web server restart will help to troubleshoot this issue.

Ans 2:

I will change Load-balanced weight to 0 in plugin-cfg.xml to stop forwarding load on JVM. This doesn't need web server or JVM restart.

Hi Aziz,

Thanks for the reply.

If possible can you please suggest me a website or book which discuss the scenario's like above.

Anil

For Q2 :

www-01.ibm.com/support/docview.wss?uid=s...
www-01.ibm.com/support/docview.wss?uid=s...

1)     We have two web server and two JVM's. Only half of the users are able to access the application and others are not. How will you debug this scenario?

Only half users are able to access:  

For internal and external users:

1. Check both applications servers and webservers are up and healthy


2. Check the access logs and plugin logs for any issues.


3. Check your network devices


4. Check the IP sub net of users not able to access the applications there may be an issue with the ISP’s

2)       www-01.ibm.com/support/docview.wss?uid=s...

Hi Chandu,

Thanks for the reply.

If possible can you please suggest me where i can find these type of scenarios to prepare for the interview.

Anil